SDR CA051109001

Service difficulty report · Compressor · Bolkms BO105S

Difficulty date: October 29, 2005
Submitted: June 6, 2006
Operation: General aviation
Make and model: Bolkms BO105S
Aircraft time: 6,280 hours
Engine: Allsn 250C20B
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Condition: Damaged
Location: Engine
Stage of operation: IN
How discovered: 9
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

FOLLOWING A REPORT OF HIGHER THAN NORMAL TOT ON NR 2 ENGINE A POWER CHECK WAS CONDUCTED AND TROUBLESHOOTING LED TO SPLITTING THE COMPRESSOR FOR INSPECTION. SUBSTANTIAL DAMAGE WAS FOUND ON THE 5TH AND 6TH ROW STATOR VANES AND 6TH STAGE ROTOR BLADES. NO DAMAGE WAS EVIDENT FORWARD OF THE FIFTH COMPRESSOR STAGE. TWO STATOR BLADES WERE MISSING LEADING THE OPERATOR TO BELIEVE THAT A BLADE SEPARATION HAD CAUSED THE DAMAGE.