- do a check and repair the wiring from the PHC 1 (6DA1) pin A/E to the LGCIU 1 (5GA1) pin AB/14A and/or from the PHC 1 pin A/D to the LGCIU 2 (5GA2) pin AB/14A (Ref. ASM 30-31/01).
B. Do the test given in para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-31-00∞∞∞∞∞∞∞∞∞∞Page 206
May 01/03R
CES Loss of the Power Supply for the Pitot Probe
1. Possible Causes
_______________
- PHC-1 (6DA1)
- wiring between the PHC 1 pin A/S and the ground terminal
- wiring between the PHC 1 pin A/A and the circuit breaker (3DA1) R - wiring from the PHC 1 (6DA1) pin A/H to the pitot probe 1 (9DA1) pin A/B
- C/B-ANTI ICE/PROBES/PITOT/1 (3DA1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 30-31-00-710-001 Operational Test of the Probe Ice Protection
AMM 30-31-34-000-002 Removal of the Probe Heat Computer (PHC)
(6DA1,6DA2,6DA3)
AMM 30-31-34-400-002 Installation of the Probe Heat Computer (PHC)
(6DA1,6DA2,6DA3)
R AMM 34-11-15-000-001 Removal of the Pitot Probe (9DA1, 9DA2, 9DA3)
R AMM 34-11-15-400-001 Installation of the Pitot Probe (9DA1, 9DA2, 9DA3) ASM 30-31/01
3. Fault Confirmation
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A. Test
(1) Do the operational test of the probe ice protection (Ref. AMM TASK 30-31-00-710-001).
4. Fault Isolation
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A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ANTI ICE/PROBES/PITOT/1 3DA1 D02
「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 ∞∞30-31-00∞∞∞∞∞∞∞∞∞∞Page 207 B. If the test gives the maintenance message CHECK PITOT PHC 1 SUPPLY :
- do a check of the status of the circuit breaker (3DA1).
(1) If the circuit breaker is closed:
- do a check for 115VAC at pin A/A of the PHC 1 (6DA1) (Ref. ASM 30-31/01).
(a) If there is 115VAC:
- replace the PHC-1 (6DA1) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
(b) If there is no 115VAC:
- do a check for a ground signal at pin A/S of the PHC 1 (6DA1).
1 If there is no ground signal:
_
- repair the wiring between the PHC 1 pin A/S and the ground terminal.
2 If there is a ground signal:
_
- do a check of the wiring between the PHC 1 pin A/A and the circuit breaker (3DA1).
a If there is no continuity:
_ - repair the above wiring.
b If there is continuity:
_
- replace the circuit breaker (3DA1).
(2) If the circuit breaker is open:
- close the circuit breaker.
(a) If the circuit breaker trips again: R - disconnect the connector from the pitot probe 1 (9DA1) and do a R check of the resistance between pin A/B and pin A/C.
R 1_ If the resistance is more than 43 ohms (open circuit) or less
R than 35 ohms (short circuit):
R a_ Replace the PROBE-PITOT 1 (9DA1) (Ref. AMM TASK 34-11-15-R 000-001) and (Ref. AMM TASK 34-11-15-400-001).
R 2_ If the resistance is between 35 ohms and 43 ohms: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 除冰和排雨(27)
