B - Before A - After M - Monthly D - During W - Weekly C - Combat Operability Check Item Interval Item to be Procedures Check for and have repaired For Readiness Reporting Equipment is Not No. B   D   A  W  M   C Inspected or adjusted as necessary Ready/Available if: TM 9-4540-202-12&P 2-2.  GENERAL-Continued Table 2-1.  Operator/Crew Preventive Maintenance Checks and Services - Continued NOTE Within designated Interval, these checks are to be performed In the order listed. 3     FUEL TANK Check that the fuel tank is filled with the correct fuel. Check that the fuel tank is prop- erly installed. Check that fuel tank vent is in the open position.        Inspect for leaks and spilled fuel.   Evidence of fuel leakage. Drain the fuel tank. 4     FUEL Check that the fuel valve controls VALVE the flow of fuel just below the smoke level. 5 WATER Inspect the water level to make LEVEL sure that it is six inches below the top of the heater collar. 6 BURNER Inspect for clean condition. ASSEMBLY Check that it is installed correctly in heater body. 7 SMOKE- Inspect for security and dean STACK condition. Check that it is assembled and installed correctly. 2-4