# TblEvent

Event:
marker bouy (baseball) at 36 51.76, 122 08.873


Event:
loss of trim, had to ballast -50 lbs with pisppi


Event:
clathrate stand is at 908.2 m North of the Homer #16, just below some neptunia egg cases


Event:
During dive no toolsled conection could be made, therefore no suction pump could be used to collect brachs


Event:
deloyed homer 11 @945.6m just below transit tape MC945


# TblFailure

Failures:
High flow suction sampler not working. Measured voltage at connector = 0. Pulled core can to discover channel blown. Tried to switch to low flow suction sampler channel and that to blew a fuse. Tightened cans to dive problem still has to be troubleshot.


Failures:
Fwd Incandescent (UV) light missing EO dummy plug.


Failures:
Aft Incandescent light ground faulting, was dummied off.


Failures:
Channel one on Toolsled controler board had a blown fuse and FET chip.


Failures:
Tried to set up HFSS using LFSS connector, channel 2, powered up and blew a fuse.


Failures:
Intermittant light ground fault. Suspect loose EO connector.


Failures:
Conductivity sensor was broken on the top of the CTD.  Suspect the teather cought it when the crain was reconfigured following gear off loadind from a CTD day.


Failures:
Intermittant Lights ground fault. Suspect aft incandecent light.  Replaced Aft incandecent light.


Failures:
Had no control of vehicle thrusters on 1st launch with either the bellypack or the forepeak.  Recovered the vehicle, reloaded the software and the problem was solved.


Failures:
Vertical Thrusters stuck in up position. Suspect sticking servo valve. Replaced vertical servo valve with spare, see maintenance log.


Failures:
Seaspray computer would not boot up following last night's power outage.  Had to shut down and restart.


Failures:
Intermittant light ground fault appearing below 300 meters.


Failures:
Toolsled would not connect this morning. Tried again when on station and connected.


Failures:
HFSS motor was replaced with hydraulic suction motor controlled by D4 and cutter was controlled by D3, which appeared not working during the dive.


Failures:
Vertical thrusters were backwards this morning, suspect servo valve was wired backwards lastnight.  Problem corrected in software.


Failures:
Upon testing the newly installed main pump, when pressure reached 2000 psi a swegelok fitting coming off the high pressure filter blew taking the ferrule clean off the 1/2" tubing.


Failures:
Rexroth pump (spare) needs rconditioning.


Failures:
Lights ground fault now consistant .1 Megaohms in water.


Failures:
Lights ground fault now consistant .1 megaohms.


Failures:
Sonar not working in present configuration.  Had to tie power supply gnd common to signal gnd for acoustic flow meter.  Will return to previous set up after the dive.


Failures:
Lights gnd fault traced down to aft inc. cable female EO connector from light can.  Replacement cable needs to be made.


Failures:
Aft Inc/Cam Inc to light can cable was swapped with UV light/Inc spare cable after dive.  Solved Lts Gnd fault problem.


Failures:
Hose on stdb arm and upper pan and tilt. Lens on supper harp cracked.


Failures:
No toolsled connection could be made  therefore suction sampler couldn't be used.


Failures:
flooded video sighted still source of water ingression unknown


Failures:
lost connection to toolsled on serveral occaissions. final no connect


Failures:
check valves on hopcroft carousel siezed.


Failures:
improper wiring on suction sampler index motor. plugged into wrong connector.


Failures:
Medium oil alarm when reachd surface ,  soon followed by low oil on recovery.    Found to be a result of a cracked oil pipe to high pressure relife.


Failures:
Port manipulator no sholder feed back.   Stbd manip elbow feedback .


Failures:
CTD shut down during dive , telemetry errors on diagnostics screen.


Failures:
Excessive hydraulic pressure indicated on pilots screen(100psi over)at depth.


Failures:
Odomiter, achoustic flow meeter and rs 232 linc all failed during dive.


Failures:
sheared bolts off on brake of main hyddraulic drive


Failures:
broken line on 7fn manip caused the abort of the dive


Failures:
homer #16 failed to respond on deck when tested-we will investigate.It was not deployed.


Failures:
The seal on the starboard thruster was in excess of thirty psi upon recovery of the vehicle.We will replace on Monday---maintenence day


Failures:
Ore transducer suspected of being damaged,received bad hits all day .Replaced transducer 11/11/96


Failures:
bulb failure, most likely a result of pilot error,engaging auto head. no spares on board.


Failures:
CO2 pressure relief valve failed causing CO2 to vent to sea


Failures:
HPIB link between the RS20 and the ICS went down. Connectors and cables seem ok. Could be a software problem.


