Service difficulty report · Skin · Boeing 7377H4

Difficulty date
April 25, 2025
Submitted
April 29, 2025
Operation
Air carrier
Aircraft
N474WN
Make and model
Boeing 7377H4
Aircraft serial
33861
Aircraft time
68,350 hours, 40,919 cycles
Part
Skin
Condition
Delaminated
Location
Zone 500 Flap
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

L/H WING INBOARD TRAILING EDGE MAIN FLAP LOWER SKIN IS DELAMINATED 6.90 WIDE AND 3.70 LONG. DELAMINATED AREA STARTS 2.45 IN FROM OUTBOARD EDGE AND GOES THROUGH TRAILING EDGE (SEPARATION). SEE PIC. R/H WING INBOARD TRAILING EDGE MAIN FLAP LOWER SKIN IS DELAMINATED 6.90 WIDE AND 3.70 LONG. DELAMINATED AREA STARTS 2.45 IN FROM OUTBOARD EDGE AND GOES THROUGH TRAILING EDGE (SEPARATION). SEE ATTACHED PICTURE.<[01] THIS DELAMINATION IS PERMITTED AS A TIME LIMITED REPAIR PER SRM 57-53-01-1A-1. APPLIED SEALNT AND TWO LAYERS OF SPEED TAPE PER SRM 57-53-01-1A-1.;[02] THIS DELAMINATION IS PERMITTED AS A TIME LIMITED REPAIR PER SRM 57-53-01-1A-1. APPLICATION OF SEALANT AND TWO LAYERS OF SPEED TAPE; PER SRM 57-53-01-1A-1; ARE ACCEPTABLE.

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