Service difficulty report · Stiffener · Boeing 74747UF

Difficulty date
January 23, 2011
Submitted
January 26, 2011
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
48,154 hours, 7,180 cycles
Part
Stiffener
Part number
65B0432542
Condition
Damaged
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 THE D02 PLUS C03, GENERAL DAMAGE WAS DETECTED ON STIFFENER, DEFORMED DAMAGE WAS DETECTED ON 65B04925-47 STIFFENER, AND IMPACT CRACK DAMAGE WAS DETECTED ON THE 65B04925-84 STIFFENERS (2 PLACES).( REPAIR OF GENERAL DAMAGE ON 65B04325-42 STIFFENER AT BS 1760/S-43R-44R, AS DOCUMENTED IAW EGAT NCR 694 WAS REPAIRED IAW EGAT EI T2011P53B-176. THE DAMAGED STIFFENER WAS REMOVED AND REPLACED. REPAIR OF DEFORMED DAMAGE ON 65B04925-47 STIFFENER AT BS 1640/S-47-49R, AS DOCUMENTED IAW EGAT NCR 693 WAS REPAIRED IAW EGAT EI T2011P57B-142. THE DAMAGED STIFFENER WAS R & R. REPAIR OF CRACK IMPACT DAMAGE ON 65B04925-84 STIFFENER AT BS 1640/S-49R AND BS 1720/S-49R, AS DOCUMENTED IAW EGAT NCR 692/693 WERE REPAIRED IAW EGAT EI T2011P53B-177. THE DAMAGED STIFFENERS (2 PLACES) WERE R & R.

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