-
the APU BLEED p/bsw ON legend shows on.

 -
the OFF legend on the PACK 1 and the PACK 2 p/bsw shows off.

 (b)
 Set the X BLEED selector to the OPEN position.

 (3)
 Do the operational test of both BMCs (Ref. AMM TASK 36-11-00-740-001).

 (4) Stop the APU (Ref. AMM TASK 49-00-00-860-004). R **ON A/C 106-149, 211-299, 301-399, 401-499,
 A. Test
 (1)
 Start the APU (Ref. AMM TASK 49-00-00-860-005).

 (2)
 On the AIR COND panel 30VU:

 (a)
 Make sure that:

 -
the APU BLEED p/bsw ON legend shows on.

 -
the OFF legend on the PACK 1 and the PACK 2 p/bsw shows off.

 (b)
 Set the X BLEED selector to the OPEN position.

 (3)
 Do the operational test of both BMCs (Ref. AMM TASK 36-11-00-740-001).

 (4)
 Stop the APU (Ref. AMM TASK 49-00-00-860-006).

 1 -EFF : ALL

-∞∞36-12-00∞∞∞∞∞∞∞∞∞∞Page 211
 --Aug 01/05 ---CES -

 4. Fault Isolation
_______________
 A. If both BMCs give the maintenance message X-FEED VALVE 6HV OR CKT and the VALVE-X BLEED (6HV) is accidentally open:
 -put the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) to the CLOSE position.
 (1)
 If the VALVE-X BLEED (6HV) closes:

 -remove one of the two BMCs (Ref. AMM TASK 36-11-34-000-001),
 -do the operational test again.
 (a)
 If the test is OK:

 -replace the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001).

 (b)
 If the test is not OK:

 -install the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001).
 -remove the other BMC (Ref. AMM TASK 36-11-34-000-001),
 -do the operational test again.

 (2)
 If the fault continues:

 -do a check for a ground signal at the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV) connector A/X2 (Ref. ASM 36-12/01).
 (a)
 If there is a ground signal:

 -do a check and repair the wiring between: the BMC-1, BMC-2 (1HA1, 1HA2) connector AB/5A and the X-BLEED-VALVE AUTO CTL RELAY (4HV) connector A/X2 (Ref. ASM 36-12/01).

 (b)
 If there is no ground signal:

 -replace the X-BLEED-VALVE AUTO CTL RELAY (4HV).

 (3)
 If the VALVE-X BLEED (6HV) does not close:

 -replace the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on the panel 30VU.

 (4)
 If the fault continues:

 1_ If the test is OK:
 - replace the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM
 TASK 36-11-34-000-001).

 -replace the VALVE-X BLEED (6HV) (Ref. AMM TASK 36-12-52-000-001) and (Ref. AMM TASK 36-12-52-400-001).
 1
 -EFF : ALL

-∞∞36-12-00∞∞∞∞∞∞∞∞∞∞Page 212
 --May 01/05R ---CES -

 B. If both BMCs give the maintenance message X-FEED VALVE 6HV OR CKT and the VALVE-X BLEED (6HV) is accidentally closed:
 -replace the VALVE-X BLEED (6HV) (Ref. AMM TASK 36-12-52-000-001) and (Ref. AMM TASK 36-12-52-400-001).
 (1) If the fault continues:
 -put the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on panel 30VU to the OPEN position.
 (a)
 If the VALVE-X BLEED (6HV) opens:

 -replace the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV).

 (b)
 If the VALVE-X BLEED (6HV) does not open:

 1_ If the fault continues:
 - replace the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on the
 panel 30VU.
 2_ If the fault continues:
 - do a check and repair the wiring between:
 the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV) connector
 A/A3,A1 and the VALVE-X BLEED (6HV) connector A/H,J (Ref.
 ASM 36-12/01),
 - do a check and repair the wiring between:
 the VALVE-X BLEED (6HV) connector A/G and ground (Ref. ASM
 36-12/01).
 3_ If the fault continues:
 - do a check and repair the wiring between:
 the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) connector A/23
 and the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV)
 connector A/A2,X1 (Ref. ASM 36-12/01).
 4_ If the fault continues:
 - do a check and repair the wiring between:
 the CIRCUIT BREAKER (1HV) and the CROSSBLEED-VALVE SELECTOR
 SWITCH (3HV) connector A/21 (Ref. ASM 36-12/01).
　
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