Supplement POH
Cessna 172 R&S
(FAA-Version)
Page 3-22
Issue 3
Revision 2, Mar. 2022
FLUCTUATIONS IN PROPELLER RPM:
If the propeller RPM fluctuates by more than + / - 100 RPM with
a constant Thrust Lever position:
(1) Change the power setting and attempt to find a power set-
ting where the propeller RPM no longer fluctuates.
(2) If this does not work, set the maximum power at an
airspeed < 100 KIAS until the propeller speed stabilizes.
(3) If the problem is resolved, continue the flight
(4) If the problem continues, select a power setting where the
propeller RPM fluctuations are minimum. Fly at an airspeed
below 100 KIAS and land as soon as possible.
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