Table 4-3. Organizational Troubleshooting-Continued
TEST OR INSPECTION
2. ENGINE CRANKS AT NORMAL SPEED WILL NOT START-continued
If there is fuel in auxiliary tank, test fuel transfer pump (see paragraph 4-52).
If the fuel transfer pump is functioning, check for clogged lines between transfer pump and day
tank, and between the day tank and fuel filter assembly.
Check that fuel oil is reaching fuel injectors as the engine is being cranked.
Disconnect fuel return line going to fuel tank (see figure 4-29). Use a suitable container to catch
If fuel oil is present at fuel return, refer malfunction to next higher level of maintenance.
If fuel oil is absent, reconnect fuel return. Disconnect fuel line at input of secondary fuel filters
(see figures 4-40 and 4-48), and check for the presence of fuel oil.
If fuel oil is present, replace secondary fuel filters (see paragraphs 4-75).
Check EMERGENCY SHUT DOWN switch S22 (20, figure 4-18).
Check that switch is in OFF position; if ON, replace switch (see paragraph 4-32).
Check ENG FAULT OVERSPEED indicator lamp.
If lamp is lit, operate ANNUNCIATOR RESET switch. If lamp goes out, recrank engine. If lamp
remains lit check for 24V DC across coils of speed switch SS3 (see figures 4-40 and 4-42).
To check this component refer to FO-3 to determine where these points are electrically accessible
to meter probes.
If voltage is present, SS3 may be defective and must be referred to next higher maintenance.
Using a multimeter, check for 24V DC across fuel solenoid L1 (see figure 4-40).