SDR UIEA200200047

Service difficulty report · Skin · Boeing 7472D3B

Difficulty date: September 20, 2002
Submitted: October 31, 2002
Operation: Air carrier
Aircraft: N505MC
Make and model: Boeing 7472D3B
Aircraft serial: 21251
Engine: Ge CF650*
System (JASC): 5414 · Nacelle/Pylon, Plate/Skin
Part: Skin
Part number: 65B941284
Condition: Cracked
Location: Nr 4 Pylon
Part time: 81,187 hours
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 CURRENT C CHECK, FOUND NR4 PYLON RIGHT HAND FORWARD ACCESS PLATE CUTOUT, BETWEEN NAC 211 AND 220, CRACKED. CRACKS INITIATED FROM THE CLIP NUT HOLES OF THE INNER LIP DOUBLER (4 PLACES). TRIMMED AWAY INNER DOUBLER AROUND THE ENTIRE CUTOUT. FABRICATED DOUBLER AND TRIPLER. INSTALLED DOUBLER AND TRIPLER IAW SRM.

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