Service difficulty report · Skin · Boeing 747451

Difficulty date
April 29, 2015
Submitted
May 4, 2015
Operation
Air carrier
Aircraft
N663US
Make and model
Boeing 747451
Aircraft serial
23818
Aircraft time
108,096 hours, 13,965 cycles
Part
Skin
Condition
Cracked
Location
Bs 2370
Stage of operation
IN
How discovered
9
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

FOUND CRACK AT FS 2370 S-15L. MEASURED CRACK AND TOTAL LENGTH IS 1.3750". REMOVED DAMAGE IAW SRM 53-00-01, REPAIR 1. PERFOMRED HFEC, DAMAGE CONTAINMENT, OF CUTOUT IAW NDT MANUAL 51-00-00, PART 6. PERFORMED BHEC OF EXISTING FASTENERS IAW NDT 51-00-00, PART 6. NO CRACKS INDICATIONS NOTED. FABRICATED DOUBLER AND FILLER TREATED AND PRIMED INSTALLED REPAIR IAW SRM 53-00-01, REPAIR 1. APPLIED TOP COAT. THIS REPAIR IS A CATEGORY B REPAIR WITH BLIND RIVETS IAW TABLE IV REPETITIVE INSPECTION WITIN 3,000 CYCLES, INTERVAL HFEC COMPLETE. REQUIRED INSPECTION COMPLETE.