R (a) Do the operational test of the flap system (Ref. AMM TASK 27-54-R 00-710-001). R - if a permanent fault is found go to Page Block 101 and do the R applicable fault isolation procedure R - if there is no apparent fault with the flap operation, or the R operation is intermittent, do the next step.
R (b) Do the trouble shooting procedure for the applicable VALVE R BLOCK-FLAP 1 (23CV) or VALVE BLOCK-FLAP 2 (24CV), (Ref. TASK 27-R 51-00-810-802).
R NOTE : When the hydraulic motor operates, the spool of the
____ R control valve is moved and flow occurs. This flow can push R particles, in the hydraulic fluid, against the valve block R filter and cause a blockage. If a blockage occurs, the R flow decreases and the spool moves back. This movement of R the spool is sensed by the related SFCC, which stops the R applicable hydraulic motor. Flow then decreases and lets R the particles become free from the filter. This removal of R the blockage then increases the flow, which moves the R spool. This movement of the spool is sensed by the related R SFCC, which releases the applicable hydraulic motor. This R causes the flow to increase to the condition where a R blockage can occur again. This fault condition can cause R the slats to operate intermittently.
R (3) DC POWER INTERRUPT:
R - if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because of a DC
R power interrupt, no more maintenance work is necessary
R - if there is no apparent DC power problem, do step (8).
R NOTE : The message DC POWER INTERRUPT is shown in the LLR when the DC
____ R power is less than 14VDC for more than 40 msec.
R (4) DC POWER BELOW 16V:
R - if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because the DC
R power was less than 16.5 VDC, no more maintenance work is necessary
R - if there is no apparent DC Power problem, do step (8).
R NOTE : The message DC POWER BELOW 16V is shown in the LLR when the DC
____ R power is less than 16.5VDC, but more than 14VDC, for more than R 20 msec.
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R (5) SINGLE MOTOR OPERATION:
R - if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because the
R flaps operated momentarily on one motor only, no more maintenance
R work is necessary
R - if there is no apparent flap motor problem, do step (8)
R - if the message LEVER OUT OF DETENT FOR MORE THAN 10 SEC is also
R shown in the LLR, do the next step.
R (6) LEVER OUT OF DETENT FOR MORE THAN 10 SEC:
R - if the ECAM Warning FLAP SYS 1 (2) FAULT was shown because the flap
R lever was sensed out of detent by one system only, do the next
R step.
R (a) Do a check of the CSU and its wiring to the SFCC, which
R identified the out of detent condition (Ref. TASK 27-51-00-810-R 805):
R NOTE : When one system senses that the flap control lever is out
____ R of detent, but the other system senses a correct R condition, then the fault is usually in the CSU.
R (7) INHIBIT SIGNAL FROM CARGO DOOR YELLOW SYSTEM. R - if the ECAM Warning FLAP SYS 2 FAULT was shown because the flap R operation was prevented by a Cargo Door fault, no more maintenance R work is necessary R - if there is no apparent Cargo Door fault, do the next step.
R NOTE : The cargo door inhibit signal is supplied by System 2 only.
____
R (a) At the MCDU set RETURN to go back to the SFCC 2 menu page.
R (b) Set CLASS 3 FAULTS FLP and do a check for the message WRONG
R INHIBIT SIGN FROM CARGO DOOR YELLOW SYSTEM:
R - if the message is shown, do the related trouble shooting
R procedure (Ref. TASK 27-51-00-810-841)
R - if the message is not shown, do the next step.
R (8) Make a record in the aircraft logbook to monitor the operation of the
R flap system during the next flight.
R **ON A/C ALL
B. Procedure
(1) If the ECAM warning FLAP SYS 1 (2) FAULT is shown, but there is no related CFDS message on the PFR, or on the SFCC 1 (2) Flap LLR, do step (2).
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(2) Remove the applicable flap fault relay 91CV or 93CV and use a multimeter to do a check at the base of the holder for a ground on pin Z and 28VDC on pin X: 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(96)
