SDR 8MHR2016FA0000313

Service difficulty report · Support

Difficulty date: June 29, 2016
Submitted: June 29, 2016
Operation: General aviation
Filed by: 8MHR895B
Keystone Turbine Services, LLC
Engine: Allsn 250C47B
Engine time: 190 hours, 326 cycles
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Support
Condition: Broken
Location: Engine
Part time: 190 hours, 326 cycles
Component: Compressor · Rroyce · C47B8
Component part number: M25010559
Stage of operation: IN
How discovered: O
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

OWNER/OPERATOR REPORTED METAL IN OIL. IAW MFG INSTRUCTIONS, THE NR 2 BEARING BORE AREA WAS EXAMINED WITH A BORESCOPE. FOUND THAT PIECES OF THE REAR SUPPORT, AFT OF THE BEARING RETAINING RING GROOVE, WERE BROKEN OFF, EVIDENTLY TRIGGERING THE CHIP LIGHT.