b_ If there is no short to ground: - replace the C/B-ANTI ICE ENG1 CTL SUPPLY (1DN1).
R R (b) If the circuit breaker stays closed and the fault continues: - do the functional test of the sense lines (Ref. AMM TASK 36-11-00-720-007).
R R R 1_ If there are leaks:- repair the defective muscle pressure tubes and hoses (Ref. AMM TASK 30-21-49-210-001).
R 2_ If there is no leak: - replace the VALVE-ENG AIR INTAKE ANTI ICE (4000DN).
C. Do the operational test given in Para. 3.
Failure of the Engine 2 Air Intake Anti-Ice Valve in the Open Position
1. Possible Causes
_______________
- VALVE-ENG AIR INTAKE ANTI ICE (4000DN)
- P/BSW-AIR INLET ANTI ICE VALVE ENG2 CTL (2DN2)
- wiring between pin A/10 of the engine 2 air intake anti-ice valve and the ground terminal
- wiring between pin A/9 of the engine 2 air intake anti-ice valve and the circuit breaker (1DN2)
- C/B-ANTI ICE ENG2 CTL SUPPLY (1DN2)
- defective muscle pressure tubes and hoses
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 30-21-00-710-002 Operational Test of the Engine Air Intake Ice R Protection (with the Engines in operation) AMM 30-21-49-210-001 Visual Inspection of the Anti-Ice System Tubes, Ducts, and Hoses AMM 30-21-51-000-040 Removal of the Engine Air-Intake Anti-Ice Valve (4000DN) AMM 30-21-51-400-041 Installation of the Engine Air-Intake Anti-Ice Valve (4000DN)
AMM 36-11-00-720-007 Functional Test of the Sense Lines Upstream of the Bleed Pressure Regulator Valve (4001HA) and Connected to the Control Solenoid (10HA1,10HA2)
ASM 30-21/02
3. Fault Confirmation
__________________
R A. Do the operational test of the engine air intake ice protection (Ref. AMM R TASK 30-21-00-710-002).
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
122VU ANTI ICE/ENG/2 1DN2 W10
「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 ∞∞30-21-00∞∞∞∞∞∞∞∞∞∞Page 204
May 01/05 CES B. If the test confirms the fault:
- do a check of the status of the circuit breaker (1DN2).
(1) If the circuit breaker is closed:
- do a check for 28VDC at pin A/9 of the engine 2 air intake anti-ice valve (4000DN).
(a) If there is 28VDC:
- replace the VALVE-ENG AIR INTAKE ANTI ICE (4000DN) (Ref. AMM TASK 30-21-51-000-040) and (Ref. AMM TASK 30-21-51-400-041).
(b) If there is no 28VDC:
- do a check for 28VDC at pin A/D2 of the ANTI ICE/ENG 2 pushbutton switch (2DN2).
1 If there is 28VDC:
_
- replace the P/BSW-AIR INLET ANTI ICE VALVE ENG2 CTL (2DN2).
2 If there is no 28VDC:
_
- do a check for a ground signal at pin A/10 of the engine 2 air intake anti-ice valve (4000DN).
a If there is no ground signal:
_
- repair the wiring between pin A/10 of the engine 2 air intake anti-ice valve and the ground terminal (Ref. ASM 30-21/02).
b If there is a ground signal:
_
- do a check of the wiring between pin A/9 of the engine 2 air intake anti-ice valve and the circuit breaker (1DN2).
c If there is no continuity:
_ - repair the above wiring.
d If there is continuity:
_
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