(a) Open this(these) circuit breaker(s):
1 2WW
_
2 3WW
_
(b) Close this(these) circuit breaker(s):
1 2WW
_
2 3WW
_
(2) Do the ground scanning of the central warning system (Ref. AMM TASK 31-50-00-710-001).
TASK 21-26-00-810-814
Warning of the Blower-Fan Pressure Switch Inoperative
1. Possible Causes
_______________
- AEVC (10HQ)
- PRESS SW-BLOWER FAN, AVNCS VENT (19HQ)
- wiring between the AEVC (10HQ) and the blower fan pressure switch (19HQ)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 21-26-00-710-001 Operational Check of System via MCDU AMM 21-26-11-000-001 Removal of the Blower and Extract Fan Pressure Switches (17HQ, 19HQ, 30HQ) AMM 21-26-11-400-001 Installation of the Blower and Extract Fan Pressure Switches (17HQ, 19HQ, 30HQ) AMM 21-26-34-000-001 Removal of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) AMM 21-26-34-400-001 Installation of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) ASM 21-26/03
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 21-26-00-710-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message PRESSURE SW 19HQ: R - replace the PRESS SW-BLOWER FAN, AVNCS VENT (19HQ) (Ref. AMM TASK 21-R 26-11-000-001) and (Ref. AMM TASK 21-26-11-400-001).
(1) If the fault continues:
- do a check and repair the wiring between the AEVC (10HQ) and the blower fan pressure switch (19HQ), pins AB/8D and the pins A/A (Ref. ASM 21-26/03).
(a) If the fault continues:
R - replace the AEVC (10HQ) (Ref. AMM TASK 21-26-34-000-001) and (Ref. AMM TASK 21-26-34-400-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 249
May 01/05 CES
B. Do the operational test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 250
May 01/05R
CES
TASK 21-26-00-810-815
Warning of the Blower-Fan Pressure Switch Inoperative
1. Possible Causes
_______________
- PRESS SW-BLOWER FAN, AVNCS VENT (17HQ)
- AEVC (10HQ)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 21-26-00-710-001 Operational Check of System via MCDU AMM 21-26-11-000-001 Removal of the Blower and Extract Fan Pressure Switches (17HQ, 19HQ, 30HQ) AMM 21-26-11-400-001 Installation of the Blower and Extract Fan Pressure Switches (17HQ, 19HQ, 30HQ) AMM 21-26-34-000-001 Removal of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) AMM 21-26-34-400-001 Installation of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) ASM 21-26/03
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 21-26-00-710-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message PRESSURE SW 17HQ:
- replace the PRESS SW-BLOWER FAN, AVNCS VENT (17HQ) (Ref. AMM TASK 21-26-11-000-001) and (Ref. AMM TASK 21-26-11-400-001).
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