Service difficulty report · Skin · Boeing 74747UF

Difficulty date
July 27, 2010
Submitted
August 3, 2010
Operation
Air carrier
Aircraft
N498MC
Make and model
Boeing 74747UF
Aircraft serial
29259
Aircraft time
47,298 hours, 7,155 cycles
Engine
Ge CF680
Part
Skin
Condition
Damaged
Location
Bs 682
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 D-CHECK, A DENT THAT HAD INTERIM APPROVAL AND WAS CHECKED AT EVERY "A" CHECK UNTIL A PERMANENT REPAIR COULD BE ACCOMPLISHED, WAS LOCATED AT BS 682 AND STR 37R. (DAMAGE WAS TRIMMED OUT AND A DOUBLER AND FILLER WERE INSTALLED IAW SRM 53-00-01, REPAIR NR 1 BY EGAT AS A CATEGORY B PERMANENT REPAIR IAW EGAT EI T2010A53B-1438 DOCUMENTED ON EGAT NRC1010. SEE FIG 2. THE SKIN IS MADE FROM CLAD 2024-T3 0.100 INCH THICK WITH MINIMUM CHEM-MILLED THICKNESS OF 0.063 IAW SRM 53-20-01, FIG 1, DETAIL II, ITEM 19. THE REPAIR CONSISTS OF DOUBLER 0.125 INCH THICK AND A FILLER 0.100 INCH THICK BOTH MADE FROM CLAD 2024-T3 INSTALLED WITH BACB30NW8K HI-LOKS, BACB30NW6K HI-LOKS AND BACR15CE8D RIVETS ALL PARTS INSTALLED IAW SRM 53-00-01 REPAIR NR 1, FIG 3)

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