Service difficulty report · Skin · Boeing 74747UF

Difficulty date
February 23, 2011
Submitted
March 1, 2011
Operation
Air carrier
Aircraft
N409MC
Make and model
Boeing 74747UF
Aircraft serial
30558
Aircraft time
47,301 hours, 7,125 cycles
Part
Skin
Part number
65B237015
Condition
Dented
Location
Bs 529
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

DENT DAMAGE IN 65B23701-5 SKIN WAS DETECTED AT BS 529 BETWEEN S23L TO S24L. DEPTH OF DENT WAS .046 INCHES, WIDTH WAS 1.1 INCHES, & LENGTH WAS 1.9 INCHES AS RECORDED PER EGAT NRC 035. TO RESTORE THE TRIMMED OUT AREAS OF 65B23701-5 SKIN TO ITS ORIGINAL STRENGTH WILL REQUIRE THE INSTALLATION OF AN EXTERNAL REPAIR DOUBLER AND TWO FILLERS TO COMPENSATE FOR THE LOST OF MATERIAL AND STRENGTH. THE INSTALLATION OF THE EXTERNAL REPAIR DOUBLER IS A "CATEGORY B" PERMANENT REPAIR PER DEFINITION OF SRM 51-00-06.THE CATEGORY B REPAIR AT BS 529 BETWEEN S23L TO S24L CONSISTS OF A SMALL REPAIR FILLER, A LARGE REPAIR FILLER, AND A REPAIR EXTERNAL DOUBLER.

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