Failures:
Water alarm in Telem can at 165 M during vehicle recovery. Went dead boat recovery.  Found small amount of water in the can. Cleaned all O rings, dried and reassembled. Held a vaccume o 15 psi.


Failures:
Telem water alarm at 165 meters upon recovery, went dead boat.  Found some evidence of water in the bottom of the can. Cleaned all O rings and dried out the can. Can held a vacuum at 15 psi.


Failures:
Blew a hyd line from the aux servo valve to the "anchoring" thruster.  The valve was enabled with the valve full opened causing the hose to burst.


Failures:
lock up of tlsld ctr due to menu pull down on GUI


Failures:
analog out put from CSP to the ORE not functioning. suspect cable to ISE interface tray.


Failures:
lost data comms to vehicle, on reset lost video up.


Failures:
ORE was not tracking the vehicle below 500 M.  Messages of EC57 and "No Recent replies" appeared on screen constantly.  Another becon was tested by lowering over the side, it worked.  So the vehicle was recovered and the becons were changed out.


Failures:
SGI video frame grabber did not have an image input all day.  Tracked down input cable to RGB/digital converter and everything appeared OK.


Failures:
ORE tracking invalid below 500 M. Believe problem was operator error .  Consol was left in transponder mode during previous dive's trouble shooting.


Failures:
No ICS  link to RS20, Sony controls behaved irratically. Tried to solve by checking connectors, rebooting RS20, resetting SBC and finally resetting ICS computer. Problem remained throughout the dive.


Failures:
No image to SGI computer, same as previous dive.


Failures:
stbd inside daylight failed. swapped bulbs and no affect, swapped lamps all okay. Lamp limits depth of vehicle to 1000m


Failures:
Telemetry lock up. Rebooted everyhing and successfully regained telemetry. lost one of the structured light bulbs.


Failures:
Lost one structuctureded light bulb after rebooting vehicle telemetry.


Failures:
Port bulb became dim in mid transect. The voltage was increased to max setting of 68.9 volts.  The Stbd bulb was just replaced on previous dive. The light appears to be getting dimmer as we continue.


Failures:
toolsled suction sampler ground faults at 80% power


Failures:
toolsled motor appears to have problem with cable/connector


Failures:
Vehicle wanted to turn to port with the joystick zeroed.  Possible valve is sticking.


Failures:
No command to the port thruster from the bellypack.  Seemed to have it for a second during launch but could not get it back.


Failures:
port thruster control not stable. new cable ends required


Failures:
csp/ics computer began to alarm (like a key board alarm) Telemetry was lost the vehicle was brought down. It appeared like a power glitch.


Failures:
ctd would not stay up for any length of time. Suspect either the soft ware or the serial stream from the vehicle.


Failures:
Reed switch for low oil sensor was replaced on previous day.  It needs to be adjusted . As currently configured, alarm is not activated until resevior is empty.


Failures:
lower laser needs new bulkhead connector.


Failures:
Stbd outside DL would not come on. .5M ohm ground fault on lights channel when that light was turned on, dropping to 1.0M ohms when light was turned off. Tested on deck O.K.


Failures:
Stbs outside DL would not work during dive. .5M ohm ground fault observed on lights channel, dropped to 1.0M when stbd outside DL was turned off. All lights worked OK on deck both pre and post dive.


Failures:
1/4 inch hyd line on Mongo's jaw close sprung a leak.


Failures:
mongo not responding to commands. appears to have hydraulic pressure and communication to slave. May be servos


Failures:
MOS stopped displaying updated data. no ships position, no rov position. Frog still running as per normal


Failures:
term can water alarm indicated on launch, connectors cleaned,fault cleared.


Failures:
biolum camera installed, cross talk coming from upper msc.


Failures:
bad data to software display, serial data from vehicle looked ok. Software seemed to lock up at -99.99 all four channels


Failures:
TMS shut down, no display and no power indicator lights


Failures:
Toolsled Disconnected, had to cycle power on core 115.


Failures:
Had difficulty picking up Mongo's swing function. Adjusted limit settings until arm picked up, then set back to original settings.  Swing out responded very slowly, while swing in appeared normal.


Failures:
Water in telem can due to crushed wire under o ring in depth sensor penitrotor.


Failures:
Winfrog computer locked up, had to reset. I had to log on as myself to enter this data base, then cannot log on the winfrog.


Failures:
Feed back on the main sony camera not updateing on the touch screen.The pan and tilt GUI is locked up,or a none runner.


Failures:
Tilt on the main camera is sluggish with a 5 to 10 second delay before responding to the trigger command.


Failures:
Vehicle turns to stbd with neutral stick.


