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 |  transfer|  |  and 5) |  |
 |  valve|  |  |  |
 |  |  |  Do the Test for the M1190  |  Replace the|
 |  |  |  Circuit Card (Engine speed  |  M1190 circuit|
 |  |  |  Detector)  |  card if the|
 |  |  |  (AMM 32-09-20/401).  |  test fails.|
 |  |  |  |  |
 |  |  |  Do the Test for the M1112  |  Replace the|
 |  |  |  Circuit Card (Gear Transfer|  M1112 circuit|
 |  |  |  Valve Control)  |  card if the|
 |  |  |  (AMM 32-09-20/401).  |  test fails.|
 |  |  |  |  |
 |  Defective|  |  Run landing gear transfer  |  Replace landing|
 |  landing gear|  |  valve test (AMM 32-31-71)  |  gear transfer|
 |  transfer valve|  |  |  valve if test|
 |  |  |  |  fails|
 |  |  |  |  |

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 ~............................................................................... | TROUBLE | PROBABLE CAUSE | ISOLATION PROCEDURE | REMEDY | ................................................................................. | |Cross connect-| Operate rudder with one | Correct return| | |ion of return | hydraulic system only. | line| | |hoses at rudder | Watch for changes in the | connections| | |PCU | reservoir fluid quantity | at the rudder| | | | | PCU| | Hydraulic |High pressure | Depressurize and | Replace| | fluid |leakage through | disconnect system B | brake| | transfer from brake shuttle| | pressure line from | shuttle| | system A to B valve| | brake shuttle valve. | valve| | | | Pressurize system A.| | | | | Shuttle valve leakage| | | | | is causing problem.| | | | | | | | |Check valve | | Replace check| | |leakage | | valves at| | | | | alternate anti| | | | | skid control| | | | | valve and check| | | | | valve at brake| | | | | metering return| | | | | line| | | | | | | |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 A and releasing| | | |procedure | brakes using system B while| | | | | system A is depressurized| | | | | | | | |Cross connect-| Operate rudder with one | Correct return| | |ion of return | hydraulic system only. | line| | |hoses at rudder | Watch for changes in the | connections| | |PCU | reservoir fluid quantity | at the rudder| | | | | PCU| | | | | |
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-15-00
 ALL ú

 ú 02 Page 107 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 | .................................................................................
 |  Hydraulic  Fluid transfer|  |  See above instructions |  |
 |  fluid comes  |  |  for trouble shooting |  |
 |  out of the  |  |  fluid transfer |  |
 | reservoir  |  |  |  |
 |  vent line/  Over-servicing|  |  (AMM 12-12-00/301) |  |
 |  drain mast  because of fluid|  |  |  |
 |  shrinkage|  |  |  |
 |  |  |  |  |
　
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