- for SYSTEM STOP DUE TO LOW PRESSURE, do step (2)
- for DC POWER INTERRUPT, do step (3)
- for DC POWER BELOW 16V, do step (4)
- for SINGLE MOTOR OPERATION, do step (5)
- for INHIBIT SIGNAL FROM CARGO DOOR YELLOW SYSTEM, do step (6).
(2) SYSTEM STOP DUE TO LOW PRESSURE:
- if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because of a hydraulic low pressure problem (green or yellow), no more maintenance work is necessary
- if there is no apparent hydraulic system problem, do the next step.
(a) Do the operational test of the flap system (Ref. AMM TASK 27-54-00-710-001).
- if a permanent fault is found go to Page Block 101 and do the applicable fault isolation procedure
- if there is no apparent fault with the flap operation, or the operation is intermittent, do the next step.
(b) Do the trouble shooting procedure for the applicable VALVE BLOCK-FLAP 1 (23CV) or VALVE BLOCK-FLAP 2 (24CV), (Ref. TASK 27-51-00-810-802).
NOTE : When the hydraulic motor operates, the spool of the
____ control valve is moved and flow occurs. This flow can push particles, in the hydraulic fluid, against the valve block filter and cause a blockage. If a blockage occurs, the flow decreases and the spool moves back. This movement of the spool is sensed by the related SFCC, which stops the applicable hydraulic motor. Flow then decreases and lets the particles become free from the filter. This removal of the blockage then increases the flow, which moves the spool. This movement of the spool is sensed by the related SFCC, which releases the applicable hydraulic motor. This causes the flow to increase to the condition where a blockage can occur again. This fault condition can cause the slats to operate intermittently.
(3) DC POWER INTERRUPT:
- if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because of a DC power interrupt, no more maintenance work is necessary
- if there is no apparent DC power problem, do step (7).
「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 ∞∞27-51-00∞∞∞∞∞∞∞∞∞∞Page 235
Aug 01/05 CES NOTE : The message DC POWER INTERRUPT is shown in the LLR when the DC
____ power is less than 14VDC for more than 40 msec.
(4) DC POWER BELOW 16V:
- if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because the DC power was less than 16.5 VDC, no more maintenance work is necessary
- if there is no apparent DC Power problem, do step (7).
NOTE : The message DC POWER BELOW 16V is shown in the LLR when the DC
____ power is less than 16.5VDC, but more than 14VDC, for more than 20 msec.
(5) SINGLE MOTOR OPERATION:
- if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because the flaps operated momentarily on one motor only, no more maintenance work is necessary
- if there is no apparent flap motor problem, do step (7).
(6) INHIBIT SIGNAL FROM CARGO DOOR YELLOW SYSTEM.
- if the ECAM Warning FLAP SYS 2 FAULT was shown because the flap operation was prevented by a Cargo Door fault, no more maintenance work is necessary
- if there is no apparent Cargo Door fault, do the next step.
NOTE : The cargo door inhibit signal is supplied by System 2 only.
____
(a) At the MCDU set RETURN to go back to the SFCC 2 menu page.
(b) Set CLASS 3 FAULTS FLP and do a check for the message WRONG INHIBIT SIGN FROM CARGO DOOR YELLOW SYSTEM:
- if the message is shown, do the related trouble shooting procedure (Ref. TASK 27-51-00-810-841)
- if the message is not shown, do the next step.
(7) Make a record in the aircraft logbook to monitor the operation of the flap system during the next flight.
R **ON A/C 301-399,
R A. Procedure
R (1) For the applicable message from the SFCC 1 (2) Flap LLR, do the
R related procedure step:
R - for SYSTEM STOP DUE TO LOW PRESSURE, do step (2)
R - for DC POWER INTERRUPT, do step (3)
R - for DC POWER BELOW 16V, do step (4)
R - for SINGLE MOTOR OPERATION, do step (5)
R - for LEVER OUT OF DETENT FOR MORE THAN 10 SEC, do step (6)
R - for INHIBIT SIGNAL FROM CARGO DOOR YELLOW SYSTEM, do step (7).
「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 ∞∞27-51-00∞∞∞∞∞∞∞∞∞∞Page 236 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 飞行操纵 1(95)
