SDR CA980325001

Service difficulty report · Spring · Cessna 305A

Difficulty date: March 5, 1998
Submitted: January 19, 2001
Operation: General aviation
Make and model: Cessna 305A
Aircraft time: 12,470 hours
Engine: Cont O47011B
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Spring
Part number: 533106
Condition: Broken
Location: Relief Valve
Part time: 5 hours
Component: Oil Pump · 532502A1
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

(CAN) OIL PUMP SPRING BROKE INTO 5 PARTS DURING FLIGHT. THIS RESULTED IN A DROP IN OIL PRESSURE OF APPROXIMATELY 8-10 PSI, WHICH REMAINED LOW. AS THIS SPRING WAS FROM OLD MILITARY STOCK, DATED 1970, IT WILLBE SENT FOR ANALYSIS TO TRY AND DETERMINE THE CAUSE OF THE FAILURE.

More about the Cessna 305A