SDR DALA13002386307

Service difficulty report · Channel · 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): 5320 · Fuselage Miscellaneous Structure
Part: Channel
Condition: Cracked
Location: Bs 1180
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 RT SIDE BS 1180 TENSION TIE, FOUND ONE CRACK AT AFT CHANNEL, LWR ROW 5TH FASTENER HOLE FROM OTBD AFTER FRAME. REAMED OVERSIZE FROM 0.187" TO 0.199" DIA IAW SB747-53A2507, REV 1. NDT OPEN HOLE INSPECTION CARRIED OUT IAW NDTM D6-7170, REV 142, PART 6 51-00-00, PROC 16 AND FOUND, NO CRACK EVIDENT.