1_ If there is a ground signal:
- replace the LOUD SPEAKER-CAPT (7WW) (Ref. AMM TASK 31-53-21-
000-001) and (Ref. AMM TASK 31-53-21-400-001).
a If the fault continues:
_
- replace the FWC-1 (1WW1) (Ref. AMM TASK 31-53-34-000-001) and (Ref. AMM TASK 31-53-34-400-001). . If the fault continues:
- replace the FWC-2 (1WW2) (Ref. AMM TASK 31-53-34-000-001) and (Ref. AMM TASK 31-53-34-400-001).
* If the fault continues:
- do a check and repair the wiring: ** of the AUDIO OUT signal from the FWC1 (1WW1) to the loud speaker (7WW) ** of the AUDIO OUT signal from the FWC2 (1WW2) to the loud speaker (7WW) (Ref. ASM 31-52/04).
2 If there is no ground signal:
_
- do a check and repair the wiring of pins A/B and A/T from the loud speaker (7WW) to the first terminal block (Ref. ASM 31-51/01).
(b) If there is no 28VDC:
- do a check for 28VDC at pin 2 of the circuit breaker (5WW) (Ref. ASM 31-51/01).
1 If there is 28VDC:
_
- do a check and repair the wiring from the circuit breaker (5WW) to the loud speaker (7WW) (Ref. ASM 31-51/01).
2 If there is no 28VDC:
_
- replace the C/B - CAPT/LOUD/SPKR (5WW).
(4) If the circuit breaker is open:
- close the circuit breaker.
(a) If the circuit breaker trips:
- replace the C/B - CAPT/LOUD/SPKR (5WW).
1 If the circuit breaker trips again:
_
- replace the LOUD SPEAKER-CAPT (7WW) (Ref. AMM TASK 31-53-21-000-001) and (Ref. AMM TASK 31-53-21-400-001).
a If the circuit breaker trips again:
_
- do a check for a short to ground and repair the wiring from the circuit breaker (5WW) to the loud speaker (7WW) (Ref. ASM 31-51/01).
「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 ∞∞31-53-00∞∞∞∞∞∞∞∞∞∞Page A246
Aug 01/05R
CES
C. If the fault only causes inhibition of the audio signal related to the CVR or TCAS:
- replace the LOUD SPEAKER-CAPT (7WW) (Ref. AMM TASK 31-53-21-000-001) and (Ref. AMM TASK 31-53-21-400-001).
(1) If the fault continues:
- do a check and repair the wiring of pins A/R and A/S from the loud speaker (7WW) to the audio mixing box (15WW) pins J, K (Ref. ASM 31-52/04).
D. If the fault only causes inhibition of the aural warnings related to the GPWS:
- replace the LOUD SPEAKER-CAPT (7WW) (Ref. AMM TASK 31-53-21-000-001) and (Ref. AMM TASK 31-53-21-400-001).
(1) If the fault continues:
- do a check and repair the wiring of pins A/K and A/L from the loud speaker (7WW) to the first terminal block (Ref. ASM 31-52/04).
E. 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 ∞∞31-53-00∞∞∞∞∞∞∞∞∞∞Page A247
Aug 01/05R
CES Failure of the First Officer Loud Speaker
1. Possible Causes
_______________
- AUDIO MIXING (14WW)
- FWC-1 (1WW1)
- FWC-2 (1WW2)
- LOUD SPEAKER-CAPT (7WW)
- wiring
- C/B - CAPT/LOUD/SPKR (5WW)
- LOUD SPEAKER-F/O (8WW)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-71-00-710-001 Operational Test of the CVR and the CVR Channel
Recording AMM 31-50-00-710-002 Operational Test of the Flight Warning Computer (FWC) AMM 31-53-21-000-001 Removal of the Loudspeakers (7WW,8WW) AMM 31-53-21-400-001 Installation of the Loudspeakers (7WW,8WW) AMM 31-53-33-000-001 Removal of the Audio Mixing Box (15WW) AMM 31-53-33-400-001 Installation of the Audio Mixing Box (15WW) AMM 31-53-34-000-001 Removal of the Flight Warning Computer (FWC)
(1WW1,1WW2) AMM 31-53-34-400-001 Installation of the Flight Warning Computer (FWC)
(1WW1,1WW2) AMM 34-43-00-740-001 BITE Test of the TCAS AMM 34-48-00-710-001 Operational Test of GPWS Ground Self-test Function ASM 31-51/01 ASM 31-52/04
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