Propeller Owner's Manual
140
TESTING AND TROUBLESHOOTING
61-00-40
Page 4-5
Rev. 2 Jun/12
2. Troubleshooting
CAUTION:
INSTRUCTIONS AND PROCEDURES IN
THIS SECTION MAY INVOLVE PROPELLER
CRITICAL PARTS. REFER TO THE
INTRODUCTION CHAPTER OF THIS
MANUAL FOR INFORMATION ABOUT
PROPELLER CRITICAL PARTS. REFER TO
THE ILLUSTRATED PARTS LIST CHAPTER
OF THE APPLICABLE OVERHAUL MANUAL(S)
FOR THE IDENTIFICATION OF SPECIFIC
PROPELLER CRITICAL PARTS.
A. Insufficient RPM Control (Non-governing Propeller)
(1) Adjust the movement of the cockpit control
NOTE: The push-pull control lines must have sufficient
travel to actuate the piston through the full
stroke.
(a) Start and warm up the engine.
(b) Observe whether the piston moves through its stroke
in response to the push-pull control movement.
(c) Rework the control until sufficient travel is obtained.
1 Bottom the piston in the cylinder.
2 Pull out the cockpit propeller control
approximately 2.25 inches (57 mm) from the
instrument panel.
3 Locate the valve spool midway between the
cotter pin and the base of the guide pin.
4 Attach the propeller pitch control line to the valve
lever.
B. Maximum RPM (Static) is Low (Governing Propeller)
(1) Engine Power is low
(a) Follow aircraft POH and/or AMM recommended
checks to determine if the engine power is low.
(b) If the engine power is low, refer to a certificated
engine repair station or the engine manufacturer.
(c) If the engine power is within acceptable limits,
examine the maximum RPM stop setting of the
governor.
Summary of Contents for HC-D2MV20-3 Series
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