Loss of the Power Supply of the Bleed Pressure-Regulator Valve of the Engine 1

TASK 36-11-00-810-853-A
Loss of the Power Supply of the Bleed Pressure-Regulator Valve of the Engine 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-00-00-810-803-A	Circuit Breaker Tripped and/or C/B TRIPPED Warning
ASM 361101
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC

3. Fault Confirmation
Subtask 36-11-00-710-150-A ** ON A/C NOT FOR ALL

A. Not applicable.

4. Fault Isolation
Subtask 36-11-00-865-057-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12

Subtask 36-11-00-810-101-A ** ON A/C NOT FOR ALL

B. If the fault symptom is identified by the maintenance message CHECK PRESS REG V PWR SPLY:

(1) If the circuit breaker (3HA1) is closed:

(a) If there is 28VDC:

(b) If there is no 28VDC:

1 If there is no ground:

2 If there is ground:

Do a check of the wiring between the BMC1 pin AA/8A and the circuit breaker (3HA1).

a If there is no continuity:

b If there is continuity:

(2) If the circuit breaker (3HA1) is open:

(a) If the fault continues:

1 If the fault continues:

Subtask 36-11-00-710-151-A ** ON A/C NOT FOR ALL

C. After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:33:45 UTC