1. Possible Causes
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-BMC-2 (1HA2)
-XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2)
-SENSOR-EXCHANGER OUT TEMP, ENG 2 (6HA2)
-wiring
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 36-11-00-740-001 BITE Test of the BMC 1(2) 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 36-11-17-000-001 Removal of the Heat-Exchanger Outlet-Temperature Sensor 6HA1(6HA2) AMM 36-11-17-400-001 Installation of the Heat-Exchanger Outlet-Temperature
Sensor 6HA1(6HA2)
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
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A. Test Do the BITE test of the BMC2 (Ref. AMM TASK 36-11-00-740-001).
4. Fault Isolation
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R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-228, 301-302,
A. If the test gives the maintenance message:
CHECK BMC2
-replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
1 -EFF : ALL
-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page A295
--May 01/05 ---CES - (1) If the fault continues:
-replace the XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2) (Ref. AMM TASK 36-11-15-000-001) and (Ref. AMM TASK 36-11-15-400-001).
(a) If the fault continues:
-replace the SENSOR-EXCHANGER OUT TEMP, ENG 2 (6HA2) (Ref. AMM TASK 36-11-17-000-001) and (Ref. AMM TASK 36-11-17-400-001).
1 If the fault continues:
_
-do a check for 28VDC at pins 1 and 2 of the bleed transferred pressure transducer (7HA2).
a If there is no 28VDC:
_
-do a check and repair the wiring (Ref. ASM 36-11/02) between pin 1 of the bleed transferred pressure transducer (7HA2) and the first terminal block.
b If there is 28VDC:
_
-do a check and repair the wiring (Ref. ASM 36-11/02) between: . pin 3 of the bleed transferred pressure transducer (7HA2) and pin AA/15B of the BMC2 (1HA2) . pin 4 of the bleed transferred pressure transducer (7HA2) and pin AA/14B of the BMC2 . pin 4 of the exchanger out temperature sensor (6HA2) and pin AA/10B of the BMC2 . pin 2 of the exchanger out temperature sensor (6HA2) and pin AA/9B of the BMC2.
R **ON A/C 106-149, 229-299, 303-399, 401-499,
A. If the test gives the maintenance message:
CHECK BMC2 (1HA2)
-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:
-replace the XDCR-BLEED TRANSFER PRESS, ENG 2 (7HA2) (Ref. AMM TASK 36-11-15-000-001) and (Ref. AMM TASK 36-11-15-400-001).
(a) If the fault continues:
-replace the SENSOR-EXCHANGER OUT TEMP, ENG 2 (6HA2) (Ref. AMM TASK 36-11-17-000-001) and (Ref. AMM TASK 36-11-17-400-001).
1 If the fault continues:
_
-do a check for 28VDC at pins 1 and 2 of the bleed transferred pressure transducer (7HA2).
1 -EFF : ALL
-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page A296
--Aug 01/05 ---CES -
R a_ If there is no 28VDC:
R - do a check and repair the wiring (Ref. ASM 36-11/02)
R between pin 1 of the bleed transferred pressure
R transducer (7HA2) and the first terminal block.
R b_ If there is 28VDC:
R - do a check and repair the wiring (Ref. ASM 36-11/02)
R between:
R . pin 3 of the bleed transferred pressure transducer
R (7HA2) and pin AA/15B of the BMC2 (1HA2)
R . pin 4 of the bleed transferred pressure transducer
R (7HA2) and pin AA/14B of the BMC2
R . pin 4 of the exchanger out temperature sensor (6HA2)
R and pin AA/10B of the BMC2
R . pin 2 of the exchanger out temperature sensor (6HA2)
R and pin AA/9B of the BMC2.
R **ON A/C ALL
B. Do the test given in para. 3.
1 -EFF : ALL
-∞∞36-11-00∞∞∞∞∞∞∞∞∞∞Page A297
--Feb 01/05 ---CES - Loss of the BMC 1 and Overpressure or Overtemperature on the Engine 1 Bleed System Detected by the BMC 2
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