Service difficulty report · Sensor · Boeing 7377CT

Difficulty date
January 16, 2013
Submitted
September 14, 2015
Operation
General aviation
Make and model
Boeing 7377CT
Aircraft time
31,419 hours
Engine
Ge CFM567B24
Part
Sensor
Part number
9000421
Condition
Failed
Location
Flap Skew
Part time
31,592 hours
Stage of operation
AP
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

(CAN) DURING APPROACH THE FLIGHT CREW REPORTED THE FLAPS FAILED TO EXTEND WHEN SELECTED. A GO-AROUND WAS CARRIED OUT AND THE T/E FLAP ASYMMETRY NON-NORMAL CHECKLIST WAS COMPLETED. THE ACFT MADE AN UNEVENTFUL LANDING WHERE IT WAS THEN MET BY MAINTENANCE. MAINTENANCE CARRIED OUT THE FOLLOWING TASKS TO RECTIFY THE FAULT, THEY ARE AS FOLLOWS, FSEU BITE CHECK CARRIED OUT IAW FIM TASK 27-51, TASK 801. OBSERVED FAULT CODES, FLAP SKEW MSG 27-53258, FLAP 6 SKEW CON MSG 27-53414, FLAP 7 SKEW CON MSG 27-53415 & FLAP 8 SKEW CON MSG 27-53416. FIM TASK 27-59, TASK 809 & FIM TASK 27-59 TASK 815 CARRIED OUT. FOUND NR 5 FLAP SKEW SENSOR PINS 2 & 6 NO CONTINUITY. REPLACED SKEW SENSOR IAW AMM 27-59-01. FUNCTION CHECK SERVICABLE. THE ACFT WAS THEN SUCCESSFULLY RETURNED TO SERVICE. SDR TO BE UPDATED WITH SKEW SENSOR TEAR DOWN INFORMATION WHEN IT BECOMES AVAILABLE.

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