-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 29-23-00-710-002 AMM 29-23-41-000-001 AMM 29-23-41-400-001 AMM 29-23-51-000-001 AMM 29-23-51-000-002 AMM 29-23-51-400-001 AMM 29-23-51-400-002
3. Fault Confirmation
__________________ R A. Do these tests:
Operational Check of PTU Green to YellowRemoval of the Green/Yellow Power Transfer Unit 1088GMInstallation of the Green/Yellow Power Transfer Unit 1088GMRemoval of the Solenoid Valve 1012GL of the Power Transfer UnitRemoval of the Solenoid Valve 3012GL of the Power Transfer UnitInstallation of the Solenoid Valve 1012GL of the Power Transfer UnitInstallation of the Solenoid Valve 3012GL of the Power Transfer Unit
R (1) Do a check of the internal leakage of the Power Transfer Unit (PTU)
R (Ref. AMM TASK 29-00-00-280-004).

R (2) If the internal leakage of the PTU is in the permitted limits:
R - do a functional check to monitor the internal leak rate of the
R Yellow and Green hydraulic systems (Ref. AMM TASK 29-10-00-220-R 001).

R (3) If the internal leak rate of the Yellow and Green hydraulic systems
R is in the permitted limits:
R
R - do the operational test of the PTU (Ref. AMM TASK 29-23-00-710-
002). R R - look for external leakage of the Green hydraulic system.
 4. Fault Isolation
_______________

 **ON A/C 001-049, 051-058, 101-101,
 A. If there is no external leakage and the pressure in the Green hydraulic system was less than 2100 psi during the operational test of the PTU:
 - replace the PTU-G/Y (1088GM) (Ref. AMM TASK 29-23-41-000-001) and (Ref. AMM TASK 29-23-41-400-001).
 (1) If the fault continues:
 - replace the SOL VALVE-PTU, G (1012GL) (Ref. AMM TASK 29-23-51-000-001) and (Ref. AMM TASK 29-23-51-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞29-23-00∞∞∞∞∞∞∞∞∞∞Page 214
 Aug 01/05 CES

 (2) If the fault continues:

 - replace the PRIORITY VALVE-G (1064GM) (Ref. AMM TASK 29-11-33-000-001) and (Ref. AMM TASK 29-11-33-400-001).

 (3) If the fault continues:

 - replace the SOL VALVE-PTU, Y (3012GL) (Ref. AMM TASK 29-23-51-000-002) and (Ref. AMM TASK 29-23-51-400-002).

 (4) If the fault continues:

 - replace the PRIORITY VALVE-Y (3064GM) (Ref. AMM TASK 29-13-33-000-001) and (Ref. AMM TASK 29-13-33-400-001).

 (5) If the fault continues:

 - replace the CHECK VALVE-ENG 1 PUMP DELIVERY, G (1050GM) (Ref. AMM TASK 29-11-36-000-001) and (Ref. AMM TASK 29-11-36-400-001).

 (6) If the fault continues:

 - replace the CHECK VALVE-ENG 2 PUMP DELIVERY, Y (3050GM) (Ref. AMM TASK 29-13-36-000-001) and (Ref. AMM TASK 29-13-36-400-001).
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
 A. If there is no external leakage and the pressure in the Green hydraulic system was less than 2100 psi during the operational test of the PTU:
 - replace the PTU-G/Y (1088GM) (Ref. AMM TASK 29-23-41-000-001) and (Ref. AMM TASK 29-23-41-400-001).
 (1) If the fault continues:

 - replace the MANIFOLD,PTU (1113GM) (Ref. AMM TASK 29-11-15-000-001) and (Ref. AMM TASK 29-11-15-400-001).

 (2) If the fault continues:

 - replace the MANIFOLD,PTU (3015GM) (Ref. AMM TASK 29-13-15-000-001) and (Ref. AMM TASK 29-13-15-400-001).

 (3) If the fault continues:

 - replace the CHECK VALVE-ENG 1 PUMP DELIVERY, G (1050GM) (Ref. AMM TASK 29-11-36-000-001) and (Ref. AMM TASK 29-11-36-400-001).

 (4) If the fault continues:

 - replace the CHECK VALVE-ENG 2 PUMP DELIVERY, Y (3050GM) (Ref. AMM TASK 29-13-36-000-001) and (Ref. AMM TASK 29-13-36-400-001).
 **ON A/C ALL
 B. Do the test as given in para. 3. to make sure that the operation is correct.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞29-23-00∞∞∞∞∞∞∞∞∞∞Page 215
 Aug 01/05 CES

 TASK 29-23-00-810-805

 Continuous Running of the Power Transfer Unit (PTU) After Start in Sequence of Engine 1 and Engine 2
 1. Possible Causes
_______________

 - SOL VALVE-PTU, Y (3012GL)
　
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