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when the flaps have moved
only a short distance from
the UP setting.
Short to ground in the wires to the
electrical control unit from
micro-switch 1.
Do an insulation test between
each wire and ground. Repair or
replace defective wires.
Flap circuit-breaker opens
when the flaps have moved
only a short distance from
the LDG setting.
Short to ground in the wires to the
electrical control unit from
micro-switch 4.
Do an insulation test between
each wire and ground. Repair or
replace defective wires.
Flaps move slowly. Airplane electrical system voltage
low.
Flap motor defective.
Flap actuator defective.
Do a test of the airplane
electrical system voltage.
Do a test for 14 V at the motor
with flaps selected. If there is 14
V at the motor, replace the
actuator.
Examine the actuator. If you find
damage, then replace the flap
actuator.
Flaps do no not align with
the wing trailing edge.
Flaps extended at too high airspeed. Examine the flap system.
Replace damaged parts. Adjust
the system.
Flaps will not move to LDG
position. Flaps move to T/O
and UP correctly.
Micro-switch 4 defective.
Open circuit in the micro-switch 4
wiring.
Replace the micro-switch.
Do a continuity test of the wiring.
Repair or replace the defective
wire.
Flaps will not move to UP
position. Flaps move to T/O
and LDG correctly.
Micro-switch 1 defective.
Open circuit in the micro-switch 1
wiring.
Replace the micro-switch.
Do a continuity test of the wiring.
Repair or replace the defective
wire.
AIRCRAFT
DA 40 Series
AMM
Flight Controls
Trouble Possible Cause Repair
Doc # 6.02.01
Rev. 5 27-50-00 Page 103
20 Sep 2007
No LDG indication when
the flaps are in the LDG
position. Flaps will not
move from LDG to T/O.
Flaps move from LDG to
UP correctly.
Micro-switch 5 defective.
Open circuit in the micro-switch 5
wiring.
Replace the micro-switch.
Do a continuity test of the wiring.
Repair or replace the defective
wire.
No UP indication when the
flaps are in the UP position.
Flaps will not move from
UP to T/O. Flaps move
from UP to LDG correctly.
Micro-switch 2 defective.
Open circuit in the micro-switch 2
wiring.
Replace the micro-switch.
Do a continuity test of the wiring.
Repair or replace the defective
wire.
No T/O indication when the
flaps are in the T/O
position. Flaps move to all
positions correctly.
Micro-switch 3 defective.
Open circuit in the micro-switch 3
wiring.
Replace the micro-switch.
Do a continuity test of the wiring.
Repair or replace the defective
wire.
Flap circuit-breaker opens
at the end of down
movement.
Micro-switch 4 defective. Replace the micro-switch.
Flap circuit-breaker opens
at the end of up movement.
Micro-switch 1 defective. Replace the micro-switch.
LDG LED stays on when
the flaps are not in the LDG
position. The other
indications operate
correctly.
Micro-switch 5 defective. Replace the micro-switch.
UP LED stays on when the
flaps are not in the UP
position. The other
indications operate
correctly.
Micro-switch 2 defective. Replace the micro-switch.
AIRCRAFT
Flight Controls DA 40 Series
AMM
Trouble Possible Cause Repair
Page 104
20 Sep 2007 27-50-00 Doc # 6.02.01
Rev. 5
T/O LED stays on when the
flaps are not in the T/O
position. The other
indications operate
correctly.
Micro-switch 3 defective. Replace the micro-switch.
Flaps move to LDG when
T/O set from UP.
Micro-switch 2 defective. Replace the micro-switch.
Flaps move to UP when
T/O set from LDG.
Micro-switch 5 defective. Replace the micro-switch.
AIRCRAFT
DA 40 Series
AMM
Flight Controls
Doc # 6.02.01
Rev. 5 27-50-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the components of the flap control system.
They also tell you how to test and adjust the system. See Section 57-50 for data about removing and
installing the flaps.
WARNING: WHEN YOU DO WORK ON THE AIRPLANE CONTROLS, YOU MUST MAKE
SURE THE AREAS AROUND THE CONTROLS/CONTROL SURFACES ARE
CLEAR OF PERSONS/EQUIPMENT. IF YOU DO NOT DO THIS, INJURY TO
PERSONS AND DAMAGE TO CONTROL SURFACES CAN OCCUR.
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钻石40系列AMM 2(8)