Failures:
franklin drawing in excess of 60 amps continuously


Failures:
Gyro seems to oscillating 10 degrees.This problem seems to come and go with no pattern  or depth change.


Failures:
After viewing the port thruster in the micro seacam and noticing that the vehicle wants to spin to port ,the starboard thruster servo valve may need some adjustment to properly null.


Failures:
Aft light found to groundfault. Dummy plug


Failures:
Groundfault on aft light. Plugg missing on forward light.


Failures:
Sonar not opperational. Changed for new head and new cable.


# TblInventory

Item:
High pressure hydraulic filter for Ventana.


# TblMaintenance

Problem/Changes:
R&R wrist rotate sliprings on 5 function. Scored outer race was the cause of the leaking joint.

Solution:
honed the race on the lathe, replaced "o"rings

Recommendation:
purchase  supply of 232-233 "o" rings and


Problem/Changes:
installed a prototype potentiometer housing on the Sony camera tilt unit.


Problem/Changes:
replaced the BIW blkhd to the txfmr/tel,ise blkhd to the alt/tel, ise blkhd to the paro/tel and the 4p4c EO connector to the oil level.

Solution:
Replace all blkhd type connectors with msaj or equivalent.


Problem/Changes:
installed Parker QDs in place of the Swaggelok QT8s.

Solution:
Parker supplies a rebuild kit for these. We can repair the them

Recommendation:
more pairs need to be purchased to facillitate the


Problem/Changes:
Found leak on the starboard thruster seal


Problem/Changes:
Rebuilt the oil level indicator,ie: new sensors and cable(msaj connector),and installed . Tested and calibrated.

Recommendation:
Rework to include a 50% alarm indicator..


Problem/Changes:
Changed out toolsled--- from  mid water  to  benthic and reconfigured the  vehicle . Shifted the lights that were out side the light bar to inside.Put the aux  micro seacam on the port side swing arm.


Problem/Changes:
General: Hooked up a.p.u. and ran all systems to test. All systems meaning--both manipulators,Swing arms and swing arm brakes,camera pan and tilts  and drawer.Also ran all thrusters,filled main resevoirs and electrical compensator.Noticed that the oil comped biw connector on the telemerty can(heading to the transformer can)has a leak.

Recommendation:
Replace the o-ring in the  biw connector


Problem/Changes:
Calibrate the stereo cameras,after moving the slave camera back into position.


Problem/Changes:
Start a inventory of thruster motors ,call thd to inquire about rebuilding the motors.


Problem/Changes:
Telemetry can was opened and the second altimeter was wired into the existing altimeters common and power source.The second altimeter was dummied off to prevent posible noise crossover.


Problem/Changes:
Mike duked with the oil level indicator,recalibrated,and installed


Problem/Changes:
Made an inventory of all thruster motors.and it goes like this.
Rexroth--2 total -A2F -16
1 stamped A
1 installed  in a nozzle to provide extra thrust for the 2 meter core.
Volvos--4 total--F11-10
1 stamped 3
1 stamped 0
1 stamped 1
1 stamped W
Main  Motors-rexroth -A10v-25-DFR-1RL-4     2 Total
1 stamped m
1 stamped L 
Also in stock 
3 acthley servos
2 full size 
1 small

Solution:
We will send 1 rexroth motor--stamped A to THD hydralics in Texas to be rebuilt.
The two volvo motors ,stamped O and 1 are questionable and we will do some in house testing.


Problem/Changes:
Repaired a broken  wire in the portside stereo camera.The cameras were tested to our satisfaction.


Problem/Changes:
Noticed that we were losing oil out of a BIW connector . Valve pack to telemety can.

Solution:
replace the o -ring  in the BIW connector.Upon completion noticed that the ground fault indicator went hard in valves.SHIT
Dissconnected the connector and the ground fault remained.  ?


Problem/Changes:
After dive #1203 started to reterminate the vehicle.
Cut tether and started to dissassemble and inspect the bullet and
remove the tether can.


Problem/Changes:
Monday--campleted stageing, ie:fushion splicer, norland laser,   
optical time domain reflectometer,etc.Then  removed the outer 
yellow jacket to reveal four layers of kevlar windings.Next we put 
on the heat shrink and the strain relief whip.We preped the tether 
end to be epoxied by sanding and wipeing down with acetone.
Next we set up a pouring stand with three rings set to different levels, and wove the four layers of kevlar out in expanding diameters from the center of the bullet.Next we instaled the 
spigot(to accept one end of  the tygon tubing--comp)and leveled.
Mixed the epoxy and poured.Let cure 24 hrs.


