Flight Test - Lycoming IO-360-N1A Installation And Operation Manual

IO-360-N1A Engine Installation and Operation Manual
As shown in the "Engine Start and Operation" chapter of this manual, an operational test and a pre-
flight ground run-up must be done before approval by an authorized inspector for a flight test. This
flight test, which is part of the required engine break-in field procedure, is necessary to make sure
that the engine and aircraft are in compliance with all of the manufacturer's performance and
operational specifications before release of the aircraft for usual service.

1. Flight Test

REPLACE ENGINE TEST CLUBS WITH APPROVED FLIGHT PROPELLERS
BEFORE THE FLIGHT TEST.
A. Start the engine and complete a preflight run-up in accordance with the applicable
manufacturer's Pilot's Operating Handbook (POH).
B. Complete a full power take-off in accordance with the POH.
C. Monitor the engine RPM, fuel flow, oil pressure, oil temperature and cylinder head
temperature during take-off.
D. As soon as possible, decrease the engine speed to climb power in accordance with the POH.
E. Complete a shallow climb angle to a suitable cruise altitude.
F. Adjust the fuel/air mixture per the POH.
G. At cruise altitude, decrease power to approximately 75% and continue flight for 2 hours. For
the second hour, operate the engine at power settings alternating between 65% and 75%
power as per the applicable POH.
NOTICE: For a normally aspirated (non-turbocharged) engine, operate the engine at cruise
power at the lower altitudes. Density altitude in excess of 8,000 feet (2438 m) will
prevent the engine from reaching sufficient cruise power for an acceptable break-in;
an altitude of 5,000 feet (1524 m) is recommended.
H. If the engine and aircraft are operating to specifications in Appendix A, increase engine
power to the maximum airframe recommended power and hold for 30 minutes.
I. Decrease altitude at low cruise power and closely monitor the engine instruments. Do not do
long descents at low manifold pressure. Do not decrease altitude too rapidly. The engine
temperature could decrease too quickly.
J. After landing and shutdown, examine the engine for oil and fuel leaks. Identify and correct
the cause of any leaks.
© 2016 Avco Corporation. All Rights Reserved
February 2016
FLIGHT TEST
DURING BREAK-IN, MAKE SURE THE ENGINE IS ALWAYS
OPERATED AT 65% OR MORE CRUISE POWER TO ENSURE CORRECT
PISTON RING SEATING. ENGINE OPERATION BELOW 65% CRUISE
POWER AT ANY TIME CAN CAUSE POOR ENGINE PERFORMANCE.
DO NOT DO CLOSED THROTTLE DESCENTS. CLOSED THROTTLE
OPERATION DURING DESCENTS WILL CAUSE RING FLUTTER
WHICH CAN CAUSE DAMAGE TO THE CYLINDERS AND PISTON
RINGS.
Flight Test
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