A320 Trouble Shooting Manual 排故手册 PNEUMATIC(32)

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R  the BMC1 (1HA1) connector between pins AA/14A and AA/15B. 
R  a_  If there is no 0.9VDC:
R  - replace the XDCR-BLEED TRANSFER PRESS, ENG 1 (7HA1) (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 (7HA1) to the BMC1 (1HA1), 
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 1 (7HA1). 
R  (2) If the circuit breaker is open: 
R  - close the circuit breaker. 
R  (a) If the circuit breaker trips: 
R  - replace the BMC-1 (1HA1) (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 (7HA1) to the 
R  circuit breaker (2HA1). 
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 1 (2HA1). 
R  (b) If the circuit breaker stays closed and the fault continues: 
R  - replace the BMC-1 (1HA1). 
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 238
 --Feb 01/05 ---CES - Loss of the Bleed Transferred-Pressure Transducer of the Engine 2

 

 1. Possible Causes
_______________

 -XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2)
 -BMC-2 (1HA2)

 -
wiring between pin A/2 of the bleed transferred-pressure transducer (7HA2) and the ground terminal

 -
wiring between pin A/1 of the bleed transferred-pressure transducer (7HA2) and the circuit breaker (2HA2)

 -
wiring from the bleed transferred-pressure transducer (7HA2) to the BMC2 (1HA2)

 -
wiring from pin A/1 of the bleed transferred-pressure transducer (7HA2) to the circuit breaker (2HA2)

 -C/B-BMC 2 (2HA2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 36-11-15-000-001 Removal of the Bleed Transferred Pressure Transducer (7HA1,7HA2) AMM 36-11-15-400-001 Installation of the Bleed Transferred Pressure
 Transducer (7HA1,7HA2) 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/MONG 2HA2 Z22
 1
 -EFF : ALL

-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page 239
 --Feb 01/05R ---CES -

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-228, 301-302,

 B. If the fault symptom is identified by the Class 3 maintenance message: 36-11-15 DRIFT 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).
 3 If the fault continues:
_
 -make sure that there is a 0 psig output signal (0.9VDC) on the BMC2 (1HA2) connector between pins AA/14A and AA/15B.
　
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