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B. If the fault symptom is identified by the maintenance message: REG-PRESS XDCR 8HA2
-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 regulated-pressure transducer (8HA2) (Ref. ASM 36-11/02).
(a) If there is no 28VDC
-do a check of the wiring between pin A/1 of the bleed regulated-pressure transducer (8HA2) and the circuit breaker (2HA2).
1 If there is no continuity
_ -repair the above wiring.
2 If there is continuity
_ -replace the circuit breaker (2HA2).
(b) If there is 28VDC:
-do a check for ground at pin A/2 of the bleed regulated-pressure transducer (8HA2).
1 If there is no ground:
_
-repair the wiring between pin A/2 of the bleed regulated-pressure transducer (8HA2) and the ground terminal.
2 If there is ground:
_
-replace the XDCR-BLEED REGULATED PRESS, ENG 2 (8HA2) (Ref. AMM TASK 36-11-16-000-001) and (Ref. AMM TASK 36-11-16-400-001).
a If the fault continues:
_
-do a check and repair the wiring from the bleed regulated-pressure transducer (8HA2) pins A/3 and A/4 to the BMC2 (1HA2) pins AA/12B and AA/11B (Ref. ASM 36-11/02)
(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 short to ground on the wiring from pin A/1 of
the bleed regulated-pressure transducer (8HA2) to the
circuit breaker (2HA2).
1
-EFF : ALL
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a If there is a short to ground:
_
-repair the above wiring b If there is no short to ground:
_ -replace the C/B-BMC 2 (2HA2).
C. After the subsequent flight, make sure that the fault does not continue.
1
-EFF : ALL
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Shift of Calibration of the Bleed Regulated-Pressure Transducer of the Engine 1
1. Possible Causes
_______________
-XDCR-BLEED REGULATED PRESS, ENG 1 (8HA1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 36-11-16-000-001 Removal of the Bleed Regulated Pressure Transducer (8HA1,8HA2) AMM 36-11-16-400-001 Installation of the Bleed Regulated Pressure Transducer (8HA1,8HA2)
3. Fault Confirmation
__________________
A. Not applicable.
4. Fault Isolation
_______________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-228, 301-302,
A. If the fault symptom is identified by the Class 3 maintenance message: 36-11-16 DRIFT REG-PRESS XDCR 8HA1
-replace the XDCR-BLEED REGULATED PRESS, ENG 1 (8HA1) (Ref. AMM TASK 36-11-16-000-001) and (Ref. AMM TASK 36-11-16-400-001).
R **ON A/C 106-149, 229-299, 303-399, 401-499,
A. If the fault symptom is identified by the maintenance message REG PRESS XDCR 8HA1:
-replace the XDCR-BLEED REGULATED PRESS, ENG 1 (8HA1) (Ref. AMM TASK 36-11-16-000-001) and (Ref. AMM TASK 36-11-16-400-001).
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