Section 3 – Emergency procedures
POWERPLANT EMERGENCIES
6.7. OIL PRESSURE LIMITS EXCEEDANCE
LOW OIL PRESSURE
If oil pressure is under the lower limit (25 psi)
1. Throttle Lever …………… REDUCE to minimum practical
2. Mixture Lever ...………….. as required
3. OIL TEMP ………………… CHECK within limits
4. OIL PRESS ……………… CHECK
If oil pressure does not increase and temperature remains within limits
Monitor oil and cylinder head temperatures.
Land as soon as practicable.
If oil pressure does not increase and temperature exceeds limits
Reduce engine power to minimum required.
Land as soon as possible applying Forced landing procedure. (See Para 11)
Be prepared for engine failure and emergency landing.
If oil pressure tends to zero (combined with vibration, loss of oil, unusual
metallic smoke and noise)
Apply Forced landing procedure. (See Para 11)
HIGH OIL PRESSURE
If oil pressure exceeds upper limit (115 psi)
1. Throttle Lever …………… first REDUCE engine power by 10%
2. Mixture Lever ……………... as required
3. OIL PRESS ………………... CHECK
If oil pressure does not decrease
4. Land as soon as possible applying Forced landing procedure. (See Para
11)
An excessive oil pressure value can be counteracted by de-
creasing propeller rpm.
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