Service difficulty report · Blade

Difficulty date
October 20, 2000
Submitted
November 14, 2000
Operation
General aviation
Engine
Allsn 250C20B
Part
Blade
Part number
6898782
Condition
Missing
Location
2nd St Blade Rt
Part time
1,644 hours, 2,412 cycles
Component
Turbine Wheel
Stage of operation
CR
How discovered
V
Nature of condition
B
Precautionary procedure
A

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

What was found

(CAN) N1 AND N2 SYSTEMS ABLE TO ROTATE PRIOR TO DISMANTLING, TURBINE FULLY DISMANTLED. NO EVIDENCE OF FOD UPSTREAM OF 2ND STAGE TURBINE WHEEL. HEAVY D.O.D. DOWNSTREAM OF 2ND WHEEL. 2ND TURBINE WHEEL MISSING ONE TURBINE BLADE. QTY SIX BLADES APPROX. 180 INCHES AWAY EXHIBIT DAMAGE ON THE TRAILING EDGES. THE NR 8 STATIONARY LAB SEAL IS BROKEN IN TWO PIECES, HOWEVER, BEARING LOCATION IS ONLY MINIMALLY EFFECTED. GP FORWARD ROTATING LAB SEAL BROKEN, PART OF SEAL HAS NOT BEEN LOCATED. 1ST AND 2ND BLADE PATHS EXHIBIT SUBSTANTIAL TIP RUB INDICATIONS. ALL OIL NOZZLES, SHAFTS, SUPPORTS AND BEARINGS ARE IN NORMAL CONDITION. (X)