Service difficulty report · Skin · Boeing 74744AF

Difficulty date
April 9, 2026
Submitted
April 20, 2026
Operation
Air carrier
Aircraft
N575UP
Make and model
Boeing 74744AF
Aircraft serial
35664
Aircraft time
63,822 hours, 10,023 cycles
Part
Skin
Part number
113U101120
Condition
Cracked
Location
Zone 600
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

RIGHT WING INBOARD T/E UPPER FIXED PANEL SKIN CRACK, WBL 235.2. I.A.W. 747-400F SRM 57-51-01-2R-1 REFER TO SRM 51-70-07-0G-0 REV. 106 PERFORM REPAIR AS BELOW STEP: 1.1 REMOVE THE CRACK MATERIALS AND CLEAN. BOND THE REPAIR PLIES WITH FILM ADHESIVE CURED AT 260°F FOR 130 MINUTES WITH A MINIMUM VACUUM OF 22 IN/HG. INSTALLED FASTENERS OF R/H WING INBD T/E UPPER FIXED PANEL WBL 235.2 I.A.W SRM 51-40-02-0G REV.106 AND BOEING DWG: 113U1011 SHEET 22 REV.A.

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