DA 42 NG AFM
Emergency
Procedures
3.7 ONE ENGINE INOPERATIVE PROCEDURES
WARNING
In certain combinations of airplane weight, configuration, ambient conditions, speed and pilot skill, negative climb performance may result. Refer to Chapter 5 - PERFORM-
ANCE for one engine inoperative performance data.
In any event the sudden application of power during oneengine inoperative operation makes the control of the airplane more difficult.
CAUTION
Below 10,000 ft pressure altitude, do not attempt an in-flight engine restart if the engine has been shutdown for more than two minutes. Above 10,000 ft pressure altitude only immediate restart is possible.
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Emergency
DA 42 NG AFM
Procedures
3.7.1 DETECTING THE INOPERATIVE ENGINE
NOTE
One engine inoperative means an asymmetric loss of thrust, resulting in uncommanded yaw and roll in direction of the socalled "dead" engine (with coordinated controls). To handle this situation it is vital to maintain directional control by mainly rudder and additional aileron input. The following mnemonic can help to identify the failed engine:
"Dead foot - dead engine"
This means that, once directional control is re-established, the pilot can feel the control force on the foot pushing the rudder-pedal on the side of the operative engine, while the foot on the side of the failed engine feels no force. Further, the engine instruments can help to analyze the situation.
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DA 42 NG AFM
Emergency
Procedures
3.7.2 ENGINE TROUBLESHOOTING
WARNING
Control over the flight attitude has priority over attempts to solve the current problem ("first fly the airplane").
NOTE
With respect to handling and performance, the left-hand engine (pilots view) is considered the "critical" engine.
NOTE
If the loss of power was due to unintentional setting of the
POWER lever, you may adjust the friction lock and continue your flight.
Depending on the situation the following attempts can be made to restore normal engine operation:
1. Circuit breakers . . . . . . . . . . . . . . . . . . . . . . |
check / reset if necessary |
If normal engine operation is restored continue flight and land as soon as possible.
Otherwise:
2. VOTER switch . . . . . . . . . . . . . . . . . . . . . . . |
swap between ECU A and B |
If either ECU A or B setting restores normal engine operation then maintain that ECU setting and land as soon as possible.
CONTINUED
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Emergency
DA 42 NG AFM
Procedures
Otherwise:
3. VOTER switch . . . . . . . . . . . . . . . . . . . . . . . . switch back to AUTO to retain
ECU redundancy
If normal engine operation is restored continue flight and land as soon as possible.
Otherwise:
4. FUEL SELECTOR of affected engine . . . . . . CROSSFEED
CAUTION
Switching on the fuel pump of the affected engine in combination with CROSSFEED may cause damage to the high-pressure pump.
If normal engine operation is restored continue flight. Remain within maximum allowable lateral imbalance.
Otherwise:
5.FUEL SELECTOR of affected engine . . . . . . ON / CROSSFEED as required
6.ALTERNATE AIR . . . . . . . . . . . . . . . . . . . . . OPEN
7. POWER lever of affected engine . . . . . . . . . apply power as required
If normal engine operation is restored continue flight and land as soon as practicable.
If normal engine operation could not be restored by following the procedures in this section prepare for 3.7.3 - ENGINE SECURING (FEATHERING) PROCEDURE and land as soon as possible.
END OF CHECKLIST
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