Service difficulty report · Panel · Boeing 7472D7B

Difficulty date
December 29, 2010
Submitted
December 30, 2010
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
103,932 hours, 21,541 cycles
Part
Panel
Condition
Cracked
Location
Nlg Ww
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 INSP, CRACKS WERE FOUND ON LT AND RT SIDE PANELS IN THE NLG WW AREA OF LT PANEL: THE CRACK WAS LOCATED BETWEEN BS260 AND 280, WL 150, AND THE CRACK LENGTH WAS APPROX 2.0 INCHES (FIG 1). RT PANEL: THE CRACK WAS LOCATED BETWEEN BS300 AND 320, WL 150, AND THE CRACK LENGTH WAS APPROX 8.0 INCHES (FIG 2). (REPAIRS WERE ACCOMPLISHED IAW PROPOSAL REPAIR (HKA-TLS-10-0019-01C), SRM 53-10-04, FIG 116 AND SR 1-1769325648 (FIG 3 AND 4) AND THEY WERE APPROVED BY FAA 8100-9 DATED 29 DEC, 2010 (FIG 5). IAW FAA FORM 8100-9, REPAIRS ARE TIME LIMITED REPAIR, AND NEED PERMANENT REPAIR AT 22,000 TFC IAW PART 3 OF EO 4753A458RB (REF SB 53A2562R2).)

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