SDR UIEA2013021900093

Service difficulty report · Stiffener · Boeing 74747UF

Difficulty date: February 18, 2013
Submitted: February 19, 2013
Operation: Air carrier
Aircraft: N412MC
Make and model: Boeing 74747UF
Aircraft serial: 30559
Aircraft time: 56,947 hours, 8,577 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Stiffener
Condition: Damaged
Location: Bs 260
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

DURING WALKAROUND INSPECTION, MX FOUND DAMAGE ON BS 260, LBL10.75 RBL10.75, WL195.8 TWO CANTED BULKHEAD STIFFENERS, CONSISTING EDGE CRACKS MEASURING 1.00 AND 0.5" LONG (REF FIG 1). DAMAGE TO THE STIFFENERS EXCEEDS THE SRM 53-10-08-1A-2 ALLOWABLE DAMAGE LIMITS. PERFORMED A TIME LIMITED REPAIR.

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