Problem/Changes:
Start by examineing the pour,it looks good ,cut excess kevlar strands away . Fit tygon tubing to spigot and install dorn gland on the other end.Strip back the shield and prepare the five copper 
power leads for installation.Solder the ground to the shield and
match up the numbers on the outer jackets of the power leads
and solder.High heat electrical tape and two layers of heat shrink
used on each.
Next,,we carefully unraveled the 10 optic fibers,identified and 
began fusion slicing.While doing so we hooked up a db loss
meter to be able to assess our spices.Spliced 9 out of 10.


Problem/Changes:
Wednesday.-- Finished splicing the last fiber  then wired in the water alarm.Then assemble the tether can and comp with  silicone based oil.Watched for leaks.Next we decided to test  our splices and got very confusing readbacks from the o.t.d.r..We tenativly hooked up the optics and the power sources to the vehicle and tested.
Everything worked ,so we unhooked the optics and power 
sources and started the final installation of the tether can.
Installed the slider and dog bones for the crane end whip.
Plugged in franklin and transformer can + fiber optics in 
F.O. can,hooked up water alarm and fired up vehicle. Test 
again ,Good to go!  Tie wrapped and closed up the F.O. can.

Solution:
Some results of the db loss meter  in line with our splices.First it was 
determined that the fiber optic cable we were using as a bridge 
between the forepeak and the F.O.can had a db loss of -23.31.
                                  Read on------------- ------ ---

F.O.side  labeled #6 resulted in a total db loss of -29.02 or -5.51dbs
F.O. side labeled #9 resulted in a total db loss of -29.09 or--5.58 dbs
F.O. side labeled #10 resulted in a total db loss of 34.39 or -11.08
F.O.side labeled #7 resulted in a total db loss of -29.83 or -6.52
F.O. side labeled #8 resulted in a total db loss of -30.65 or -6.69
F.O. side labeled #5 resulted in a total db loss of -35.39 or -12.08
F.O. side labeled #12 resulted in a total db loss of -33.77 or -10.46
F.O. side labeled #3 resulted in a total db loss of -34.48 or-11.17


Problem/Changes:
Thursday- finished termination details--clean up.
Then got ready for some ballast testing with Gene Maision.Picked 
the vehicle up with the grove crane and experimented with wieght
versus pitch ratios.-- center of bouyancy  v.s. center of gravity to 
determine how much foam to remove from the foam pack.The rest of the afternoon we  measured the vehicle as requested by Gene.


Solution:
All penitrators on telem can were removed, O rings checked and reinstalled.  Stil cam 2 trigger/Servo rotor penitrator and cable were replaced with MSAJ-4 oil filled cable.. Can internals were dried out, BIW bulkhead to stbd valve pack was removed and reinstalled. New dessicant was installed to can.


Problem/Changes:
Overpressurized Main hydraulic resevoir due to closed return valve when vehicle was powered by HPU on 2/8/97.

Solution:
Replaced bellowfram, suction strainer,  HP filter, and hydaulic oil..

Recommendation:
Open the return valve before powering up on HPU!


Problem/Changes:
Telem water alarm on 2/10/97 due to crushed wire under an O ring on the Depth sensor penitrator.

Solution:
Replaced Depth sensor penitrator and cable with MSAJ-4 penitrator and oil filled cable. Dried internals of Telem can , removed lower penitrator covers to drain water. Reassembled and vacuume tested can for leaks. Can held 15 psi vacuume overnight.

Recommendation:
Vacume test flooded cans before diving again.


Problem/Changes:
Bad bellypack deck cable, went south on 2/7/97.

Solution:
Installed temporary deck cable until replacement is ordered, received and installed.


Problem/Changes:
Start to de-mob vehicle in preparation for a two week maintenence period.Remove term can and package fiber optics to protect while the Pt. Lobos is in drydock.Move vehicle to bay #1 along with all the tools and spare parts to facilitate upgrades and general maintenence.Start to remove the foam pack by enableing the light bar to tilt foward,ie- removing tie wraps and cables ,and any hydralic
lines that would prevent this.


Problem/Changes:
Remove the foam pack for re-structuring -- remove foam to better balance the vehicle.Basically remove 10 cubic  ft.aft  and add foward.Also remove telemetry and fibre optic cans to facilatate wiring clean up.


Problem/Changes:
Start to draw a detailed schematic of the hydraulic system on board of Ventana.Remove and inspect both wandflu valve packs , with the intention of spinning them around to make the flow control needles accessible to the pilots. Start to replumb any flexible hydraulic  with stainless steel hard plumbing where possible.


Problem/Changes:
Start work on reconfiguring the I.F. tray to upgrade the five function manipulator to a seven function.Also a general inspection and clean up.


Problem/Changes:
Inspect and begin a clean up (electrical-video-wiring) of the fiber optic can.


