SDR 95ZZZX1974

Service difficulty report · Gerotor · Piper PA23250

Difficulty date: March 28, 1995
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N54748
Make and model: Piper PA23250
Aircraft serial: 277554062
Engine: Lyc TIO540C1A
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Gerotor
Part number: LW15550
Condition: Seized
Location: Turbo Scavange
Stage of operation: IN
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

TURBO SCAVANGE PUMP FAILED. APPEARS THAT THE ROTOR CRACKED WHICH, IN TURN, SHEARED AN ANTI-ROTATION PIN IN THE PUMP HOUSING IN WHICH THE GEROTOR TURNS. THE HOUSINGS WERE DAMAGED BY THIS PUMP HOUSING SPINNING, THE TURBO WAS NOT SCAVANGED WITH OIL LEADING TO THE LOSS OVERBOARD OF THE ENGINE OIL.

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