CPC 1 receives no Data from the FMGS

TASK 21-31-00-810-812-A
CPC 1 receives no Data from the FMGS

1. Possible Causes

PRESS CONT 1 [11HL]
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
ASM 213103
AMM 21-31-34-000-001	Removal of the Cabin Pressure Controller
AMM 21-31-34-400-001	Installation of the Cabin Pressure Controller
AMM 22-96-00-710-001	Operational Test of the AFS

3. Fault Confirmation
Subtask 21-31-00-710-072-A

A. test
(1) Do a read-out of the CLASS III FAULT REPORT of the cabin pressure-control system 1.

NOTE: If a fault is detected, the CLASS III FAULT REPORT of the CPC shows a fault code for shop maintenance in addition to the related CFDS message(s). For detailed information see the applicable Page Block 301.

(2) Start the Flight Management System (FMS).
(3) Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.

4. Fault Isolation
Subtask 21-31-00-810-079-A

A. If the test with the CPC 1 (11HL) gives the maintenance message NO DATA FROM FMGS 1 (54):

swap the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.

(1) If the fault moves with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
replace the PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.

(2) If the fault does not move with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
do the operational test of the AFS AMM 22-96-00-710-001.

(a) If the test gives a different maintenance message, refer to the Fault Symptom List.
(b) If the fault continues:

do a check and repair the wiring of the signal ARINC 429 OUT from the FMGC 1 (1CA1) to the CPC 1 (11HL) ASM 213103.

Subtask 21-31-00-810-080-A

B. If the test with the CPC 1 (11HL) gives the maintenance message NO DATA FROM FMGS 2 (55):

swap the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.

(1) If the fault moves with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
replace the PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.

(2) If the fault does not move with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL) AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
do the operational test of the AFS AMM 22-96-00-710-001.

(a) If the test gives a different maintenance message, refer to the Fault Symptom List.
(b) If the fault continues:

do a check and repair the wiring of the signal ARINC 429 OUT from the FMGC 2 (1CA2) to the CPC 1 (11HL) ASM 213103.

Subtask 21-31-00-710-073-A

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

5. Close-up
Subtask 21-31-00-860-061-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:24:42 UTC