Problem/Changes:
Complete a  the schematic drawing of the hydraulic system aboard ventana.Stephen continues hard plumbing ,plus removes starboard thruster motor and inspects for leaks Replace  motor and shaft seal.Re plumbed swing arm circuit.Tucker starts to rewire the port side wandflu (to make cable longer).


Problem/Changes:
Work is continued on the fiber optic can . Conway eliminates all remaining I.S.E. penetrators and replaces them with new M.S.A.J. penetrators in the telemetry can .Both cans are inspected to remove any extraneous wiring.


Problem/Changes:
Tucker completes wiring of the portside wandflu valve pack ,and starts the rewiring of the starboard wandflu.Order O-ring replacement material for both wandflus(.103-diameter).Stephen continues hard plumbing the vehicle.At the end of the day the starboard wandflu is ready to be installed (sans O-rings).l


Problem/Changes:
Continued progress in the upgrade to both the fiber optic and telemetry cans,as well as the interface tray (donk to dongo).


Problem/Changes:
Continue hard plumbing -thruster seals,portside wandflu,and any other soft line to hard line conversion.O-ring material (.103 dia.) ,for both wandflus should arrive 3/7/97.


Problem/Changes:
Continued progress being made on both cans-Tucker makes up  one end of the new belly pack cable and casts.Also exchange bulkhead plates(for new M.S.A.J. installation) -port manip servo,and port manip feed back.Dawe continues clean up any exteranious wiring in the fiber optic can,as well as upgrading whats left over.


Problem/Changes:
Friday-fabricate mounting bracket for the servo valve pack(donk to dongo upgrade)-also pull off any pieces that have not been anodized and get a shipment ready to go out Monday.Check on O-ring status and reorder for a Monday arrival(wandflu)


Problem/Changes:
Sent off parts to be anodized ,plus had Charles pick up six-  twenty foot sections of one quarter inch tubing.Installed the starboard side  wandflu valve pack,-plus make up O-rings for both wandflus (starboard side installed).Stephen continued his plumbing quest,and the port side wandflu is almost ready(needs O-ring ).T.C. and Stephen discuss and plan on where to tie into the high pressure side of the vehicle to upgrade donks flacid wrist.


Problem/Changes:
Telemetry can wiring clean up and upgrades almost complete,with  Mike doing a final inspection tommarrow.


Problem/Changes:
Conway upon inspecting the transformer  can  found a broken pin in th e BIW connector ,removed and replaced.Stephen continued plumbing the port side wandflu + tested the electrical comp and corrected a pressure leak problem.T.C. continued working on the fibre optic can.


Problem/Changes:
Finished plumbing the starboard wandflu.


Problem/Changes:
Stephen starts to plumb the high pressure line to the wrist rotate in dongo.We move the vehicle into the high bay for a test fit (foam pack)and in the process scratch the lens on the sony camera.Also
recieve the parts back from the plater and installed .

Telemetry can is still in the process of being cleaned up(wiring )with one more B.I.W.connector to be checked and mapped out by Mr.Mike Conway.Fibre Optic  can is rumored to be ready by Monday afternoon.


Problem/Changes:
Rang out wiring from BIW 28 pin connector to/from Fiber Optic can into Telem can.  Found a bare wire on one twisted pair pig tail near bulkhead. Removed wiring to repair.  Also rang out MBARI relay board. Schematics for Telem and Relay board need to be updated.

Solution:
Remove bulkhead connector and repair wires.

Recommendation:
Need to update Telem and Relay Scmatics.


Problem/Changes:
Telem to FO BIW28 bulkhead wireing repairs.  Corrosion behind O ring seal in bulkhead connector.  Possible leak into Telem can.

Solution:
Cleaned connector and replaced all damaged or spliced wires, reterminated all twisted pairs and coax. Insured shrink tuding will not slip by using shrink tubing with adhesive int.  Cleaned bulkhead and sealed threads on connector with PTS pipe seal.


Problem/Changes:
Continued with comping systems and watching for leaks-Tie wrap where needed (tygon tubing thruster seals)Make up pillow blocks as needed to complete plumbing.Rebuild small cylinder for sony main camera.Finish fastening strut for aft end of the foam pack.Fabricate end piece to hold fiberglass shell in place during launch and recovery


Problem/Changes:
Rung out rate valve function control relay board and toolsled cable. Installed reinforcement bracket aft of vehicle( foam pack void.) Mounted new valve pack to mounting brackets, drilled and tapped holes. Replumbed port wandflu water drain line and mains fill. Replumbed return line port wandflu. Finished up telemetry can.


