Service difficulty report · Skin · Boeing 747212B

Difficulty date
October 25, 2002
Submitted
November 21, 2002
Operation
Air carrier
Aircraft
N808MC
Make and model
Boeing 747212B
Aircraft serial
21048
Engine
Pwa JT9D*
Part
Skin
Part number
65B070021
Condition
Corroded
Location
Fuselage
Part time
85,585 hours
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 CURRENT "C" CHECK, FOUND CORROSION BETWEEN OUTER SKIN, DOUBLER AND TRIPLER AT BS 1960 STR 42 RT, LOCATED AT THE AFT LOWER CORNER CUTOUT OF THE AFT LOWER LOBE COMPARTMENT DOOR. NO LEVEL DECLARED BUT CORROSION CONSIDERED LOCAL. OUTER SKIN, DOUBLER AND TRIPLER TRIMMED AWAY. PERFORMED E/C OPEN HOLE INSPECTION AND SURFACE INSPECTION OF CUTOUTS TO ENSURE A CRACK FREE CONDITION. NO DEFECTS FOUND. FABRICATED FILLERS, DOUBLER AND TRIPLER. TREATED AND PRIME PAINTED IAW SRM. INSTALLED FASTENERS IAW SRM WET WITH BMS 5-95 SEALANT. REPAIR IS TIME LIMITED FOR 12 MONTHS PENDING DETERMINATION OF ALTERNATE INSPECTION PROCEDURES IAW SSI.

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