4. Fault Isolation
_______________
A. If the circuit breaker (12FN) is closed and if the HDG flag comes into view on the RMI:
- do a check for 115VAC at the VOR/DME RMI (11FN).
(1) If there is 115VAC:
- replace the RMI-VOR/DME (11FN) (Ref. AMM TASK 34-57-22-000-001) and (Ref. AMM TASK 34-57-22-400-001).
(2) If there is no 115VAC:
- do a check of the wiring of the 115VAC signal from the circuit breaker (12FN) to the VOR/DME RMI (11FN)
- do a check of the wiring of the ground signal at the VOR/DME RMI (11FN): pin A/D. (Ref. ASM 34-57/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- replace the C/B - NAV/VOR/DME/RMI (12FN).
B. If the circuit breaker (12FN) is open:
- close this circuit breaker.
(1) If the circuit breaker (12FN) trips:
- remove the RMI-VOR/DME (11FN) (Ref. AMM TASK 34-57-22-000-001).
- close the circuit breaker (12FN).
(a) If the circuit breaker stays closed:
- replace the VOR/DME RMI (11FN) (Ref. AMM TASK 34-57-22-400-001).
(b) If the circuit breaker trips again:
- do a check for a short to ground between the circuit breaker (12FN) and the VOR/DME RMI (11FN) (Ref. ASM 34-57/01).
1 If there is a short to ground:
_ - repair the above wiring.
2 If there is no short to ground:
_
- replace the C/B-NAV/VOR/DME/RMI (12FN).
3 Install the VOR/DME RMI (11FN) (Ref. AMM TASK 34-57-22-400-
_
001).
C. Do the test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞34-57-00∞∞∞∞∞∞∞∞∞∞Page 202
May 01/05 CES
R **ON A/C 106-149, 201-299, 301-399, 401-499,
TASK 34-57-00-810-803 Failure of the VOR/ADF/DME RMI
1. Possible Causes
_______________
- RMI-VOR/ADF/DME (21FN)
- wiring from the circuit breaker (12FN) to the VOR/ADF/DME RMI (21FN)
- wiring of the ground signal at the VOR/ADF/DME RMI (21FN)
- C/B-NAV/VOR/ADF/DME RMI (12FN)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-14-00-740-001 Interface Test of the IR
AMM 34-57-22-000-002 Removal of the VOR/ADF/DME RMI (21FN)
AMM 34-57-22-400-002 Installation of the VOR/ADF/DME RMI (21FN)
ASM 34-57/01
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU NAV/VOR/DME/RMI 12FN F13
B. Test
(1) Do the Interface test of the IR (but read only the heading value on the RMI) (Ref. AMM TASK 34-14-00-740-001).
(a) If the circuit breaker (12FN) is open, refer to Para. 4.B. of this trouble shooting procedure.
4. Fault Isolation
_______________
A. If the circuit breaker (12FN) is closed and if the HDG flag comes into view on the RMI:
- do a check for 115VAC at the VOR/ADF/DME RMI (21FN).
(1) If there is 115VAC:
- replace the RMI-VOR/ADF/DME (21FN) (Ref. AMM TASK 34-57-22-000-002) and (Ref. AMM TASK 34-57-22-400-002).
(2) If there is no 115VAC:
- do a check of the wiring from the circuit breaker (12FN) to the VOR/ADF/DME RMI (21FN).
- do a check of the wiring of the ground signal at the VOR/ADF/DME RMI (21FN) : pin A/55. (Ref. ASM 34-57/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- replace the C/B-NAV/VOR/ADF/DME RMI (12FN).
B. If the circuit breaker (12FN) is open:
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 導(dǎo)航 NAVIGATION 3(161)
