(a)
With the ON legend off, the following failure:
-the anti ice valve is not fully closed. It is necessary to push the ENG 1(2) pushbutton switch to extinguish the FAULT legend (the ON legend comes on).
(b)
If the ON legend is on, the following failure:
-the anti ice valve is not fully open. It is necessary to release the ENG 1(2) pushbutton switch to extinguish the FAULT legend (the ON legend goes off). If failure of the anti ice valve is detected on the ground, it is possible to lock the valve butterfly in either the open or closed position for the next flight.
(4)
The ENG ANTI ICE ON indication is displayed in green on the MEMO page on the lower part of the upper ECAM display unit if at least one of the two ice protection systems of the engine air intakes is selected on.
(5)
Central warnings (Ref. Fig. 010, 011) Illumination of the FAULT legend of the ENG 1(2) pushbutton switch is accompanied by activation of the ECAM system:
-activation of the single chime,
-flashing of the amber MASTER CAUT light,
-warning display on the lower part of the upper ECAM display unit.
C. Anti-ice Valve Overpressure Indicator
(1)
The anti-ice valve mechanical overpressure indicator has a release pressure that is set by the pressure reducer piston. When the pressure is between 120 psi (8.27 bar) and 180 psi (12.41 bar) the indicator will move to the extended position (pop out).
(2)
When the overpressure indicator on the anti-ice valve is in the extended position there is a problem with the regulator in the valve or there is a problem with the overpressure indicator.
1EFF : ALL 1 30-21-00Page 16 1 1 May 01/04R 1 1 1CES 1
(3)
The regulator in the valve is used to reduce the pressure inside the valve. When the pressure is reduced it extends the life of the seals of the actuator piston.
(4)
Failure of the regulator to reduce the actuator pressure will shorten the life of the piston seals. If the seals are not good and the piston does not operate correctly it can possibly cause the valve to move to the closed position. If the valve moves to the closed position the air will not flow through the valve or the anti-ice system.
ENGINE AIR INTAKE ICE PROTECTION - DEACTIVATION/REACTIVATION
____________________________________________________________
TASK 30-21-00-040-001 Deactivation of the Engine Anti-Ice Valve in CLOSED Position WARNING : BE CAREFUL WHEN YOU WORK ON THE ENGINE COMPONENTS IMMEDIATELY AFTER
_______ THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS CAN STAY HOT FOR UP TO ONE HOUR.
1. Reason for the Job
__________________
R Refer to the MMEL TASK: 30-21-01 b) R Engine Ice Protection R Engine Anti-Ice Valve
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific hexagonal wrench
No specific warning notice
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors
71-13-00-410-040 Closing of the Fan Cowl Doors
30-21-00-991-901 Fig. 401
3. Job Set-up
__________
Subtask 30-21-00-860-050
A. Safety Precautions
(1)
On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2)
Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3)
On the overhead maintenance panel 50VU:
(a)
Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b)
Put a warning notice to tell persons not to energize the FADEC 1(2).
R (4) On the ANTI ICE section of the panel 25VU:
(a) Release the ANTI ICE/ENG 1(2) pushbutton switch (the ON legend goes off).
Subtask 30-21-00-010-052
B. Get Access
(1) Open the right fan-cowl door (Ref. TASK 71-13-00-010-040):
-
FOR 1000EM1
438AR.
-
FOR 1000EM2
448AR.
Subtask 30-21-00-865-051
C. Open, safety and tag this(these) circuit breaker(s):
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM ICE AND RAIN PROTECTION 防冰和排雨1(55)
