SDR DALA13001216307

Service difficulty report · Tension Tie · Boeing 747451

Difficulty date: January 9, 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 INSPECTION ON LT SIDE BS 1160 TENSION TIE FOUND ONE CRACK AT FWD CHANNEL, UPPER ROW 1ST FASTENER HOLE FROM OTBD. REAMED OVERSIZE FROM 0.199" TO 0.247" 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.