Service difficulty report · Stringer · Boeing 7478F

Difficulty date
May 3, 2026
Submitted
May 20, 2026
Operation
Air carrier
Aircraft
N611UP
Make and model
Boeing 7478F
Aircraft serial
64257
Aircraft time
29,966 hours, 4,379 cycles
Part
Stringer
Part number
146U771379
Condition
Cracked
Location
Zone 200
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

STRINGER CRACK , AFT SIDE OF STA 1960 S-40L (LEVEL1) (REPAIR). ACCOMPLISHED REPAIR I.A.W EO-97410-REQ0012 REV.1 AND EGAT EI NO.F2026A53M-1077 REV.0 AND EGAT WORK SHEET NO.60341 AND SRM 53-60-03-2R-9 REV.48.I.A.W. B747 NDT MANUAL PART 1, 51-01-01 AND PART 4, 51-00-05, REV.182 TO PERFORM NDT/UT FOR THE POST REPAIRED AREA INCLUDED THE AREA WAS HOT PLUS WITHIN 6" ALL AROUND. RESULT: NO DEFECT FOUND.

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