3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
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PANEL DESIGNATION IDENT. LOCATION
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R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
R 121VU COM NAV/TCAS 4SG K10
R **ON A/C ALL
R 121VU COM NAV/RAD ALTM/2 1SA2 K12 R 121VU COM NAV/RAD ALTM/1 1SA1 K11
B. Test
(1) Do the BITE test of the TCAS (Ref. AMM TASK 34-43-00-740-001).
「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 ∞∞34-43-00∞∞∞∞∞∞∞∞∞∞Page 256
Aug 01/05 CES 4. Fault Isolation
_______________
A. If the BITE test gives the maintenance message TCAS (1SG):
- replace the CMPTR-TCAS (1SG) (Ref. AMM TASK 34-43-34-000-001) and (Ref. AMM TASK 34-43-34-400-001).
- if the fault continues, do the fault isolation given in para. B.
B. If the test does not give the maintenance message TCAS (1SG):
(1) pull-out the circuit breaker 1SA1 for radio-altimeter receiver 1
(a) if the fault clears:
- replace the ANTENNA-RA RCPTN, 1 (5SA1) and ANTENNA-RA XMSN, 1 (6SA1) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
(b) if the fault continues:
- replace the ANTENNA-RA RCPTN, 2 (5SA2) and ANTENNA-RA XMSN, 2 (6SA2) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
C. Do the test given in para. 3.
GROUND PROXIMITY WARNING SYSTEM (GPWS) - FAULT ISOLATION PROCEDURES
___________________________________________________________________
TASK 34-48-00-810-801
Failure of the GPWC
1. Possible Causes
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- GPWC (1WZ)
- short to ground at the wiring between the circuit breaker (3WZ) and the GPWC (1WZ)
- C/B-EIS/GPWS/115VAC (3WZ)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 34-48-00-740-002 BITE Test of the Enhanced GPWC
AMM 34-48-34-000-001 Removal of the GPWC (1WZ)
AMM 34-48-34-400-001 Installation of the GPWC (1WZ)
ASM 34-48/01
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
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PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
121VU EIS/GPWS/115VAC 3WZ P07
B. Test
(1) If the circuit breaker (3WZ) trips, refer to Para. 4. C. of this trouble shooting procedure.
(2) Do the BITE test of the Enhanced GPWS (Ref. AMM TASK 34-48-00-740-002).
- If the BITE test is not possible, refer to Para. 4. B. of this trouble shooting procedure.
4. Fault Isolation
_______________
A. If the circuit breaker (3WZ) is closed, and if the BITE test gives the maintenance message GPWC (1WZ):
- replace the GPWC (1WZ) (Ref. AMM TASK 34-48-34-000-001) and (Ref. AMM TASK 34-48-34-400-001).
「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 ∞∞34-48-00∞∞∞∞∞∞∞∞∞∞Page 201
Feb 01/98 CES
B. If the circuit breaker (3WZ) is closed and if the BITE test is not possible
- do a check for 115VAC at pin AC/2 of the GPWC.
(1) If there is no 115VAC:
- do a check of the wiring of the 115VAC signal from circuit breaker (3WZ) to GPWC (1WZ) (Ref. ASM 34-48/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- replace the C/B-EIS/GPWS/115VAC (3WZ).
(2) If there is 115VAC:
- do a check of the wiring of the ground signal at GPWC pin AC/3.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 导航 NAVIGATION 3(66)
