Flight Manual STEMME S6
Doc.-No.:P400-006.000 E Page: 3-38 Revision: ---
Date of Issue: 07. October 2008 Agency approved Date of Rev.: --.--.----
3.12.1.19 Other Malfunctions of the Propeller-Pitch-Control
Green take-off position indicator light on the propeller control
unit does not come ON:
The propeller is not in start-position or the green control-light failed.
During „before take-off“-check: Eliminate the cause !
2. Before LANDING - CHECK at 115 km/h / 62 kts airspeed if the Start-
RPM is reached when executing a carefully THROTTLE UP. Avoid
exceeding the maximum allowed RPM.
- If the Start-RPM is reached the propeller is near the START-pitch.
Landing can be executed normally. The control-light may have
failed.
- If the Start-RPM is NOT reached the propeller is near the CRUISE-
pitch, the pitch is too high for Take-Off and Landing. Reduced
performance and rate-of-climb must be expected in the case of a
The yellow light comes ON for more than 1 second :
1. Notify manufacturer. After consultation with the manufacturer and
some tests of the propeller-pitch a ferry-flight may be possible.
CHECK if voltage of electrical system is less than 11.5V (normal
operating voltage is 12V).
Both lights (green and yellow) are FLASHING at the same time:
1. If the yellow light does not go OFF with normal voltage of electrical
system, contact the manufacturer.
Circuit-breaker pops out several times:
1. Leave the circuit-breaker OPEN! PROCEED with flight with fixed
propeller-pitch. Contact manufacturer of propeller or of A/C after
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