- if there is no apparent DC power problem, do step (6).

 NOTE : The message DC POWER INTERRUPT is shown in the LLR when the DC
____ poweris less than 14VDC for more than 40 msec.
 (4) DC POWER BELOW 16V:
 - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because the DC power is less than 16.5 VDC, no more maintenance work is necessary

 - if there is no apparent DC power problem, do step (6).

 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 SLAT SYS 1 (2) FAULT is shown because the slats operate momentarily on one motor only, no more maintenance work is necessary

 - if there is no apparent slat motor problem, do step (6).

 (6) Make a record in the aircraft logbook to monitor the operation of the slat 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) Slat 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 (2) SYSTEM STOP DUE TO LOW PRESSURE:
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because of a
R hydraulic low pressure problem (green or blue), no more maintenance
R work is necessary
R - if there is no apparent hydraulic system problem, do the next step.

R (a) Do the operational test of the slat system (Ref. AMM TASK 27-84-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 slat operation, or the
R operation is intermittent, do the next step.

R (b) Do the trouble shooting procedure for the applicable VALVE BLOCK
R SLAT 1 (25CV) or VALVE BLOCK SLAT 2 (26CV), (Ref. TASK 27-81-00-R 810-801).

 「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 ∞∞27-81-00∞∞∞∞∞∞∞∞∞∞Page 231
 May 01/04 CESR 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 conditon can cause R the slats to operate intermittently.
R (3) DC POWER INTERRUPT:
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is 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 (7).

R NOTE : The message DC POWER INTERRUPT is shown in the LLR when the DC

____ R poweris less than 14VDC for more than 40 msec.
R (4) DC POWER BELOW 16V:
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because the DC
R power is less than 16.5 VDC, no more maintenance work is necessary
R - if there is no apparent DC power problem, do step (7).

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.
R (5) SINGLE MOTOR OPERATION:
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because the slats
R operate momentarily on one motor only, no more maintenance work is
R necessary
R - if there is no apparent slat motor problem, do step (7)
R - if the message LEVER OUT OF DETENT FOR MORE THAN 10 SEC is also
R shown on the LLR, do the next step.

R (6) LEVER OUT OF DETENT FOR MORE THAN 10 SEC:
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because the flap
R control lever is sensed out of detent by each system, do step (7)
R - if the ECAM Warning SLAT SYS 1 (2) FAULT is shown because the flap
R control lever is sensed out of detent by one system only, do the
　
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