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  • Chapter 3: Identifying Hazards & Associated Risks › Leading Accident Causes

    System Component Failure Powerplant (SCF-PP)–This category includes a variety of hazards, some which the pilot or operator may not easily identify. If a pilot experiences difficulty with an engine run-up or experiences ... engine issue after maintenance, a significant hazard may exist. 11805 4. Fuel-Related–Pilots still experience fuel starvation or fuel exhaustion. Misunderstanding or mishandling the aircraft's fuel system, a lack of adequate planning, trying to stretch aircraft fuel range…

  • Glossary

    ratio of the weight of the air to that of the fuel in the mixture fed into the cylinders of an engine. Air impingement starter. A turbine engine starter that basically consists of a nozzle that blows a stream ... compressed air against the turbine blades to rotate the compressor for starting the engine. Air-oil separator. A component in a turbine engine lubrication system that removes the air from the scavenged oil before it is returned…

  • Chapter 2: Engine Fuel & Fuel Metering Systems › Basic Fuel System

    During starting, the boost pump forces fuel through a bypass in the engine-driven pump to the metering device. Once the engine-driven pump is rotating at sufficient speed, it takes over and delivers fuel to the metering device ... specified pressure. The airframe fuel system begins with the fuel tank and ends at the engine fuel system. The engine fuel system usually includes the engine-driven pumps and the fuel metering systems. In aircraft powered with a reciprocating engine…