TM
55-1730-229-12
AG
320A0-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
Table 4-2. Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE MOTORS ABOVE 10% RPM BUT NO LIGHT OFF.
21.
Step 1.
Check that four-way valve control handle is set to correspond to fuel delivery source. If correctly
set, continue with the next step.
Step 1.1
Check for draining from combuster drain line. If fuel is present continue with step 2.
Step 1.2
Inspect auxiliary fuel filter (paragraph 4-65) and FCU fuel filter (paragraph 4-69).
a.
Service or replace filters as required. and perform operational check.
b.
If filters are ok continue with next step.
Step 2.
Disconnect connector from ignition unit fuel control unit and shutdown solenoid. Inspect
connector pins for corrosion. clean as required reconnect connectors .
If still no light off, do step 3.
Test ignition unit (see malfunction 96).
Step 3.
a.
Replace ignition unit if defective (paragraph 4-83). and perform operational check.
b.
If ignition unit is ok, continue with next step.
Step 4.
Test fuel control unit (see malfunction 97).
a. Replace fuel control unit if defective (paragraph 4-67), and perform operational check.
b.
If fuel control unit is ok, continue with next step.
Step 5.
Remove, inspect, and clean fuel nozzle (paragraph 4-68).
a.
Replace nozzle if defective, and perform operational check.
b.
If nozzle tests ok, continue with next step.
Step 6.
Test N shutdown shutdown solenoid (see malfunction 98).
Replace shutdown solenoid if defective (paragraph 4-70). and perform operational check.
a.
b.
If solenoid tests ok, continue
with next step.
