Table 4-2. Organizational Troubleshooting (continued)
TEST OR INSPECTION
ENGINE MOTORS ABOVE 10% RPM BUT NO LIGHT OFF.
Check that four-way valve control handle is set to correspond to fuel delivery source. If correctly
set, continue with the next step.
Check for draining from combuster drain line. If fuel is present continue with step 2.
Service or replace filters as required. and perform operational check.
If filters are ok continue with next step.
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).
Replace ignition unit if defective (paragraph 4-83). and perform operational check.
If ignition unit is ok, continue with next step.
Test fuel control unit (see malfunction 97).
a. Replace fuel control unit if defective (paragraph 4-67), and perform operational check.
If fuel control unit is ok, continue with next step.
Replace nozzle if defective, and perform operational check.
If nozzle tests ok, continue with next step.
Test N shutdown shutdown solenoid (see malfunction 98).
Replace shutdown solenoid if defective (paragraph 4-70). and perform operational check.
with next step.