Service difficulty report · Turbine Wheel · Bolkms BO105CBS

Difficulty date
August 9, 2005
Submitted
August 26, 2005
Operation
Air carrier
Aircraft
N911WK
Make and model
Bolkms BO105CBS
Aircraft serial
S753
Aircraft time
7,193 hours, 23,693 cycles
Engine
Allsn 250C20B
Engine time
3,715 hours, 10,606 cycles
Part
Turbine Wheel
Part number
23073854
Part serial
X509536
Condition
Separated
Location
Engine
Part time
377 hours, 1,116 cycles
Stage of operation
CL
How discovered
V
Nature of condition
D, R, J
Precautionary procedure
A

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

What was found

ENGINE LOST POWER IN FLIGHT. UPON INSPECTION OF THE TURBINE, THE 2ND STAGE TURBINE WHEEL WAS FOUND TO HAVE 1 BLADE MISSING WHICH SUBSEQUENTLY CAUSED SIGNIFICANT FOD DAMAGE TO THE 2ND, 3RD AND 4TH STAGE NOZZLES AND THE 3RD AND 4TH STAGE STAGE WHEELS AS WELL AS OTHER TURBINE SECTION DISTRESS. ALL DAMAGE WAS CONTAINED WITHIN THE TURBINE. THE 1ST AND 2ND STAGE WHEELS AND NOZZLES HAVE BEEN SENT TO MFG FOR INVESTIGATION.