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- THE MIXTURE CONTROL IS SET TO “LEAN CUT-OFF”.
A. Remove The Ignition Switch Cables
Detail Steps/Work Items Key Items
(1) Disconnect the airplane battery. Refer to Chapter 24-31
(2) Remove the engine cowlings. Refer to Chapter 71-10
(3) Disconnect the spark plug leads from the
spark plugs.
(4) Remove the instrument panel cover. Refer to Chapter 25-10
(5) Disconnect the switch cable (P lead) at the
left/right magneto.
(6) Disconnect the ground connections at the
left/right magnetos.
(7) Cut the Ty-wraps that hold the switch cables.
(8) Disconnect the left/right electrical cables
from the ignition switch.
Record the cable connections.
(9) Disconnect the ground connections at the
switch.
(10) Loosen the bulkhead shield. Pull the ignition
cables through he shield. Remove the
ignition switch cables.
DA20-C1 AMM
Ignition
Doc # DA 201-C1
Rev. 9 74-00-00 Page 205
29 Apr 2004
B. Install The Ignition Switch Cables
Detail Steps/Work Items Key Items
(1) Make sure that the spark plug leads are
disconnected from the spark plugs. And the
battery is disconnected.
Refer to Chapter 24-31
(2) Put the new cables in position through the
bulkhead shield. Tighten the bulkhead
shield.
(3) Connect the ground connector to ground. Refer to the Chapter 92
(4) Do a test for the correct operation of the
ignition switch:
− Set the ignition switch to OFF.
− Set the ignition switch to R.
− Set the ignition switch to L.
− Set the ignition switch to BOTH
− Set the ignition switch to START.
− Set the ignition switch to OFF.
Do a resistance test between each switch
cable and ground for each switch setting.
− Both cables zero ohms.
− Left zero ohms, right open circuit.
− Left open circuit, right zero ohms.
− Both cables open circuit.
− Left retard point cable open circuit,
right and left advance cable zero ohms.
(5) Connect the switch cables (P leads) at the
left/right magneto.
Refer to the Chapter 92
(6) Connect the ground connector at the
left/right magneto.
Refer to the Chapter 92
(7) Install the Ty-wraps that hold the ignition
switch cables.
(8) Install the instrument panel cover, Refer to Chapter 25-10.
(9) Connect the battery. Refer to Chapter 24-31.
(10) Connect the ignition leads to the spark
plugs.
Torque to 12.4-13.5 Nm (110-120 in lbs).
(11) Install the engine cowlings. Refer to Chapter 71-10.
(12) Do an engine run up test. Refer to the DA20-C1 Flight Manual.
Ignition
DA20-C1 AMM
Page 206
19 Dec 1997 74-00-00 Doc # DA 201-C1
Rev. 0
5. Remove/Install The Spark-Plug Leads
WARNING: YOU MUST MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU
DO WORK ON THE IGNITION SYSTEM. DISCONNECT THE SPARK
PLUG LEADS. MAKE SURE THAT:
- THE IGNITION SWITCH IS IN THE “OFF” POSITION.
- THE “P” LEADS ARE GROUNDED.
- THE THROTTLE IS SET TO “CLOSED”.
- THE MIXTURE CONTROL IS SET TO “LEAN CUT-OFF”.
A. Remove The Spark-Plug Leads
Detail Steps/Work Items Key Items
(1) Remove the engine cowlings. Refer to Chapter 71-10
(2) Disconnect the spark-plug leads from the
spark plugs.
(3) Disconnect the spark-plug leads from the
left/right magnetos.
Record the cable connections.
(4) Cut the Ty-wraps that hold the spark-plug
leads.
(5) Remove the left and right shields from the aft
baffle:
− Remove the four screws and nuts from
the left shield.
− Remove the four screws and nuts from
the right shield.
(6) Carefully pull the four spark-plug leads
through the aft baffle and remove.
(7) Remove the four spark plug leads that
connect to the bottom spark plugs.
DA20-C1 AMM
Ignition
Doc # DA 201-C1
Rev. 9 74-00-00 Page 207
29 Apr 2004
B. Install The Spark-Plug Leads
Detail Steps/Work Items Key Items
(1) Before you install the spark-plug leads do a
test on each cable for a short circuit from the
center core to the sheath.
Use a high voltage tester (Megger). If you
get a short circuit, then replace the sparkplug
lead.
(2) Connect the spark-plug leads to the left/right
magnetos.
Refer to the Chapter 92
(3) Put the top spark plug leads in position
through the aft baffle:
− The leads for 1 and 3 top spark plugs
through the left side of the aft baffle.
− The leads for 2 and 4 top spark plugs
through the right side of the aft baffle.
　
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