Service difficulty report · Fitting · Boeing 7472D7B

Difficulty date
July 22, 2011
Submitted
August 6, 2011
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
105,635 hours, 21,872 cycles
Part
Fitting
Part number
65B07935U8
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 ACCOMPLISHMENT OF EO 4753B354 (SB 747-53A2562, AD 2006-22-15) REPLACEMENT FITTING WAS FOUND TO HAVE (2) ATTACH PILOT HOLES WITH THE CENTER SHIFTED APPROX. 0.080 INCH COMPARED TO THE EXISTING STRUCTURE. (THE MISALIGNED HOLES WERE REPAIRED BY INSTALLATION OF FREEZE PLUGS IAW SRM 51-10-08 USING A 0.050 INCH MINIMUM WALL THICKNESS. ORIGINAL DIAMETER FASTENERS WERE USED TO INSTALL THE FITTING.)

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