Service difficulty report · Acoustic Liner · Boeing 74747UF

Difficulty date
July 5, 2012
Submitted
July 7, 2012
Operation
Air carrier
Aircraft
N499MC
Make and model
Boeing 74747UF
Aircraft serial
29260
Aircraft time
52,226 hours, 8,739 cycles
Engine
Ge CF680C2B1F
Part
Acoustic Liner
Part number
CF680C2B1F
Part serial
704925
Condition
Punctured
Location
Nr 3 Engine
Part time
54,058 hours, 8,028 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

DURING MX WALK AROUND, MAINTENANCE FOUND THE FAN CASE ACOUSTICAL LINER PUNCTURE ON THE NR 3 ENGINE ESN 704925. MX DEFERRED ITEM IAW AMM 72-32-00, TABLE 602 ( OVER-SERVICEABLE-LIMIT EXTENSION), DAMAGE MUST BE REPAIRED WITHIN 10 FLIGHT CYCLES OR 100 FLIGHT HOURS, WHICHEVER COMES FIRST. DISPOSITION IS TO REMOVE ALL LOOSE PARTICLES; CLEAN THE REPAIR AREA WITH SOLVENTS AND FILL THE DAMAGE WITH THE EA934NA ADHESIVE; PERMANENT REPAIR WILL BE PERFORMED ON THE NR 3 ENGINE FAN CASE ACOUSTICAL LINER PUNCTURE WITHIN 10 FLIGHT CYCLES AFTER PART 1.)

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