Outflow Valve Fault (05), (11), (24), (25), (26), (29), (60)

TASK 21-31-00-810-807-A
Outflow Valve Fault (05), (11), (24), (25), (26), (29), (60)

1. Possible Causes

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 21-31-51-000-001	Removal of the Outflow Valve (From Inside)
AMM 21-31-51-000-003	Removal of the Outflow Valve (10HL) - Auto Motor 10HL-3 (10HL-4)
AMM 21-31-51-000-005	Removal of the Outflow Valve - Feedback Assembly 10HL-6
AMM 21-31-51-000-006	Removal of the Outflow Valve (From Outside)
AMM 21-31-51-400-001	Installation of the Outflow Valve (From Inside)
AMM 21-31-51-400-003	Installation of the Outflow Valve (10HL) - Auto Motor 10HL-3 (10HL-4)
AMM 21-31-51-400-005	Installation of the Outflow Valve - Feedback Assembly 10HL-6
AMM 21-31-51-400-006	Installation of the Outflow Valve (From Outside)

3. Fault Confirmation
Subtask 21-31-00-710-056-A

A. Test
(1) Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.

4. Fault Isolation
Subtask 21-31-00-810-061-A

A. If one of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT, CLASS 3 FAULTS and/or the test gives one of the maintenance messages which follow,

OUTFLOW VALVE (05),
OUTFLOW VALVE (11),
OUTFLOW VALVE (24),
OUTFLOW VALVE BLOCKED (29) or,
OUTFLOW VALVE (60):
replace the VALVE-OUTFLOW (10HL), AUTO MOTOR 1 AMM 21-31-51-000-003 and AMM 21-31-51-400-003.

(1) If the fault continues:

Subtask 21-31-00-810-109-A

B. Test Result

NOTE: This procedure is only applicable for Outflow Valve Part Numbers 9023-15703 and previous.

(1) If the test gives the maintenance message,
OUTFLOW VALVE (25), or
OUTFLOW VALVE (26):

replace the VALVE-OUTFLOW (10HL), FEEDBACK ASSEMBLY AMM 21-31-51-000-005 and AMM 21-31-51-400-005.

Subtask 21-31-00-810-110-A

C. Test Result

NOTE: This procedure is only applicable for Outflow Valve Part Number 20790-01AA and onwards.

(1) If the test gives the maintenance message,
OUTFLOW VALVE (25), or
OUTFLOW VALVE (26):

Subtask 21-31-00-710-065-A

D. Do the test as given in the Para. 3.A.

5. Close-up
Subtask 21-31-00-860-056-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:24:41 UTC