SDR DALA13002346307

Service difficulty report · Failsafe · Boeing 747451

Difficulty date: January 16, 2013
Submitted: January 17, 2013
Operation: Air carrier
Aircraft: N667US
Make and model: Boeing 747451
Aircraft serial: 24222
Aircraft time: 97,543 hours, 11,950 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Failsafe
Condition: Cracked
Location: Bs 1120 Frame
Stage of operation: IN
How discovered: E
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 OPEN HOLE HFEC INSPECTION ON LT SIDE BS 1120 TENSION TIE, FOUND ONE CRACK AT FAILSAFE, UPPER ROW 1ST FASTENER HOLE FROM OTBD. FRAME SEGMENT REPAIR CARRIED OUT IAW SRM 53-40- 07, FIG 201, REPAIR 4. FAILSAFE REPAIR CARRIED OUT IAW SRM 51-70-11, FIG 1.