Pack 1 P/BSW Fault

TASK 21-51-00-810-825-A
Pack 1 P/BSW Fault

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 215102
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System

3. Fault Confirmation
Subtask 21-51-00-710-086-A ** 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 21-51-00-810-102-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message PACK P-B(7HB) / WIRING:

do a check of the P/BSW-AIR COND/PACK 1 [7HB] and replace it if necessary ASM 215102.

(1) If the fault continues:

do a check and repair the wiring ASM 215102 from:
the CONT-AIR COND SYSTEM 1 (47HH) to the
PUSHBUTTON SWITCH-AIR COND/PACK 1 (7HB).

Subtask 21-51-00-720-060-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:24:49 UTC