Aircraft Operating Instructions (AOI)
Type:
CT
Series:
CTLS
LSA
Page: 3-9
AU 010 11000
Revision No. 4
Date: 29 Apr 2008
3.9. Loss of coolant
A loss of engine coolant does not mean that a forced landing must be carried out
immediately.
The coolant is used solely to cool the cylinder heads. The cylinders are air-cooled. As
coolant temperature is only indirectly indicated via the cylinder head temperature of
the hottest cylinder, engine temperature monitoring is still possible even after a total
loss of coolant.
In the case of a loss of coolant, engine power should be reduced enough to ensure
that the cylinder head temperature remains within normal operation limits (below
150°C - 302°F). If airspeed becomes too low, the flaps may be partially extended (0°-
15°). The aircraft can then be flown to a suitable airfield without causing permanent
damage to the engine.
If the temperature cannot be held within operating limits, one must decide whether
one is prepared to risk damage to the engine in order to reach a suitable field for an
emergency landing.
3.10. Loss of oil
A loss of oil is a very serious condition as the hot oil can easily ignite if it drops on to
the hot exhaust system. An emergency landing performed to the procedures
described above should be carried out as soon as possible.