Propeller Rpm Too High - Robin DR400 Series Pilot Operating Handbook

Propeller RPM too high

 Note:
1) Reduce power
2) Reduce airspeed below 100 KIAS (185 km/h) or as appropriate to
prevent propeller overspeed
3) Set power as required to maintain altitude and land as soon as
practical.
 Note:
Fluctuations in propeller RPM
If the propeller RPM fluctuates by more than ± 100 RPM with a constant
power lever position:
1) Change the power setting and attempt to find a power setting
where the propeller RPM no longer fluctuates.
2) If unsuccessful power lever full forward at airspeed < 185 km/h
(100 KIAS) until propeller speed stabilizes
3) If normal operation is resumed, continue the flight
4) If problem continues, select a power setting where the propeller
RPM fluctuations are minimum. Fly at airspeed below 185 km/h
(100 KIAS) and land as soon as practical.
Issue 3 – July 2014
Supplement
DR400/180R, DR400/200R, DR400/RP
If propeller RPM above 2300 (red range):
If the propeller
flights can be performed at 120 km/h (65 KIAS) and a
power setting of 100%. In case of over speed the
FADEC will reduce the engine power at higher airspeeds
to avoid propeller speeds above 2500 rpm.
POH DR400/120D,
speed
DR400/140B,
control fails,
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