Pack 2 Outlet Temperature Sensor Fault

TASK 21-61-00-810-831-A
Pack 2 Outlet Temperature Sensor Fault

1. Possible Causes

SENSOR-PACK OUTLET TEMP [34HH]
wiring
P2 CHECK VALVE TRIM AIR [19HM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System
ASM 216102
AMM 21-61-15-000-001	Removal of the Pack Outlet - Temperature Sensors
AMM 21-61-15-400-001	Installation of the Pack Outlet - Temperature Sensors
AMM 21-63-42-210-001	Detailed Visual Inspection of Trim-Air Check-Valves Flappers for Condition and Operation

3. Fault Confirmation
Subtask 21-61-00-710-110-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: If a fault is detected, the PC gives a fault code for shop maintenance in addition to the related CFDS message(s) (refer to TSM chapter 21-63-00, page block 301).

Subtask 21-61-00-710-110-B ** 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 21-61-00-810-123-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message P2 OUTLET TEMP SENSOR:

replace the SENSOR-PACK OUTLET TEMP [34HH] (referred to as SENSOR (34HH)) AMM 21-61-15-000-001 and AMM 21-61-15-400-001.

(1) If the fault continues:

do a check and repair the wiring between:
SENSOR (34HH) connector A/C and PC 2 (27HH) connector AB/12A,
SENSOR (34HH) connector A/B and PC 2 (27HH) connector AB/12B,
SENSOR (34HH) connector A/A and PC 2 (27HH) connector AB/11D ASM 216102.

(2) If the fault continues:

do a visiual inspection of the trim-air check-valve flappers AMM 21-63-42-210-001, and replace this valve if nessesary.

Subtask 21-61-00-810-123-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message P2 OUT TEMP SENSOR(34HH):

replace the SENSOR-PACK OUTLET TEMP [34HH] AMM 21-61-15-000-001 and AMM 21-61-15-400-001.

(1) If the fault continues:

do a check and repair the wiring ASM 216102 from:
the SENSOR (34HH) to the ACSC2 (57HH) and,
the SENSOR (34HH) to ground.

(2) If the fault continues:

do a visual inspection of the P2 CHECK VALVE TRIM AIR [19HM] flappers AMM 21-63-42-210-001, and replace this valve if nessesary.

Subtask 21-61-00-710-111-A

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

5. Close-up
Subtask 21-61-00-860-080-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:24:54 UTC