Problem/Changes:
Finish installing servo valve pack(mechanical,not hydraulic)for donk to dongo upgrade-Stephan plumbs pressure and tank return as well as electrical comp.I start hooking up cables-fiber optic can ,check all MSAJ fittings for o-rings and mark when completed.Mike delivered the telemetry can and installed (just mounted on the hinge)--Pump up electrical comp and watch for leaks.


Problem/Changes:
Continued running cables -from both cans.Install new MSAJ fitting in the term can.Install tether ,term can.Make pillow blocks as necessary to complete hydraulic plumbing.Assembled new pitch-yaw up grade to donk(mechanical only).Fired up ventana and watch for smoke.Start bringing up systems.Repolish lens and install in the sony main camera,perge with nitrogen and install new dessicant.Change check valves in the electrical comp. system to 25 psi instead of 10 psi.,comp system and leave over night .Install feed back junction box(mechanically)donk to dongo up grade.


Problem/Changes:
Mike repairs cable --fiber optic to core can.bring up hydraulics(on beluga)and correct any leaks.Recomp electrical comp after correcting minor leaks detected overnight,and let stand to observe for any malfunctions.


Problem/Changes:
Like the Rov nomads we are,we move Ventana back aboard the world famous RV P.T. Lobos.Tools,acessories,the whole kit and kaboodle.We will try a test dive in between C.T.D. cast tomorrow


Problem/Changes:
Test dive in betwwen CTD casts.Depth sensor is not working and we have no sonar.+the electrical compensation system seems to be reaching excessive presuures.


Problem/Changes:
Install sonar head and trouble shoot why we do not have sonar.Fuse replace and it's a runner.T.C. works on the pressure transducer and corrects an I.C. problem-- a 5607 bufffer on the gesout sbs6 .Tucker actuates the hydraulics on the new cylinders for the donk to dongo upgrade.Comp systems and let  stand overnight to observe for leaks.


Problem/Changes:
Scheduled dive had to canceled due to a faulty ic in a ground fault board and a faulty rs 232 to485 converter.Replaced all components and vehicle is up and running.Moved new tool boxes on board and rearranged our tools.Replaced a troubled micro sea cam .Began troubleshooting port manip valve pack. Tested voltage to valve enable / no voltage. Discovered transistor blown on adc board. Transistor replaced.


Problem/Changes:
Removed port arm valve pack from sub. Upon check wiring found servo valves wired incorrectly. White and green tied together, red signal and yellow ground. Reworked wiring to white =signal, yellow = ground and red/ green tied together. Tested all valves hydraulically in both directions. Installed valve pack on sub and made conections to arm. Shortened orange lines to valve pack.
Applied rtv to all pots except swing, and filed shafts on master port arm. Upon testing found that pots still slip. Set pots with epoxy. Calibrated elbow, pitch and yaw in software. No feed back values on swing and shoulder. Tested resistance at both pots (ok) also tested through cable (ok). OK  in telemetry can, needs further investigation. Hydraulic functions on arm were tested on4/16/97. Swing function backwards, so reversed. All connections good. Compped electrics, let stand, replaced o ring on thruster valve pack and compped pack. Bled and compped pots on port arm.


Problem/Changes:
Leaking pitch pot on std arm. Added oring on pot shaft due to resses on bottom late being too deep / no seal could be acheived. Used 2 orings. Removed port swing arm due to exessive leakage on rotary attuator seal. Started to build new arm using new attauator. Not installed on vehicle yet.


Problem/Changes:
Instal Drillsled, moved cameras and lights, repaired stbd manip yaw broken clevis. Telem failure was traced to low curent and low voltage in FO tray power supply.  Worked on port manip master.


Solution:
Removed pivit point shaft and drilled out urathane pot inserts. Gary Burkhart machined flats on round pot shafts. I casted pivit shafts to pot shafts w/ flats with JB Weld epoxy using wax as a mold release on shafts.  Casting was done 4-20 & 22.  Master was reassembled and calibrated.  Bad pot on elbow needs replacing.


Problem/Changes:
Vehicle spins out of control when hydraulics are in full system pressure.

Solution:
Replace Stbd servo valve SN 020 with SN 005, will send out for service, suspect broken spool.  Also replaced Port servo SN 008 with SN 007 and will send SN 008 in for service as well.


Problem/Changes:
Diagnosed faults on power controller board in core can. Removed board for repair. Troubleshot UDI sonar fault. Hardwired head to processor, fault still exists. Both head and processor sent back to UDI on 05/05/97


Problem/Changes:
Supply mounted power supp found to be dead. Port and stb pulnix connectors produced groundfaults when plugged in accoustic flow meter. Tested echo on accoustic flow meter / no  echo found. Reversed stb pulnix serial port to channel #3. Reinstalled mesotech sonar. Found both astrotec laser drivers not working. Replaced vicar 12v power supply that was damaged by short.

