AFT Cabin Duct Temperature Sensor Fault

TASK 21-63-00-810-811-A
AFT Cabin Duct Temperature Sensor Fault

1. Possible Causes

TEMP SENSOR AFT CAB DUCT [17HK]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-63-00-710-004	Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216302
ASM 216303
AMM 21-63-15-000-001	Removal of the Duct Temperature Sensors
AMM 21-63-15-400-001	Installation of the Duct Temperature Sensors

3. Fault Confirmation
Subtask 21-63-00-710-071-A ** ON A/C NOT FOR ALL

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

NOTE: If a fault is detected, the ZC gives a fault code for shop maintenance in addition to the related CFDS message(s). For detailed information see the applicable Page Block 301.

Subtask 21-63-00-710-071-B ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 21-63-00-810-067-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message TEMP SENSOR AFT CAB DUCT:

replace the TEMP SENSOR AFT CAB DUCT [17HK] (referred to as SENSOR (17HK)) AMM 21-63-15-000-001 and AMM 21-63-15-400-001.

(1) If the fault continues:

do a check and repair the wiring if necessary between:
SENSOR (17HK) connector A/E and ZC (8HK) connector AA/10A,
SENSOR (17HK) connector A/F and ZC (8HK) connector AA/10B,
SENSOR (17HK) connector A/C and ZC (8HK) connector AA/10K,
SENSOR (17HK) connector A/D and ZC (8HK) connector AA/10J,
SENSOR (17HK) connector A/A and GND ASM 216303.

Subtask 21-63-00-810-067-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message TEMP SENSOR AFT CABIN DUCT(17HK):

replace the TEMP SENSOR AFT CAB DUCT [17HK] AMM 21-63-15-000-001 and AMM 21-63-15-400-001.

(1) If the fault continues:

do a check and repair the wiring ASM 216302 from:
the SENSOR (17HK) to the ACSC2 (57HH) and,
the SENSOR (17HK) to ground.

Subtask 21-63-00-710-072-A

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

5. Close-up
Subtask 21-63-00-860-060-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:25:01 UTC