NOTE
On ground it may be necessary to cycle the ENG GOV switch
twice to clear the ECU malfunctions.
If the failure message (i.e. #1 PMS, #1 ECU MAINT, etc. caution messages,
or #1 ECU FAIL warning message) is still present proceed as follows:
Non critical malfunction.
(Both engines remain in AUTO mode)
Proceed with flight and correct trouble before next flight.
Critical malfunction.
(The affected engine reverts to MANUAL mode)
Land as soon as practical flying with one engine in MANUAL mode.
NOTE
In case of critical malfunction the ECU reversion to MANUAL
mode is independent from ENG GOV switch position.
Any small change in power will be compensated through the serviceable ECU
engine.
Power lever movement (through ENG TRIM switch) of the engine in
MANUAL is only required for large changes in power.
(See also the paragraph ″ENGINE OPERATION IN MANUAL MODE″).
AUTO MODE TO MANUAL MODE TRANSFER
Transfer from AUTO mode to MANUAL mode can occur as a result of:
- Pilot request by ENG GOV switch on collective control.
-
ECU reversion to MANUAL due to AUTO mode control system critical fault.
NOTE
In presence of an ECU failure the engine control system reverts
and operates in MANUAL mode independently from the ENG
GOV switch position.
However it can be convenient to set the ENG GOV switch to
MANUAL for congruence with the mode condition.
RFM A109E
R.A.I. Approved 3-29
Rev. 11
To Next Page
Loading...