ARMY TM 9-6115-670-14&P 4-15 4. ENGINE STOPS SUDDENLY. STEP 1. Check for tripped protective devices (OIL PRESSURE, WATER TEMP, LOW FUEL, OVERSPEED AND OVER VOLTAGE). a.  If there are tripped protective devices, correct fault indicated.  See SYMPTOMS 24- 27. b.  If there are no tripped protective devices, proceed to step 2. STEP 2. Check for low or no fuel level condition. a.  If fuel level is low, refill fuel tank. b.  If fuel tank has fuel, proceed to step 3. STEP 3. Check for loose fuel line connections, obstruction in fuel lines, and air in fuel lines. a.  If the fuel line connections are loose, the fuel lines contain an obstruction or there is air in fuel lines, tighten fuel line connections, remove the obstruction from the fuel supply lines or replace the fuel lines and bleed air from fuel system (para 4.35.). b.  If the fuel line connections are tight, the fuel supply lines contain no obstructions and the fuel system does not require bleeding, proceed to step 4. STEP 4. Check fuel filter sediment container for water and contaminated fuel, incorrect grade or fuel type. a.  If the fuel is contaminated, drain entire fuel system including vehicle fuel tank and APU day tank (para 4.32. or 4.33.).  Replace fuel filter (para 4.30.).  Service with proper grade fuel.  Bleed fuel system. b.  If the fuel is not contaminated, notify next higher level of maintenance.