ECB receives no Data from the ECS

TASK 21-63-00-810-830-A
ECB receives no Data from the ECS

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-32-00-810-934-A	Failure of the Digital Links
AMM 21-63-00-710-004	Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216303
AMM 49-00-00-710-001	Self-Test of the ECB
ASM 496101
AMM 49-61-34-000-001	Removal of the Electronic Control Box (ECB) (GTCP 36-300)
AMM 49-61-34-400-001	Installation of the Electronic Control Box (ECB) (GTCP 36-300)

3. Fault Confirmation
Subtask 21-63-00-710-109-A ** ON A/C NOT FOR ALL

A. Do the Self Test of the ECB AMM 49-00-00-710-001.

NOTE: Make sure that the circuit breakers 1HK, 2HK, 3HK and 4HK are closed during the test.

Subtask 21-63-00-710-109-D ** ON A/C NOT FOR ALL

A. Do a read out of the APU Last Leg Report.

4. Fault Isolation
Subtask 21-63-00-810-113-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message NO DATA FROM ECS or NO PACK DATA FROM ECS:

do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.

(1) If the test gives a different maintenance message, do the related trouble shooting procedure.
(2) If the fault continues:

(3) If the fault continues:

do a check and repair the wiring of the signal ARINC 429 XTR EXT from the ZC (8HK) to the ECB (59KD) ASM 216303 and ASM 496101.

(4) If the fault continues:

Subtask 21-63-00-810-113-E ** ON A/C NOT FOR ALL

A. If the APU Last Leg Report gives the maintenance message NO DATA FROM ECS (FCN 106):

do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.

(1) If the test gives a different maintenance message, do the related trouble shooting procedure.
(2) If the fault continues:

(3) If the fault continues:

do a check and repair the wiring of the signal ARINC 429 XTR EXT from the ACSC1 (47HH) to the ECB (59KD) ASM 216303 and ASM 496101.

(4) If the fault continues:

Subtask 21-63-00-710-110-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 21-63-00-860-079-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:25:03 UTC