Service difficulty report · Skin · Boeing 7379

Difficulty date
April 12, 2026
Submitted
April 13, 2026
Operation
Air carrier
Aircraft
N77559
Make and model
Boeing 7379
Aircraft serial
67183
Aircraft time
9,852 hours, 3,332 cycles
Part
Skin
Part number
112A4102713
Condition
Deformed
Location
Zone 500
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

LEFT WING SKIN INWARD AND OUTWARD DEFLECTION BETWEEN WSTA 711 - WSTA 512 AROUND WING ACCESS PANELS AND FUEL VENT PANELS.IN ACCORDANCE WITH EC/RA 5725-01174 LOWER WING SKIN WAS VISUALLY INSPECTED FOR OIL CANNING, NICKS, GOUGES AND OTHER DAMAGE EXTER NALLY. NO DEFECTS WERE NOTED AND NO DEFORMATION OF WING ACCESS PANELS WAS NOTICED. WING SKIN INTERNALLY WAS VISUALLY INSPECTED FOR DAMAGE, NO DAMAGE WAS FOUND, ALSO THE INTERNAL SKIN WAS INSPECTED TO VERIFY NO DAMAGE EXTENDED UNDER RIB CHORDS/SHEAR TIES, STR-6 TO STR-8 LOWER FLANGE. NO DAMAGE WAS FOUND. AN HFEC WAS AC COMPLISHED ON ALL OF THE DEFORMATIONS INTERNALLY AND EXTERNALLY AND WITHIN 6 INCHES BEYOND THE DENTED / WRINKLED AREA. NO DEFECT ES WERE NOTED BY QUALITY CONTROL. A VISIUAL INSPECTION WAS ACCOM PLISHED ON RIBS 17-25 BETWEEN STR-6 AND STR-8 INCLUDING END FITT INGS. NO DAMAGE WAS NOTED. NO LOOSE FASTENERS WERE FOUND, NO SEAL CRACKS, ELONGATED FASTENEER HOLES OR DAMAGED OR LOOSE FA STENERS WERE FOUND. REFERENCE BAM NON ROUTINE 3253981 FOR ALL WORK ACCOMPLISHED. PERMANENT REPAIR LT WING SKIN R & R C/W BY REPAIR TEAM. VERIFIED ALL WORK ACCOMPLISHED PER BOEING FRR1, FRR-2, FRR-3 AND FRR-4. APPROVED PER UAL EC/RA 5700-03990 AND 5700-03991.

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