AFT Cargo-Compartment Temperature-Selector Function Fault

TASK 21-43-00-810-806-A
AFT Cargo-Compartment Temperature-Selector Function Fault

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 214302
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System

3. Fault Confirmation
Subtask 21-43-00-710-055-A ** ON A/C NOT FOR ALL

A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.

NOTE: The ZC (8HK) also monitors the cargo compartment heating system.

Subtask 21-43-00-710-055-D ** ON A/C NOT FOR ALL

A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.

4. Fault Isolation
Subtask 21-43-00-810-055-A

A. If the test gives the maintenance message AFT TEMP SELECTOR:

(1) If the fault continues:

do a check and repair the wiring between:
the SELECTOR (15HC) pin 4 and ACHC (10HC) AB/3A,
the SELECTOR (15HC) pin 7 and ACHC (10HC) AB/2A,
the SELECTOR (15HC) pin 2 and ACHC (10HC) AB/1A,
the SELECTOR (15HC) pin 8 and GND ASM 214302.

Subtask 21-43-00-710-067-A

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

5. Close-up
Subtask 21-43-00-860-055-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:24:45 UTC