Solution:
Mesotech sonar innopp at this time. Replaced reworked power controller board in core can. Moved inncandesant light to a more accessible place.


Problem/Changes:
Vehicle thrusting up when vertical thrusters controlled down.  Suspected a sticking servo valve.

Solution:
Replaced vertical servo valve SN 009 with SN 008.  Servo valve SN 008 was previously controlled the port thruster and was removed at the same time as the starboard servo when troubleshooting vehicle spin problem a couple of weeks ago. Suspect servo SN 008 is working OK.


Problem/Changes:
UDI sonar and processor from Tiburon was installed on Ventana.


Problem/Changes:
Maintenance done 5/13/97 Remove Rexroth Pump, Change filters, adjusted oil level sensor.

Solution:
Rexroth Pump SN 435997 was removed and SN I13873 was installed. 3 micron filter was changed out, suction strainer filter was washed and reinstalled. Replacement pump, SN I13873 had cavitation problems, was removed. Pump SN 435997 was reinstalled and works well.


Problem/Changes:
On dive # 1250 a high pressure drop was noticed. The rexroth pump was changed out. Both the high pressure and suction strainer filters chaged out. On testing the new pump,SN I13873, began cavitating and exessive noise noted. System was bled several times but cavitation still persisted above 2000 psi. Old pump ,SN 435997, was reinstalled and pressures were set to 650 psi and 2850 psi on the high pressure side. Installed both the electric and hydraulic HFSS. Extension tube with tee handle fitted to end of suction line.  We cont to troubleshoot the UDI sonar circuit. Removed the oil level sensor to check adjustment of reed switches. Replaced oil sensor and checked calibration. At approx 1/2 oil volume the med oil alarm came on, although the pressure on the reservoir was at 2psi according to the gauge.

Solution:
UDI sonar is now powered by its own isolated power supply.  Suspect power surges were blowing fuses in B&B data converters. The power supply for the UDI was temporarily installed using two DC to DC converters wired in series, one 24 to 12 volt, the other 24 to 15, supplying a total of 27 volts.

Recommendation:
Send out Rexroth Pump SN I13873 for service, order larger micron filter for suction strainer and source a 3micron HP filter with a 25gpm rating or higher to prevent restrictions on supply to the 25gpm rexroth pump.


Problem/Changes:
Stbd manip swing servo valve was nulled to correct for arm swinging inboard when enabled prior to be picked up.  Swing ram was also removed to repair hyd. leak, caused by missing O ring. Also calibrated stbd manip yaw.

Solution:
Port manip elbow ram was removed from mounts and bled for air. High torque wrist rotate was replumbed to D4 , which is powered by a Wandfluh rate valve without a cross piloted check valve.  The cross piloted check valves on other rates prevent the pilot valve on the wrist rotate from centering and closing.

Recommendation:
Replace valve pack #3, that has hydroforce valves, with Wandfluh valves.


Problem/Changes:
Maintenance performed on 5/28/97. Flushed motor coupler several times and bleed air out. Repaired cuts in teather jacket from bullet collar two blocking with 680 meters of teather out. Traced down electrical comp leak to main resevoir.

Solution:
Teather had several cuts in the outter jacket which did not penetrate the kevar layer. The teather was sanded and cleaned, cablemax was applied and wrapped with tape.  Electrical comp leaks to mains were traced down to the 10psi  check valve from the servo valve packs to the main resevoir. This check valve was replaced with a 25 psi check valve and the remainder of the check valves in the system were removed.  A 25 psi check valve was also reinstalled from the port rate pack to the main resevoir.

Recommendation:
Replace all check valves from electrical housings to main resevior with 25 psi checks.


Problem/Changes:
After a morning meeting ,it was determined that the Rex Roth main motor should be replaced.Also the microseacams are not operational and need to diagnosed .Swing arm parts need anodizing and paint.Also need to work a drawing.

Solution:
Stephen annd Mike exchange the Rex Roth main hyd. motor.Run on deck .No leaks .Tucker replace Stc card  to fix video problems and send off parts to be plated,paint cylinder.T.C. smoozes with the Japanese about a new camera.Also start wor

Recommendation:
k on the portside  manipulator(soft ware -adjustments),and servo valve exercising.


