SDR CA070507009

Service difficulty report · Relief Valve · Cessna 208B

Difficulty date: May 3, 2007
Submitted: June 7, 2007
Operation: General aviation
Make and model: Cessna 208B
Aircraft time: 5,187 hours
Engine: Pwa PT6A114A
Propeller: Mcauly 3GFR34C703
System (JASC): 7931 · Engine Oil Pressure
Part: Relief Valve
Part number: 3020958
Condition: Malfunctioned
Location: Engine Oil
Part time: 7,508 hours
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) IN CRUISE FLIGHT, OIL PRESSURE BEGAN TO FLUCTUATE FROM BOTTOM TO MIDDLE OF GREEN RANGE, 80 TO 90 PSI. FAULT CONFIRMED ON GROUND RUN, NOT RELATED TO INDICATION. CONSULTATION WITH ENGINE OVERHAULER, OIL PRV VALVE TO BE CHECKED. PARTS AT TOOLS DISPATCHED, THIS REPORT OPEN. (TC NR 20070507009)

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