Service difficulty report · Nozzle · Boeing 74747UF

Difficulty date
January 4, 2012
Submitted
January 5, 2012
Operation
Air carrier
Aircraft
N496MC
Make and model
Boeing 74747UF
Aircraft serial
29257
Aircraft time
54,212 hours, 8,367 cycles
Part
Nozzle
Condition
Cracked
Location
Exhaust
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 WALKAROUND, MX FOUND A CRACK ON THE EXHAUST NOZZLE OUTER SLEEVE, BETWEEN APPROX THE 10 TO 12 O'CLOCK POSITION (LT SIDE) ON THE NR3 ENGINE. THE CIRCUMFERENTIAL CRACK IS APPROX 11" LONG AND IS 13" FROM AFT SIDE OF EXHAUST SLEEVE JUST IN FRONT OF NAC STA 349.236 IAW SRM 54-41-30 THE LENGTH OF THE CRACK IS OUT OF LIMITS. STOP DRILLED ENDS OF CRACK WITH A 0.125" DIAMETER HOLE.

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