Service difficulty report · Bearing · Socata TBM700

Difficulty date
December 12, 2002
Submitted
December 12, 2002
Operation
General aviation
Aircraft
N12WY
Make and model
Socata TBM700
Aircraft serial
112
Aircraft time
1,979 hours, 1,850 cycles
Engine
Pwa PT6A6
Engine time
1,979 hours, 1,850 cycles
Part
Bearing
Condition
Failed
Location
Nr 1
Part time
1,979 hours, 1,850 cycles
Stage of operation
DE
How discovered
O
Nature of condition
Y, G, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

A/C EXPERIENCED SUDDEN POWER LOSS & ENG STOPPAGE, AND A EMERGENCY LANDING FROM FL245. NO EXTERNAL OIL LEAKS, AND OIL LEVEL WAS DOWN 3 QUARTS FROM FULL. INSPECT OF THE POWER TURBINE SHOWED FOD AND A SMALL AMOUNT OF MELTED METAL IN THE DUCT. PROP SHAFT COULD NOT BE ROTATED. OIL SCREEN PULLED, FERROUS METAL AND BRONZE LIKE FILINGS WERE NOTED. ENG WAS SPLIT. COMPRESSOR HAD DAMAGED BLADES AND ONE MISSING. COMPRESSOR HAD FORE/AFT AND SIDE TO SIDE PLAY, AND RUBBED WHEN TURNED. INSPECT OF THE POWER TURBINE INLET DUCT SHOWED FOD AND SEVERAL TEMP PROBES BROKEN AND MISSING. INDICATIONS WERE THAT THE ENG EXPERIENCED A NR 1 BEARING FAILURE, RESULTING IN FAILURE OF THE COMPRESSOR AND POWER TURBINE WHEELS.

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