SDR AU990369

Service difficulty report · Flap Track · Boeing 747312

Difficulty date
April 10, 1999
Submitted
March 26, 2000
Operation
General aviation
Make and model
Boeing 747312
Part
Flap Track
Part number
65B020225
Condition
Fractured
Location
Te Flap
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

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

What was found

(AUS) RIGHT INBOARD FORE FLAP TRACK CENTER BANANNA FITTING BROKEN AND PROTRUDING THROUGH THE FORE FLAP. FOLLOWING LOWERING OF THE FLAPS, THE CAUSE OF DAMAGE WAS FOUND TO BE FAILURE OF THE CENTER PROGRAMMING TRACK ASSEMBLY WHICH HAD FRACTURED INTO SEVERAL SECTIONS. INITIAL FRACTURE HAD OCCURRED AT APPROXIMATELY 100 MM TO 125 MM (4 INCHES TO 5 INCHES) FROM THE AFT END OF THE TRACK RUNNING FROM THE TRACK STOP ATTACHMENT HOLES.