TM 55-1520-240-T
4-10.3 ENGINE START AND IGNITION SYSTEM VISUAL CHECK
4-10.3
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-23
With 74
Equipment Condition:
Tools:
TM 55-1520-240-23:
Electrical Repairer's Tool Kit,
Battery Disconnected
NSN 5180-00-323-4915
Electrical Power Off
Materials:
Hydraulic Power Off
None
Engine Work Platforms Open
Engine Access Covers Open
Personnel Required:
Aircraft Electrician
TASK
RESULT
1.
Check FADEC panel (1).
If switch (2) is loose or damaged, tighten or replace it as
required.
2.
Check DECU No. 1 (3).
If DECU No. 1 (3) is loose or damaged, tighten or replace
it. If any connector is loose, tighten or replace it. If any
wire in DECU connectors is broken or damaged, repair or
replace it.
3.
Check DECU No. 2 (4).
If DECU No. 2 (4) is loose or damaged, tighten or replace
it. If any connector is loose, tighten or replace it. If any
wire in DECU connectors is broken or damaged, repair or
replace it.
4.
Check No. 1 engine pilot valve (5).
If valve (5) is loose or damaged, tighten or replace it as
required. If wiring or connector to valve is damaged,
repair or replace it as required.
5.
Check No. 2 engine pilot valve (6).
If valve (6) is loose or damaged, tighten or replace it as
required. If wiring or connector to valve is damaged,
repair or replace it as required.
6.
Check No. 1 engine (7).
If ignition exciter (8) is damaged, replace it. If ignition coil
and cable assembly (9) is damaged, replace it. If any one
of four spark plugs (10) is damaged, replace it. If start fuel
solenoid valve (11) is damaged, replace it. If harness (12)
to exciter (8) and valve (11) is damaged, replace it.
7.
Check No. 2 engine (13).
If ignition exciter (8) is damaged, replace it. If ignition coil
and cable assembly (9) is damaged, replace it. If any one
of four spark plugs (10) is damaged, replace it. If start fuel
solenoid valve (11) is damaged, replace it. If harness (12)
to exciter (8) and valve (11) is damaged, replace it.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Close engine access covers.
Close engine work platforms.
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4-224 Change 17
