- if the test gives the maintenance message OUTFLOW VALVE ELEC 1 (52) or,
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(2) If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT gives the maintenance message which follows,
- OUTFLOW VALVE ELEC 1 (52) but the test cannot confirm the fault:
- replace the VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 1 (referred to as OFV (10HL)) (Ref. AMM TASK 21-31-51-000-002) and (Ref. AMM TASK 21-31-51-400-002).
NOTE : The electronic module 1 is connected to the electrical
____ connector 10HL-A.
(3) If the fault continues:
- swap the CPC 1 (11HL) and the CPC 2 (12HL) (Ref. AMM TASK 21-31-34-000-001) and (Ref. AMM TASK 21-31-34-400-001).
(a) If the fault moves with the CPC 1:
- swap back the CPC 1 (11HL) and the CPC 2 (12HL) (Ref. AMM TASK 21-31-34-000-001) and (Ref. AMM TASK 21-31-34-400-001) and,
- replace the CONTROLLER-CABIN PRESSURE 1 (11HL) (Ref. AMM TASK 21-31-34-000-001) and (Ref. AMM TASK 21-31-34-400-001).
(b) If the fault does not move with the CPC 1:
- swap back the CPC 1 (11HL) and the CPC 2 (12HL) (Ref. AMM TASK 21-31-34-000-001) and (Ref. AMM TASK 21-31-34-400-001).
1_ Do a check and repair the wiring from the:
- OFV connector (10HL-A) pins R, P, N, and M to the CPC 1
connector (11HL-AA) pins 7A, 8A, 9A, and 10A (Ref. ASM 21-
31/02).
2_ Do a check of the earthing resistance at the return ground
connections (Ref. AMM TASK 21-31-00-760-001) on:
- the CPC 1 connector 11HL-AC pin 2 and on,
- the electronic module 1 connector 10HL-A pin J.
NOTE : The resistance value must be smaller than 20 m.ohms.
____
B. Do the test as given in the Para. 3.A.
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TASK 21-31-00-810-832
Outflow Valve Electronic Module 2 Fault (52)
1. Possible Causes
_______________
- CONTROLLER-CABIN PRESSURE 2 (12HL)
- VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 2
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-31-00-710-002 Operational Test of the Pressure Control and Monitoring
AMM 21-31-00-760-001 Resistance Check of the Return Ground Connections -Cabin Pressure Controller (CPC) 1 (11HL) and 2 (12HL) and the Electronic Modules 10HL-1 and 10HL-2
AMM 21-31-34-000-001 Removal of the Cabin Pressure Controller (11HL,12HL) AMM 21-31-34-400-001 Installation of the Cabin Pressure Controller (11HL,12HL) AMM 21-31-51-000-002 Removal of the Outflow Valve (10HL) - Electronics Module 10HL-1 (10HL-2) AMM 21-31-51-400-002 Installation of the Outflow Valve (10HL) -Electronics Module 10HL-1 (10HL-2) ASM 21-31/02
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the pressure control and monitoring system (Ref. AMM TASK 21-31-00-710-002).
4. Fault Isolation
_______________
A. Test Results
(1) If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT gives the maintenance message which follows,
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