Supplement POH
Cessna 172 R&S
(FAA-Version)
Page 3-20
Issue 3
Revision 2, Mar. 2022
COOLANT TEMPERATURE "CT" TOO HIGH (RED RANGE):
(1) Increase airspeed and reduce power as quickly as possible
(2) Cabin Heat – COLD
(3) If coolant temperature reduces rapidly to normal range, fly
normally and monitor coolant temperature. Cabin heat as
required.
(4) If this does not cause the coolant temperature to drop,
i) Land as soon as possible
ii) Be prepared for an emergency landing
iii) Expect an engine failure
LIGHT "WATER LEVEL" ILLUMINATES
(1) Increase airspeed and reduce power as quickly as possible
(2) Coolant temperature "CT" check and monitor
(3) Oil temperature "OT" check and monitor
(4) If coolant temperature and/or oil temperature are rising into
yellow or red range,
i) Land as soon as possible
ii) Be prepared for an emergency landing
iii) Expect an engine failure
GEARBOX TEMPERATURE "GT" TOO HIGH (RED RANGE):
(1) Reduce power to 55% - 75% as quickly as possible
(2) Land as soon as possible.
FUEL TEMPERATURE TOO HIGH (RED RANGE):
(1) Switch to fuel tank with lower fuel temperature, if this con-
tains sufficient fuel
(2) Reduce engine power, if possible
(3) If fuel temperature remains in Red Range, land as soon as
possible
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