Service difficulty report · Cowling · Boeing 74747UF

Difficulty date
September 22, 2010
Submitted
September 23, 2010
Operation
Air carrier
Aircraft
N493MC
Make and model
Boeing 74747UF
Aircraft serial
29254
Aircraft time
49,190 hours, 7,883 cycles
Engine
Ge CF680
Part
Cowling
Condition
Damaged
Location
Thrust Reverser
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 FOUND THE NR1 LT T/R TRANSLATING COWL WITH DELAMINATION DAMAGE TO THE OUTER SKIN, MEASURING 5.0 IN. X 2.0 IN LOCATED APPROX AT 10 O'CLOCK POSITION (REF FIG 1) AND A CRACK MEASURING 0.5 IN. LONG AND 1 MISSING FASTENER AT THE BEAVER TAIL AREA (REF FIG 2). (DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS, DVI INSPECTIONS AFTER EVERY 5 FLIGHT CYCLES UNTIL ACCOMPLISHMENT OF PERMANENT REPAIR PRIOR TO THE ACCUMULATION OF 1,000 FH (FLIGHT HOURS) AFTER PART 1.)

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