SDR UIEA2011081700455

Service difficulty report · Sleeve · Boeing 74747UF

Difficulty date: August 17, 2011
Submitted: August 19, 2011
Operation: Air carrier
Aircraft: N408MC
Make and model: Boeing 74747UF
Aircraft serial: 29261
Aircraft time: 54,858 hours, 8,568 cycles
System (JASC): 7810 · Engine Collector/Tailpipe/Nozzle
Part: Sleeve
Condition: Cracked
Location: Exhaust Nozzle
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, FOUND A CRACK ON THE EXHAUST NOZZLE OUTER SLEEVE, BETWEEN APPROX THE 9 TO 12 O'CLOCK POSITION ON THE NR 3 ENGINE. THE CIRCUMFERENTIAL CRACK IS APPROX 11" LONG AND IS JUST IN FRONT OF NAC STA 349.236. IAW SRM 54-41-30 THE LENGTH OF THE CRACK IS OUT OF LIMIT. STOP DRILLED ENDS OF THE CRACK WITH A 0.125" DIAMETER HOLE.

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