SDR DALA1110026302

Service difficulty report · Skin · Boeing 747451

Difficulty date: February 11, 2011
Submitted: February 14, 2011
Operation: Air carrier
Aircraft: N662US
Make and model: Boeing 747451
Aircraft serial: 23720
Aircraft time: 90,884 hours, 11,643 cycles
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Condition: Cracked
Location: Bs 2370 S15l
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

FUSELAGE SKIN EXTERIOR CRACK, BS2370, S-15L, L=0.7" IAW SRM 53-00-01, REPAIR 1 AND ER/A 488628-14 REV ORIGINAL. PERFORMED FUSELAGE SKIN EXTERNAL REPAIR, THIS IS A CATEGORY"B" REPAIR INSP REQUIREMENTS. INSPECTION THRESHOLD: AFTER REPAIR 1500 FLIGHTS METHOD: INTERNAL HFEC, INTERVAL 6000R/C REF: NDT, PART6, 51-00-00, FIG4. EXTERNAL LFEC, INTERVAL:1500 F/C REF: NDT, PART6 , 53-30-00, FIG 5, DEFERRED.