Table 2-2. Operator/Crew Preventive Maintenance Checks and Services (Contd). ITEM NO. INTERVAL ITEM TO CHECK/ SERVICE PROCEDURE NOT FULLY MISSION CAPABLE IF: TM 9-2320-386-10 2-35 30 After Air Check air cleaner indicator (6) at Yellow band is seen Operation cleaner bottom of instrument panel. If yellow on the indicator (Contd) indicator band is showing after air cleaner has with engine running been serviced, air intake system or air and the filter cannot cleaner indicator tube are clogged. be cleaned or Notify unit maintenance. replaced. 31 Horn Check operation if tactical situation permits. 32 Fuel shutoff switch Move fuel shutoff switch (7) to ON Engine does not position to turn off fuel to the engine. stop. 6 WARNING If tachometer shows engine idling at high RPM and fuel shutoff switch does not stop engine, do not attempt to stall engine. Notify your supervisor. Attempting to stall engine at high RPM may result in injury or death to personnel. NOTE If tachometer shows engine is idling at normal RPM and battery switch does not stop engine, engage fuel shutoff switch to stall engine. 7