TASK 21-43-00-810-819
Electrical Circuit Fault
1. Possible Causes
_______________
- BOARD-ANN LT TEST & INTFC (11LP)
- CONT-CARGO HEAT (10HC)
- PUSHBUTTON SWITCH-CARGO HEATD/HOT AIR (16HC)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 21-43-34-000-002 Removal of the AFT Cargo Heat Controller (10HC) AMM 21-43-34-400-002 Installation of the AFT Cargo Heat Controller (10HC) AMM 21-61-00-710-001 Operational Test of the Pack Temperature-Control
System AMM 33-14-00-710-001 Operational Test of the Annunciator Light Test System in the Cockpit ASM 21-43/02
3. Fault Confirmation
__________________
A. Do the operational test of the pack temperature-control system (Ref. AMM TASK 21-61-00-710-001).
NOTE : The ZC (8HK) also monitors the cargo compartment heating system.
____
4. Fault Isolation
_______________
A. If the test gives the maintenance message TEST OK, but the FAULT legend on the pushbutton switch CARGO HEAT/HOT AIR, which is installed on the CARGO HEAT panel 25VU, comes on:
- do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001).
(1) If the operational test of the annunciator light test shows a fault:
- do the trouble shooting of the annunciator light test system.
(2) If the operational test of the annunciator light test is correct:
- do a check of the PUSHBUTTON SWITCH-CARGO HEATD/HOT AIR (16HC) and replace it if necessary (Ref. ASM 21-43/02).
(a) If the fault continues:
- do a check of the BOARD-ANN LT TEST & INTFC (11LP) and replace it if necessary (Ref. ASM 21-43/02).
「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 ∞∞21-43-00∞∞∞∞∞∞∞∞∞∞Page 214
May 01/03R CES
(b) If the fault continues:
- replace the CONT-CARGO HEAT (10HC) (Ref. AMM TASK 21-43-34-000-002) and (Ref. AMM TASK 21-43-34-400-002).
(c) If the fault continues:
- do a check and repair the wiring between: the RELAY (11LP) A/13 and SW (16HC) A/7, the RELAY (11LP) A/14 and ACHC (10HC) AA/5A (Ref. ASM 21-43/02).
B. Do the test given in para. 3.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
TASK 21-43-00-810-820
Aft Trim Air Pressure Regulating Valve (TAPRV) Control Circuit Fault
1. Possible Causes
_______________
- RELAY-TAPRV CLOSE (17HC)
- PUSHBUTTON SWITCH-CARGO HEAT/HOT AIR (16HC)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 21-61-00-710-001 Operational Test of the Pack Temperature-Control
System
ASM 21-43/02
ASM 21-43/02
3. Fault Confirmation
__________________
A. Do the operational test of the pack temperature-control system (Ref. AMM TASK 21-61-00-710-001).
NOTE : The ZC (8HK) also monitors the cargo compartment heating system.
____
4. Fault Isolation
_______________
A. If the test gives the maintenance message AFT TAPRV SHUT OFF RELAY:
- do a check for the RELAY-TAPRV CLOSE (17HC) and replace it if necessary (Ref. ASM 21-43/02).
(1) If the fault continues:
- do a check for the PUSHBUTTON SWITCH-CARGO HEAT/HOT AIR (16HC) and replace it if necessary (Ref. ASM 21-43/02).
(2) If the fault continues:
- do a check and repair the wiring between: the ACHC (10HC) AA/6A and CB (31HN) (Ref. ASM 21-43/02).
B. Do the test given in para. 3.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
「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 ∞∞21-43-00∞∞∞∞∞∞∞∞∞∞Page 216
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