Service difficulty report · Circuit Board · Airbus A320231

Difficulty date
December 26, 2003
Submitted
February 9, 2004
Operation
Air carrier
Aircraft
N633AW
Make and model
Airbus A320231
Aircraft serial
082
Aircraft time
45,012 hours, 20,365 cycles
Part
Circuit Board
Condition
Malfunctioned
Location
Lt Sfcc
Part time
30,289 hours, 12,921 cycles
Stage of operation
AP
How discovered
O
Nature of condition
F, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY LANDING, ON FINAL APPROACH, EN ROUTE, SLATS LOCKED AT POSITION 1, FLAPS OPERATED NORMALLY. DECLARED EMERGENCY, LANDED FLAPS 3, SLATS 1 IAW ECAM QRH "SLAT BREAK LOCKED". MAINTENANCE REMOVED AND REPLACED NR 1 SLAT FLAP CONTROL COMPUTER (SFCC) IAW AMM 27-51-34, OPERATIONAL CHECK WAS GOOD. VENDOR FUNCTIONAL CHECK OF SFCC CONFIRMED FAILURE OF UNIT. SLAT LVDT INTERFACE CHECKS FAILED DUE TO R44 & R53 ON SLAT LANE-1 CIRCUIT BOARD OUT OF TOLERANCE. REPLACED RESISTORS R44 & R53 ON SLAT LANE-1 CIRCUIT BOARD (A10), ALSO REPLACED CROSS LANE RAM U23 ON SLAT OUTPUT CIRCUIT BOARD (A9) DUE TO BITE FAULT. MAINTENANCE ACCOMPLISHED IAW CMM 27-03-11, REV. 2.

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