SDR AU510002060

Service difficulty report · Shroud · Boeing 737476

Difficulty date: December 12, 2005
Submitted: June 6, 2006
Operation: General aviation
Make and model: Boeing 737476
Engine: Cfmint CFM563C
System (JASC): 7250 · Turbine Section
Part: Shroud
Condition: Failed
Location: Turbine
Part time: 42,120 hours
Stage of operation: IN
How discovered: B
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

(AUS) LT ENGINE FAILED TO START. INVESTIGATION FOUND ENGINE SEIZED AND A SMALL AMOUNT OF DEBRIS IN THE TAILPIPE. BOROSCOPE INSPECTION FOUND DAMAGE TO HIGH PRESSURE TURBINE (HPT). INVESTIGATION FOUND THE HPT SHOUD HAD FAILED AND LODGED BETWEEN THE HPT BLADES AND THE FIRST STAGE LPT NOZZLE GUIDE VANE CAUSING THE N2 TO SEIZE. FURTHER INVESTIGATION CONTINUING. (CASA NR 510002060)