Lycoming IO-390-D Series Installation And Operation Manual page 46

D. 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.
E. Increase the engine speed to 1500 RPM and operate the engine at that speed for 15
minutes.
F. 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.
G. Complete a magneto drop-off check during engine start per the "Engine Initiation"
chapter in this manual.
H. Complete a cycle of the propeller pitch and a feathering check as applicable per the
airframe manufacturer's recommendations.
I. Operate the engine to full-static aircraft recommended power (in Appendix A) for up to
10 seconds.
J. After engine operation at full power, slowly decrease the RPM to idle and let the engine
stabilize.
NOTICE: As needed, set fuel controls on new, rebuilt, or overhauled engine to 50 to 100
rpm higher than usual idle speed (600 to 700 rpm) for the first 25 hours of
operation - then adjust to the usual setting after the first 25 hours of operation.
K. Complete a check of the idle mixture adjustment per the "Idle Speed and Mixture
Adjustment" procedure in Chapter 72-00 of the IO-390-D Series Engine Maintenance
Manual.
L. Shut down the engine per the "Engine Stop" procedure in the "Engine Initiation" chapter
of this manual.
M. After shutdown, examine the engine for oil and fuel leaks. Identify and correct the cause
of any leaks.
N. Per Chapter 12-10 in the IO-390-D Series Engine Maintenance Manual:
(1) Complete an oil change and replace the oil filter.
(2) Remove, clean, and install the oil suction screen.
(3) Add the correct grade and quantity of oil to the engine per the latest revision of
Service Instruction No. SI-1014 and Appendix A of this manual.
3. Proceed to the "Engine Initiation" chapter for the remaining procedures to put the engine into
service.
Field Run-In
Page 26
IO-390-D Series Engine Installation and Operation Manual
a) Start the engine again and monitor oil pressure.
b) Increase engine speed to 1500 RPM for 5 minutes.
© 2020 Avco Corporation. All Rights Reserved
March 2020