Safety Assumptions

Photo of Engine and Propeller Installation of Lockheed L-188 Electra
Engine and Propeller Installation of Lockheed L-188 Electra
Photo copyright Aris Pappas - used with permission
  • Prior to the Electra accident at Boston, power plants on large commercial airplanes were assumed to not be vulnerable to failing when struck by birds. As such, no bird strike/ingestion standards existed at the time that the Allison 501 engine or the Lockheed L-188 aircraft were developed and certified. As a result of knowledge gained from the investigation of this accident, and subsequent experiences on other engines and airplanes, turbine engines of large commercial airplanes being produced today exhibit a substantial bird strike resistance capability to a wide variety of threats.

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