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-201-228, 301-302, -May 01/05 ---CES -
(2) If the circuit breaker is open:
-close the circuit breaker.
(a) If the circuit breaker trips:
-replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
1 If the fault continues:
_
-do a check for a short to ground at the wiring from pin A/1 of the bleed transferred-pressure transducer (7HA2) to the circuit breaker (2HA2).
a If there is a short to ground:
_ -repair the related wiring.
b If there is no short to ground:
_
-replace the C/B-BMC 2 (2HA2).
(b) If the circuit breaker stays closed and the fault continues:
-replace the BMC-2 (1HA2).
R **ON A/C 106-149, 229-299, 303-399, 401-499,
B. If the fault symptom is identified by the maintenance message TRANSF-PRESS XDCR 7HA2:
-do a check of the status of the circuit breaker (2HA2).
(1) If the circuit breaker is closed:
-do a check for 28VDC at pin A/1 of the bleed transferred-pressure transducer (7HA2) (Ref. ASM 36-11/02).
(a) If there is no 28VDC:
-do a check for ground at pin A/2 of the bleed transferred-pressure transducer (7HA2).
1 If there is no ground:
_
-repair the wiring between pin A/2 of the bleed transferred-pressure transducer (7HA2) and the ground terminal.
2 If there is ground:
_
-do a check of the wiring between pin A/1 of the bleed transferred-pressure transducer (7HA2) and the circuit breaker (2HA2).
a If there is no continuity:
_ -repair the above wiring.
b If there is continuity:
_
-replace the circuit breaker (2HA2).
1 -EFF : ALL
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--Aug 01/05 ---CES -
R 3_ If the fault continues:
R - make sure that there is a 0 psig output signal (0.9VDC) on
R the BMC2 (1HA2) connector between pins AA/14A and AA/15B.
R a_ If there is no 0.9VDC:
R - replace the XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2) (Ref.
R AMM TASK 36-11-15-000-001) and (Ref. AMM TASK 36-11-15-
R 400-001).
R 4_ If the fault continues:
R - do a check and repair the wiring from the bleed
R transferred-pressure transducer (7HA2) to the BMC2 (1HA2),
R pins A/3 and A/4 to pins AA/15B and AA/14B.
R (b) If there is 28VDC:
R - replace the XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2).
R (2) If the circuit breaker is open:
R - close the circuit breaker.
R (a) If the circuit breaker trips:
R - replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and
R (Ref. AMM TASK 36-11-34-400-001).
R 1_ If the fault continues:
R - do a check for a short to ground at the wiring from pin A/1
R of the bleed transferred-pressure transducer (7HA2) to the
R circuit breaker (2HA2).
R a_ If there is a short to ground:
R - repair the related wiring.
R b_ If there is no short to ground:
R - replace the C/B-BMC 2 (2HA2).
R (b) If the circuit breaker stays closed and the fault continues:
R - replace the BMC-2 (1HA2).
R **ON A/C ALL
C. After the subsequent flight, make sure that the fault does not continue.
1 -EFF : ALL
-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page 242
--Feb 01/05 ---CES - Loss of the Bleed Regulated-Pressure Transducer of the Engine 1
1. Possible Causes
_______________
-XDCR-BLEED REGULATED PRESS, ENG 1 (8HA1)
-BMC-1 (1HA1)
-
wiring between pin A/1 of the bleed regulated-pressure transducer (8HA1) and the circuit breaker (2HA1)
