SDR HEEA064911

Service difficulty report · Nozzle Shield · Bolkms BO105S

Difficulty date
October 28, 1999
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N911PF
Make and model
Bolkms BO105S
Aircraft serial
S718
Engine
Allsn 250C20B
Part
Nozzle Shield
Part number
6898782
Condition
Detached
Location
Turbine
Part time
523 hours
Component
6898735
Stage of operation
NR
Nature of condition
O
Precautionary procedure
O

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

What was found

ENGINE REMOVED DUE TO BLOWING OIL OUT OF EXHAUST STACK AND SMOKING BADLY. TEARDOWN INSPECTION REVEALED NR 1 NOZZLE SHIELD DOME DETACHED, NR 8 BEARING AREA EXPOSED TO EXCESSIVE HEAT CAUSING COKING AND SCAVENGE PORT BLOCKAGE FORCING OIL ACROSS 35-37 SEAL AND OIL QUENCHING THE WHEELS.