Service difficulty report · Skin · Boeing 7472D7B

Difficulty date
December 6, 2006
Submitted
December 14, 2006
Operation
Air carrier
Aircraft
N526MC
Make and model
Boeing 7472D7B
Aircraft serial
22337
Aircraft time
92,366 hours, 18,963 cycles
Part
Skin
Condition
Cracked
Location
Rt Wing
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

RT WING UPPER L/E PANEL HAS 2 EACH AREAS WITH COMPOSITE CRACKS AT WBL 480, WBL 480 FORWARD CRACK IS 8.0 INCHES LONG. REPAIR AREA IS 3.0 INCH BY 12.0 INCH, WBL 480 AFT CRACK IS 6.0 INCHES LONG. REPAIR AREA IS 7.0 INCH BY 12.0 INCH. PERMANENT REPAIR WAS ACCOMPLISHED AS PER B747 SRM 51-40-09 FIG 18 AND 747 SRM 51-40-12. ALSO, REFERENCE ATLAS EO 4757A333.

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