Engine Operation In Hot Weather; Volcanic Ash - Lycoming IO-360-N1A Installation And Operation Manual

5. Before take-off, monitor the oil pressure, oil temperature, and cylinder head temperature to
make sure all are within their operating ranges (as specified in Appendix A).
6. Make sure that when take-off power is applied smoothly, oil pressure, fuel flow, manifold
pressure, and rpm remain stable.

Engine Operation in Hot Weather

1. During engine operation in hot weather:
A. Monitor oil and cylinder temperatures during taxiing and engine run up.
B. Operate with cowl flaps fully open.
C. Do not operate the engine at maximum power any longer than necessary to make the
climb configuration recommended by the aircraft manufacturer.
D. Enrich fuel mixture as necessary.
E. Operate at sustained sufficient airspeed to cool off the engine.
F. Continue to closely monitor temperatures.

Volcanic Ash

1. Given the dynamic conditions of volcanic ash, Lycoming's recommendation is NOT to
operate the engine in areas where volcanic ash is present - in the air or on the ground. Refer
to the latest revision of Service Instruction No. SI-1530 for any new details.
2. Ash on the ground and runways can cause contamination in the engine compartment and
subsequent engine damage during aircraft landing or take-off.
3. Piston engines can be damaged by inlet air contaminated with volcanic ash. Solid deposits
from any number of sources can collect on engine baffles or other engine surfaces and
prevent engine cooling. Accumulation of deposits on the induction air filter can restrict or
block air flow to the engine and significantly decrease engine power. Contamination of
engine oil can cause engine malfunction and/or failure from abrasive wear.
4. However, if during flight, the engine is in a particulate-laden atmosphere, do the following:
(a) Monitor the engine temperature during flight. (Damaged or blocked cooling baffles or
heavy deposits on engine cooling surfaces can decrease cooling efficiency and cause the
engine to overheat.)
Engine Conditions
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DO NOT TAKE-OFF IF ANY OF THE FOLLOWING CONDITIONS ARE
FOUND:
 Engine roughness
 Low, high or surging rpm or fluctuations
 High, low, or fluctuating oil pressure
 High or low fuel flow
 High manifold pressure
 Low battery charge.
IO-360-N1A Engine Installation and Operation Manual
© 2016 Avco Corporation. All Rights Reserved
February 2016