Service difficulty report · Skin · Boeing 74747UF

Difficulty date
April 26, 2011
Submitted
April 28, 2011
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
49,338 hours, 7,363 cycles
Part
Skin
Part number
65B01925311C
Part serial
000551
Condition
Damaged
Location
Lt Wing Te Flap
Part time
49,338 hours, 7,363 cycles
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

THE PURPOSE OF THIS EO IS TO DOCUMENT A MAJOR REPAIR. DURING WALK-AROUND INSP, MX REPORTED LT OTBD MID FLAP - WBL 597 - WBL 730 - T/E - DELAMINATION/DAMAGE (PN: 65B01925-311C / SN: 000551) - T/E MEASURING 11.0 FT. X 7.5 IN. (REF FIGURE 1). (DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS (SANDWICH TYPE W/ EXTERNAL ALUMINUM DOUBLERS (4 EA.) W/3 ROWS OF CHERRY MAX FASTENERS AROUND THE DAMAGE); SCHEDULE REPEAT INSPECTIONS AT EVERY 1 FC (FLIGHT CYCLE) IAW PART 2 AND PERMANENT REPAIR, IAW PART 3 BY REPLACING THE MID FLAP PRIOR TO THE ACCUMULATION OF 25 FLIGHT CYCLES AFTER PART 1.)

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