EDU message Fault condition Corrective action
# 1 (# 2) FUEL FLTR Engine fuel filter
partially clogged.
Proceed with flight. Cor-
rect trouble before next
flight.
FUEL DRAIN 1 (2) Fuel drain valve 1
(2) open.
Close the valve before re-
fuelling and/or taking off.
# 1 (# 2) DC GEN See the applicable ″ELECTRICAL POWER
FAILURE″ table in this Section.
BUS TIE See the applicable ″ELECTRICAL POWER
FAILURE″ table in this Section.
EXT PWR ON External power con-
nected to the air-
craft. Door open.
Disconnect as necessary.
Check door closed.
BATT OFF Battery discon-
nected.
Check battery switch po-
sition. If the switch is ON
and the message is still
present, proceed with
flight. Correct trouble be-
fore next flight.
NOTE
BATT OFF caution message is applicable only to
helicopters equipped with emergency bus.
When the external power is connected, the battery is
automatically disconnected and the BATT OFF caution
message is activated.
SERVO 1 (2) Failure of one of the
two servo hydraulic
systems.
Check if servo pressure is
low. Land as soon as prac-
tical (refer to paragraph
″SERVO HYDRAULIC
SYSTEM MALFUNC-
TION″ in this Section).
RFM A109E
E.A.S.A. Approved 3-11
Rev. 35
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