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WARNING
It is possible that the propeller blades remain in the position of highest pitch in case of a malfunction of the engine control unit. In this case the reduced engine performance should be taken into consideration.
(a) Oscillating RPM
1.
Power setting ........................ change
2.
ECU SWAP ......................... ECU B
if the problem does not clear:
NOTE
If the problem does not clear itself, switch back to AUTOMATIC and land on the nearest airfield.
Doc. No. 6.01.05-E Revision 1 03-Mar-2003 Page 3 - 14
(b) Propeller overspeed
NOTE
Constant propeller overspeed indicates that the defective governor holds the propeller blades at the fine pitch stop.
NOTE
The propeller now works like a fixed pitch propeller. RPM is controlled by the engine power setting. Flight to the nearest airfield can be continued with a lower power setting and at a lower airspeed. Climb and go-around remain possible.
1.
Power lever ......................... as required to maintain 2300 RPM
2.
ECU SWAP ......................... ECU B
NOTE
If selecting ECU B does not solve the problem, switch back to AUTOMATIC. Keep controlling the RPM with the power lever.
Doc. No. 6.01.05-E Revision 1 03-Mar-2003 Page 3 - 15
(c) Propeller underspeed
NOTE
The propeller speed is constantly below the speed that is correct for the given power setting. This indicates that the governor holds the propeller blades at the high pitch stop.
1.
Power lever ......................... as required
2.
ECU SWAP ......................... ECU B
NOTE
If selecting ECU B does not solve the problem, switch back to AUTOMATIC.
WARNING
Due to this problem the propeller RPM will drop to 1400 RPM or below. There will be no climb performance and no go-around power available. Level flight should be possible except in rough weather.
3. Land as soon as possible.
Doc. No. 6.01.05-E Revision 1 03-Mar-2003 Page 3 - 16
3.2.7 FUEL TRANSFER PUMP FAILURE
1. Emergency fuel valve ................. EMERG. TRANSFER
CAUTION
When set to EMERG. TRANSFER, the emergency fuel valve transfers fuel using the engine driven fuel pump from the auxiliary tank to the main tank at a rate of approximately 18 to 21 US gal/h (70 to 80 liters/h).
WARNING
The emergency fuel valve must be switched back to NORMAL before the auxiliary tank indication reads zero! Otherwise, the engine will stop during flight when the auxiliary tank is empty.
WARNING
When the fuel pump takes in air (e.g. when the emergency fuel valve is not switched back and the auxiliary tank is empty), an inspection of the pump is necessary prior to next flight.
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