EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-15-00
ALL ú
ú 02 Page 104
ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
~............................................................................... | TROUBLE | PROBABLE CAUSE | ISOLATION PROCEDURE | REMEDY | ................................................................................. | |Fluid shrinkage | (AMM 12-12-00/301)| | | |during cold| | | | |conditions| | | | | | | | | Hydraulic |Hydraulic fluid | See the steps for | Use the correct| | fluid comes |transfer between | trouble shooting | procedure for| | out of the |systems A and B | fluid transfer. | operating| | reservoir |or B and A | | the hydraulic| | vent line | | | powered systems| | | | | or replace the| | | | | bad parts.| | | | | | | |Fluid quantity | Do the Inspection | Replace the| | |indicator on the | procedure for the fluid | fluid quantity| | |reservior | quantity indicator | indicator| | | | (AMM 29-33-12/601). | (AMM| | | | | 29-33-12/401).| | | | | | | Hydraulic |High pressure | Depressurize and | Replace| | fluid |leakage through | disconnect system A | brake| | transfer from brake shuttle| | pressure line from | shuttle| | system B to A valve/s| | each of the four | valve| | | | brake shuttle valve| | | | | lines. Pressurize| | | | | system B. Leakage| | | | | from any brake| | | | | shuttle valve is| | | | | causing the problem.| | | | | | | | | | | | | |Low pressure | Can occur on airplanes | Consider| | |(return system) | prior to incorporation | incorporating| | |leakage through | of SB 737-29-1065, due | the balance| | |brake shuttle | to differences between | line| | |valve (On | reservoir pressures. | modification| | |airplanes not | | (SB| | |incorporating | | 737-29-1065)| | |the balance line| | | | |modification,| | | | |SB 737-29-1065)| | | | | | | | | | | | | | |Incorrect | Fluid transfer caused by | AMM| | |parking brake | setting brakes using | 12-12-00/301| | |pre-start | system B and releasing| | | |procedure | brakes using system A while| | | | | system B is depressurized| | | | | | |
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-15-00
ALL ú
ú 01 Page 105 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
~............................................................................... | TROUBLE | PROBABLE CAUSE | ISOLATION PROCEDURE | REMEDY | .................................................................................
| Incorrect| | Fluid transfer is caused | Use correct|
| thrust| | when left thrust reverser | procedures|
| reverser| | is actuated by standby | for operating|
| actuation| | hydraulic system | thrust|
| | | | reverser|
| | | | (AMM 29-15-00).|
| | | | Make sure no|
| | | | fluid transfers|
| | | | when operating|
| | | | thrust|
| | | | reverser by|
| | | | normal|
| | | | procedure|
| | | | |
| Defective| | If indicator is white, | Correct wiring|
| components| | verify continuity of wires | hook-up as|
| supplying| | between M1190 card (pins | necessary|
| power to| | 27 and 28) and engine No. 1| |
| landing gear| | N2 connector D552 (pins 4 | |
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