SDR UIEA2010121700193

Service difficulty report · Sleeve · Boeing 747243F

Difficulty date: December 17, 2010
Submitted: December 20, 2010
Operation: Air carrier
Aircraft: N517MC
Make and model: Boeing 747243F
Aircraft serial: 23300
Aircraft time: 90,300 hours, 15,398 cycles
Engine: Ge CF650E2
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 OF N517MC, MX FOUND 1 EA CRACK ON THE NR2 ENGINE EXHAUST NOZZLE OUTER SLEEVE, LOCATED AT APPROX 7 O'CLOCK POSITION. THE CIRCUMFERENTIAL CRACK IS APPROX 2.5 IN LONG. IAW AMM 78-11-01 THE LENGTH OF THE CRACK IS OUT OF LIMITS. (DISPOSITION IS TO STOP DRILL THE ENDS OF THE CRACK WITH A 0.125 IN. DIAMETER HOLE (DRILL BIT); DVI EVERY 3 FLIGHT CYCLES; AND REMOVAL/REPLACEMENT OF THE PART PRIOR TO THE ACCUMULATION OF 50 FC (FLIGHT CYCLES).