3. Fault Confirmation
__________________
A. Do the operational test of the APU fire and overheat detection system (Ref. AMM TASK 26-13-00-710-001).
4. Fault Isolation
_______________
A. Remove the APU FDU (13WG):
- make sure that there is no ground signal at the pin B/R of the APU FDU (13WG) on the wiring side (Ref. ASM 26-13/01).
(1) If there is no ground signal:
- replace the FDU-APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
(2) If there is a ground signal:
- remove the CFDIU (1TW)
- make sure that there is no ground signal at the pin AA/8K of the CFDIU (1TW) on the wiring side (Ref. ASM 26-13/01).
(a) If there is no ground signal:
- replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001)
- install the APU FDU (13WG).
「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 ∞∞26-13-00∞∞∞∞∞∞∞∞∞∞Page 223
Nov 01/04 CES (b) If there is a ground signal:
- do a check and repair the wiring between the CFDIU (1TW) pin AA/8K and the engine APU FDU (13WG) pin B/R (Ref. ASM 26-13/01)
- install the CFDIU (1TW)
- install the APU FDU (13WG).
B. Do the test given in para. 3.
APU FIRE AND OVERHEAT DETECTION - TASK SUPPORTING DATA
______________________________________________________
APU Fire and Overheat Detection - Block Diagram
Figure 301
「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 ∞∞26-13-00∞∞∞∞∞∞∞∞∞∞Page 302
Feb 01/98 CES
AVIONICS COMPARTMENT SMOKE DETECTION - FAULT ISOLATION PROCEDURES
_________________________________________________________________
TASK 26-15-00-810-801
Avionics Smoke Warnings Inoperative
1. Possible Causes
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- DET-SMOKE, AVNCS COMPT (1WA)
- wiring of the 28VDC signal from the pin AA of the avionics compartment smoke detector (1WA) to the first terminal block
- wiring of the ground signal at the avionics compartment smoke detector (1WA)
- RELAY - SMOKE WARNING, AVNCS COMPT (2WA)
- wiring of this relay
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 21-26-00-710-001 Operational Check of System via MCDU AMM 26-15-15-000-001 Removal of the Smoke Detector (1WA) - Avionics R Compartment AMM 26-15-15-400-001 Installation of the Smoke Detector (1WA) - Avionics Compartment ASM 26-15/01
3. Fault Confirmation
__________________
A. Test Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 21-26-00-710-001).
4. Fault Isolation
_______________
A. If during the test, the SMOKE legend of the EMER ELEC PWR/GEN 1 LINE pushbutton switch and the FAULT legends of the VENTILATION/BLOWER and VENTILATION/EXTRACT pushbutton switches do not come on:
- replace the DET-SMOKE, AVNCS COMPT (1WA) (Ref. AMM TASK 26-15-15-000-001) and (Ref. AMM TASK 26-15-15-400-001).
(1) If the fault continues:
- do a check of the wiring of the 28VDC signal from the pin AA of the avionics compartment smoke detector (1WA) to the first terminal block
- do a check of the wiring of the ground signal at the avionics compartment smoke detector (1WA), pin A/B
「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 ∞∞26-15-00∞∞∞∞∞∞∞∞∞∞Page 201
May 01/04 CES
(Ref. ASM 26-15/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- replace the RELAY - SMOKE WARNING, AVNCS COMPT (2WA).
1_ If the fault continues:
- do a check and repair the wiring of this relay:
from pin A/A2 to the ground point
from pin A/X2 to the ground point
from pin A/A1 to the first terminal block
from pin A/X1 to the pin A/D of the avionics compartment
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