Service difficulty report · Flap Track · Boeing 7478F

Difficulty date
July 31, 2026
Submitted
September 23, 2026
Operation
Air carrier
Aircraft
N612UP
Make and model
Boeing 7478F
Aircraft serial
64258
Aircraft time
30,929 hours, 4,526 cycles
Part
Flap Track
Part number
113U951221
Condition
Debonded
Stage of operation
IN
How discovered
V
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

DISBOND-SKIN,LOWER FACE OF LT WING NR 4 FLAP TRACK AFT FAIRING. IAW SRM 57-53-70-2R-1 REFER TO SRM 51-70-05-2R-1 REV.49 PERFORM REPAIR AS BELOW STEP:1.1 REMOVE THE DISBOND MATERIALS AND CLEAN.1.2 MEASURE THE DAMAGE AREA (DIA:1", 21.5" FROM UPPER EDGE, 47" FROM AFT EDGE).1.3 BOND THE REPAIR PLIES WITH FILM ADHESIVE CURED AT 260°F FOR 130 MINUTES WITH MINIMUM VACUUM OF 22 IN/HG.2.CONDITION CHECK IS SATISFACTORY.

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