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  • Chapter 10. Helicopter Operations › Section 2. Special Operations › 10-2-3. Landing Zone Safety

    typically prominently marked. If possible, operators should familiarize ground responders with the door system on their helicopter in preparation for an emergency event. (2) In the event of an accident during the LZ operation, be cautious of hazards such ... fire sources, such as the fuel tank(s) and the engine. (b) Fire Suppression: Helicopters used in HEMS operations are usually powered by turboshaft engines, which use jet fuel. Civil HEMS aircraft typically carry between 50 and 250 gallons…

  • Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Annual & 100-Hour Inspections › Preparation

    and proper safetying; the propeller for nicks, cracks, and oil leaks; the…

  • Chapter 8: Engine Removal & Replacement › Preparing the Engine for Removal

    operated by engine oil pressure. Preparing the Engine for Removal Before starting to work on the aircraft or reciprocating engine, always be sure that the magneto switch is in the off position. Aircraft engines can be started accidentally by turning ... propeller if the magneto switch is on. Check to see that all fuel selectors or solenoid-operated fuel shutoff valves are closed. The fuel selector valves are either manually or solenoid operated. If solenoid-operated fuel shutoff valves are installed…