Service difficulty report · Control System · Boeing 7374Q8

Difficulty date
December 18, 2015
Submitted
December 29, 2015
Operation
General aviation
Aircraft
N279AD
Make and model
Boeing 7374Q8
Aircraft serial
26279
Part
Control System
Condition
Failed
Location
Te Flaps
Component
Trailing Edge F
Stage of operation
TX
How discovered
O
Nature of condition
P
Precautionary procedure
O

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

What was found

POST FLIGHT INSPECTION FOUND RT OTBD FLAP FAIRING HANGING FROM UNDER RT WING. SUBSEQUENT INSPECTION REVEALED A BEARING IN A SUPPORTING MEMBER OF THE FLAP TRACT ASSEMBLY HAD FAILED PLACING STRESS ON SEVERAL OTHER MEMBERS OF THE TRACK ASSEMBLY, CAUSING ONE OF THE RODS TO FAIL. AMONG ITS OTHER DUTIES THIS ROD HELPED HOLD THE FAIRING IN PLACE. IN FLIGHT THIS CAUSED A ROLLING MOMENT TO THE LT. WHEN THE ROD BROKE, THE INITIAL SECTION OF THE FOWLER FLAP BEGAN TO PARTIALLY DEPLOY, ABOUT 2-3 INCHES.

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