Service difficulty report · Skin · Boeing 74747UF

Difficulty date
August 31, 2010
Submitted
August 31, 2010
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
46,664 hours, 6,949 cycles
Engine
Ge CF680
Part
Skin
Condition
Cracked
Location
Fuselage
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 A-CHECK, GOUGES AND A CRACK WERE FOUND IN THE FUSELAGE BELLY SKIN BETWEEN BS 2585 AND 2587 AND S-47L AND -47R. REFER TO FIG 1 FOR DAMAGE LOCATION AND DESCRIPTION. (THE FUSELAGE SKIN AT THE DAMAGE LOCATION IF MADE FROM A 0.050 INCH THICK SKIN WITH A 0.040 INCH THICK BONDED DOUBLER, BOTH MADE FROM 7075-T6 ALUMINUM IAW SRM 53-80-01, FIG 1, ITEM 6. PART 1 OF THIS EO REMOVES THE DAMAGE AND INSTALLED A REPAIR IAW SRM 53-00-01, FIG 201, REPAIR 1. PART 2 OF THIS EO ACCOMPLISHES THE REPETITIVE INSPECTIONS REQUIRED FOR THIS CATEGORY B REPAIR.)

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