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:
_
-repair the above wiring. b If there is continuity:
_ -replace the circuit breaker (3HA1).
(2) If the circuit breaker (3HA1) is open:
-close the circuit breaker.
(a) If the circuit breaker trips:
-replace the BMC-1 (1HA1). 1 If the fault continues:
_
-do a check for a short to ground at the wiring between the BMC1 pin AA/8A and the circuit breaker (3HA1).
a If there is a short to ground:
_
-repair the related wiring. b If there is no short to ground:
_ -replace the C/B-BLEED VLV ENG 1 (3HA1).
(b) If the circuit breaker stays closed and the fault continues:
-replace the BMC-1 (1HA1).
C. After the subsequent flight, make sure that the fault does not continue.
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--Feb 01/05R ---CES -
Loss of the Power Supply of the Bleed Pressure-Regulator Valve of the Engine 2
1. Possible Causes
_______________
-BMC-2 (1HA2)
-
wiring between the BMC2 pin AB/1B and the ground terminal
-
wiring between the BMC2 pin AA/8A and the circuit breaker (3HA2)
-C/B-AIR BLEED/ENG 2/CTL (3HA2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 36-11-34-000-001 Removal of the BMC (1HA1, 1HA2) AMM 36-11-34-400-001 Installation of the BMC (1HA1, 1HA2) ASM 36-11/02
3. Fault Confirmation
__________________
A. Not applicable.
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
122VU AIR BLEED/ENG 2/CTL 3HA2 Z23
B. If the fault symptom is identified by the maintenance message CHECK PRESS REG-V PWR SPLY:
-do a check of the status of the circuit breaker (3HA2).
(1) If the circuit breaker (3HA2) is closed:
-do a check for 28VDC at pin AA/8A of the BMC2 (1HA2) (Ref. ASM 36-11/02).
(a) If there is 28VDC:
-replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
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--Feb 01/05R ---CES -
(b) If there is no 28VDC:
-do a check for ground at pin AB/1B of the BMC2 (1HA2).
1_ If there is no ground:
- repair the wiring between the BMC2 pin AB/1B and the ground
terminal .
2 If there is ground:
_
-do a check of the wiring between the BMC2 pin AA/8A and the circuit breaker (3HA2).
a If there is no continuity:
_
-repair the above wiring. b If there is continuity:
_ -replace the circuit breaker (3HA2).
(2) If the circuit breaker (3HA2) is open:
-close the circuit breaker.
(a) If the circuit breaker trips:
-replace the BMC-2 (1HA2). 1 If the fault continues:
_
-do a check for a short to ground at the wiring between the BMC2 pin AA/8A and the circuit breaker (3HA2).
a If there is a short to ground:
_
-repair the related wiring. b If there is no short to ground:
_ -replace the C/B-AIR BLEED/ENG 2/CTL (3HA2).
(b) If the circuit breaker stays closed and the fault continues:
-replace the BMC-2 (1HA2).
C. Do the operational test given in Para. 3.
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-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page A216
--Feb 01/05R ---CES -
Loss of the Bus from the EIU1
1. Possible Causes
_______________
-BMC-1 (1HA1)
-EIU-1 (1KS1)
-wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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