- after the subsequent flight, make sure that the fault does not continue.
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Aug 01/02R
CES
TASK 21-31-00-810-829
Outflow Valve Electronic Module 1 Fault (04)
1. Possible Causes
_______________
- CONTROLLER-CABIN PRESSURE 1 (11HL)
- VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 1
- RELAY-AUTO MODE DRIVE SHUT OFF (17HL)
- PUSHBUTTON SWITCH-CABIN PRESS/MODE SEL/AUTO (14HL)
- 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 21-31/01
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. If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT, and/or the test gives the maintenance message which follows,
- OUTFLOW VALVE ELEC 1 (04):
- 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).
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NOTE : The electronic module 1 is connected to the electrical connector
____
10HL-A.
(1) If the fault continues:
- do a check of the RELAY-AUTO MODE DRIVE SHUT OFF (17HL) and replace it if necessary (Ref. ASM 21-31/01).
(2) If the fault continues:
- do a check of the PUSHBUTTON SWITCH-CABIN PRESS/MODE SEL/AUTO (14HL) and replace it if necessary, (Ref. ASM 21-31/01).
(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).
- 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) pin K to the CB (1HL),
- OFV connector (10HL-A) pin L to the CPC 1 connector (11HL-AA) pin 15D,
- OFV connector (10HL-A) pins G and J to the GND,
- 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 21-31/01) and, (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 must be smaller than 20 m.ohms.
____
B. Do the test as given in the Para. 3.A.
「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 ∞∞21-31-00∞∞∞∞∞∞∞∞∞∞Page 263
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