Pack 1 P/BSW Fault
TASK 21-51-00-810-825-A
Pack 1 P/BSW Fault
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 21-51-00-710-086-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 21-51-00-810-102-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:24:49 UTC
Pack 1 P/BSW Fault
1. Possible Causes
- P/BSW-AIR COND/PACK 1 [7HB]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 215102 | |
| AMM 21-61-00-710-001 | Operational Test of the Pack Temperature-Control System |
Subtask 21-51-00-710-086-A ** ON A/C NOT FOR ALL 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:
Subtask 21-51-00-720-060-A ** ON A/C NOT FOR ALL - do a check of the P/BSW-AIR COND/PACK 1 [7HB] and replace it if necessary ASM 215102.
- 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).
B. Do the test as given in the Para. 3.A.