SDR DALA13001726307

Service difficulty report · Tension Tie · Boeing 747451

Difficulty date: January 11, 2013
Submitted: January 15, 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: Tension Tie
Condition: Cracked
Location: Bs 1160
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 1160 TENSION TIE FOUND ONE CRACK AT FWD CHANNEL, LOWER ROW 6TH FASTENER HOLE FROM OTBD. REAMED OVERSIZE FROM 0.187" TO 0.199" DIA IAW SB747-53A2507 REV1. NDT OPEN HOLE INSPECTION CARRIED OUT IAW NDTM D6-7170, REV 142 PART 6 51-00-00 PROC16 AND FOUND NO CRACK EVIDENT.