The FAULT Legend of the GPWS/SYS Pushbutton Switch Does not Come on
1. Possible Causes
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- P/BSW - GPWS/SYS (9WZ)
- wiring of the GPWS/SYS pushbutton switch (9WZ)
- wiring of the annunciator light test and interface board (4LP)
- C/B - EIS/GPWS/28VDC (2WZ)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 33-10-00-000-002 Removal of the Bulbs and the Body of a Pushbutton Switch in the Cockpit AMM 33-10-00-400-002 Installation of the Bulbs and the Body of a Pushbutton Switch in the Cockpit AMM 34-48-00-710-001 Operational Test of Enhanced GPWS Ground Self-test Function ASM 34-48/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of Enhanced GPWS ground self-test function (Ref. AMM TASK 34-48-00-710-001).
(2) Make sure that the FAULT legend of the GPWS/SYS pushbutton switch comes on.
4. Fault Isolation
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A. If the FAULT legend of the GPWS/SYS pushbutton switch does not come on:
- on the panel 25VU, set the INT LT/ANN LT switch to TEST and do a check to see if the FAULT legend comes on.
(1) If the FAULT legend does not come on:
- replace the P/BSW - GPWS/SYS (9WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
(a) If the fault continues:
- do a check and repair the wiring of the GPWS/SYS pushbutton switch (9WZ) from pin A/7 to annunciator light test and interface board (4LP) pin A/22 (Ref. ASM 34-48/01).
「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 232
Feb 01/03R CES
(2) If the FAULT legend comes on:
- replace the P/BSW - GPWS/SYS (9WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
(a) If the fault continues:
- do a check of the wiring of the GPWS/SYS pushbutton switch (9WZ): . pin A/C3 to GPWC (1WZ) pin AB/7C . pin A/C2 to annunciator light test and interface board (4LP) pin A/23 (Ref. ASM 34-48/01).
1 If there is no continuity:
_ - repair the above wiring.
2 If there is continuity:
_
- do a check of the wiring of the annunciator light test and interface board (4LP): . pin A/24 to pin A/39 . pin A/40 to pin A/20 . pin A/21 to the circuit breaker (2WZ) (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/28VDC (2WZ).
B. Do the test given in Para. 3.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
(1) On the panel 25VU, set the INT LT/ANN LT switch to BRT.
「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 233
Feb 01/03R
CES
Self-Test Function of the GPWS Inoperative
1. Possible Causes_______________
R R R R - GPWC (1WZ) - P/BSW - GPWS/G/S (5WZ) - wiring of the GPWS/G/S pushbutton switch (5WZ) - P/BSW - GPWS/G/S (4WZ) - wiring of the GPWS/G/S pushbutton switch (4WZ) - wiring of the SELF TEST discrete from the GPWC (1WZ) to the first terminal block - P/BSW - PULL UP/GPWS (5WZ) - wiring of the PULL UP/GPWS pushbutton switch (5WZ): - P/BSW - PULL UP/GPWS (4WZ) - wiring of the PULL UP/GPWS pushbutton switch (4WZ)
2. Job Set-up Information______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM AMM AMM AMM AMM ASM 33-10-00-000-002 33-10-00-400-002 34-48-00-710-001 34-48-34-000-001 34-48-34-400-001 34-48/01 Removal of the Bulbs and the Body of a Pushbutton Switch in the CockpitInstallation of the Bulbs and the Body of a Pushbutton Switch in the CockpitOperational Test of Enhanced GPWS Ground Self-test FunctionRemoval of the GPWC (1WZ)Installation of the GPWC (1WZ)
3. Fault Confirmation__________________
A. Test
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本文链接地址：A320 Trouble Shooting Manual 排故手册 导航 NAVIGATION 3(76)
