SDR 96ZZZX2389

Service difficulty report · Engine

Difficulty date: March 19, 1996
Submitted: March 26, 2000
Operation: General aviation
Engine: Cont O470R
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Engine
Condition: Failed
Location: Oil System
Stage of operation: CR
Nature of condition: 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 235.3 SMOH, 7.6 HRS AFTER NR 4 CYLINDER REMOVED FOR REPAIR. PHILLIPS XC OIL BEING USED. AV BLEND PUT IN ENGINE AFTER CYLINDER WAS REPAIRED. IN-FLIGHT, OIL PRESSURE STARTED TO DECREASE. LANDING MADE OK. AT IDLE, OIL PRESSURE DROPPED TO ZERO PSI, TOTAL FLIGHT TIME, 7 MINUTES. OIL DRAINED, FOUND SLUDGE OF UNKNOWN SUBSTANCE, ABOUT 1-2 TABLESPOONS OF MATERIAL, BROWNISH COLOR, DRAINED OUT WITH OIL. OIL SCREEN WAS VERY CLEAN. NONE OF THIS MATERIAL IN SCREEN.