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CAUTION
NOTICE: Before the ground operational test, the oil cooler system must not have any air locks.
1. Before the start of the ground operational test, examine the oil cooler, propeller, and governor
for metal contamination. These parts must be clean and free of contamination before the
ground operational test can begin. If the engine had failed before overhaul, the oil cooler,
propeller, and governor must be replaced or cleaned and examined by an approved repair
facility.
2. Put the aircraft in a position facing the wind.
3. Start the engine. If either you do not see oil pressure (greater than 0) indication within 10
seconds after engine start or oil pressure does not continue to increase above the published
minimum pressure (per Appendix A, Table A-2) in the next 20 seconds, stop the engine.
Identify and correct the problem before another engine start.
4. Monitor the oil pressure and oil temperature. If low or no oil pressure is noted, stop the
engine and identify the cause.
5. Operate the engine at 750 rpm for 1 minute; slowly increase the speed to 1000 rpm in 3
minutes.
6. Let the engine operate at 1000 rpm for approximately 3 minutes.
7. Look for any illuminated caution or warning lights in the cockpit.
8. If oil pressure is sufficient, operate the engine at 1000 RPM until the oil temperature is stable
or is at 140°F (60°C). After warm-up, the oil pressure is not to be less than the minimum
specified pressure per Appendix A.
9. Increase the engine speed to 1500 RPM and operate the engine at that speed for 15 minutes.
10. Make sure the cylinder head temperature, oil temperature, and oil pressure are within the
specified limits in Appendix A of this manual.
NOTICE: Extended ground operation can cause excessively high cylinder head and/or oil
temperatures.
If any malfunction occurs, stop the engine and let it cool. Identify and correct the
cause before continuation of the ground operational test.
11. Propeller Governor Check
• If the engine is equipped with a mechanical propeller governor, complete a cycle of the
propeller blade pitch positions as applicable per the airframe manufacturer's
recommendations.
• If the engine is equipped with an electronic propeller governor, the propeller will cycle
through blade pitch positions during "Step 6. Complete the Pre-Flight Test".
12. Operate the engine to full-static aircraft recommended power (in Appendix A) for up to 10
seconds.
Engine Initiation
Page 52
ON TURBOCHARGED ENGINES, OPERATE THE ENGINE AT LOW
SPEED UNTIL THE OIL PRESSURE IS STABLE. OVERBOOST CAN
OCCUR IF THE TURBOCHARGER CONTROL SYSTEM EXPERIENCES
UNUSUAL OIL PRESSURES DUE TO AN OIL TEMPERATURE BELOW
THE MINIMUM OPERATION TEMPERATURE OF 140ºF (60ºC).
TEO-540-A1A Engine Installation and Operation Manual
© 2018 Avco Corporation. All Rights Reserved
October 2018
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