Service difficulty report · Skin · Boeing 7472D7B

Difficulty date
April 29, 2010
Submitted
May 5, 2010
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
101,810 hours, 21,118 cycles
Engine
Ge CF650E2
Part
Skin
Condition
Damaged
Location
Bs 1940
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 C-CHECK, DAMAGE WAS FOUND IN THE 65B04141-2 SKIN AT BS 1940, S-40L TO -41L.THE DAMAGE WAS TRIMMED OUT AND REPAIRED IAW NRC 270 AND SRM 53-30-03, FIGURE 18 (SEE FIGURES 1 AND 2). THE 65B04141-2 SKIN IS MADE FROM 0.063 INCH THICK 2024-T3 CLAD ALUMINUM SHEET IAW QQ-A-250/5. THE REPAIR CONSISTS OF AN 0.071 INCH THICK DOUBLER THAT MEASURES 12.0 INCH BY 12.0 INCH AND AN 0.071 INCH THICK STRUCTURAL FILLER THAT MEASURES 14.0 INCH BY 10.0 INCH.

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