Problem/Changes:
Nulled all thruster servos including spare. Tested bolt on thruster. Tested all spare volvo thruster motors and spare axial motor that was replaced on vehical march 1997 maint period. Results as follows. # 1 = 12.9 gpm. # 2 = 12.8 gpm. # 3 = 13.2 gpm # 4 = 12.4 gpm. Axial motor = 13.2 gpm. At this point no comparison can be made against manufacturers specs. A tachometer is being ordered to opperate with buluga h.p.u. Preparation of spare umbilical for a retermination. Ready to cast bullit ( cast on order ). Fixed blown hose on drawer on vehical. Tyraped hydraulic lines on port manip. Tested port manip. Mapped wrist circuit in software to master controller using detritus # 4.


Problem/Changes:
msaj 9 science  connector on tel can configured for two serial ports.tested and found operational.


Problem/Changes:
Start by pouring the bullet(tether).Then install portside swing arm.Also investigate the main rexroth pump and servos(loss of pressure).Empty A.P.U. and refill with new oil and filters.Finish configuring the vehicle and test  for tommarrow's dive.Kevin installs a new MSAJ in the core can for the glue gun.Stephen Changes the filters in the bellafram  and output side of the rexroth main pump.Also Kevin fixed the serial port for the CTD.


Problem/Changes:
25 gpm servo valve inop. Sent to THD hydraulics Texas for repair. Spool was found rusty, water in valve, moderate contamination, receiver was worn and jet cap worn. VALVE # SN:009

Solution:
Tested 06/09/97 . Disassembled entire valve. Cleaned and inspect all parts. Replace o rings. Replace filters. Replace receiver and jet cap. Reassemble and calculate valve. Cycle and test.


Problem/Changes:
Dissassembled the upper pan and tilt and rebuilt as needed to eliminate excessive play in the mount.Re installed the port side swing arm and re plumbed to the spare valve  in the port  side wandflu to power the swing arm.Sled change---Good to go!


Problem/Changes:
Started by filling the a.p.u with some fresh oil.Then I changed some light cables so that the lights would match the G.U.I.Reinstall the servonious rotor and port swing arm.Also remount lasers.Then me and Kevin worked on the corecan /HFSS power supply to try and correct the ground fault problem.Lost telemetry 5:30 PM fri afternoon.Traced the problem  to the PCO card in the interface tray,replaced and restored telemetry .

Recommendation:
After much research ,I believe the problem with the HFSS is in the motor.I would recommend  a flush and  new brushes.


Problem/Changes:
We started the day by removing the super harp and it's pan and tilt.
We noticed that the bellafram for the main hyd.res.was torn,but not leaking,so we replaced .Also replaced the filter after finding lots of metal shaveings.Then in the after noon we lost telemetry.We traced the problem to a power source in the memory card and replaced ,restoring telemetry.


Problem/Changes:
Started the day by dailing in the potentiometers on both arms ,and in the process found a faulty servo valve in the shoulder function ,portside manipulator.Replaced and test.Also drained the comp oil supply from down below and restocked as the previous supply was contaminated by water.Changed the filter to the A.P U as well as the high pressure side of the vehicle.Staged and loaded all our spares for the trip to eel river.Test the heat flow meter.


Solution:
move frankin and rexroth aft 12 in. move core can up into void left by the foam pack modification in mar 97


Problem/Changes:
undocumented confusing video suite lay out in forpeak.

Solution:
complete rewire of video system, move dynair up and forward to chain locker bulkhead,bring spare I/O to bulkhead mounts,bulkhead mount video in/out of forpeak.


Solution:
remove all un used wiring in the room pull non-used wire out of the over head. attempt to document what is left.


Problem/Changes:
move video broadcast gear into a stand alone rack to clear the way for a new science station.


Problem/Changes:
prepare for termination of new 7000 ft tether.

Solution:
fiber optic whip relocated and term can parts are completed. splicing the ST cons on both ends is all that remains.


Solution:
Open port rate can and exercise valve manually


Problem/Changes:
Selenoid and servo valves have been sticking since last maintenance week in Dec.00

Solution:
Pull down main comp and clean.  Replaced screen and high pressure filters.

Recommendation:
Keep watch and see if more problems occur


Problem/Changes:
HDTV Pan and tilt Malfunction in all 3 planes (PTS)

Solution:
After flushing  feedback J-box of small amount of water and no success.
Stratton found a boken wire fixed in P&TfeedbackJ-Box. (Brown wire, Common?)


Problem/Changes:
Ground faults on upper pan and tilt.  Bulkhead connector on Telem can found to be bad.  Pins weakend to the point of breaking.

Recommendation:
Clean and inspect connectors at least at every quaterly maint. Period


Problem/Changes:
Loss of Hydraulic comp at 500 meters.  Elec comp at 25psi and drop to 15psi when main hydraulics were shut down.  Oil leakage out the pressure relief valve on the Orion manipulator valve pack.


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