SDR 95ZZZX6406

Service difficulty report · Oil Pump · Cessna 172

Difficulty date: October 31, 1995
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N6079A
Make and model: Cessna 172
Aircraft serial: 28679
Engine: Cont O300A
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Oil Pump
Condition: Bushing Defect
Location: Engine Oil
Stage of operation: IN
Nature of condition: W
Precautionary procedure: K

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

What was found

DURING MAJOR OVERHAUL, REAR CASE/OIL PUMP ASSY AND GEARS REWORKED. ENGINE HAD GOOD OIL PRESSURE, BUT AT OIL CHANGE, PUMP WOULD NOT PRIME ITSELF. DISSASSEMBLY REVEALED PUMP BUSHINGS WERE .004 INCH OUT OF CENTER AND ALLOWED TOO MUCH CLEARANCE ON ONE SIDE.

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