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Aircraft Engine Oil Checks

This months accident easily could have resulted from perhaps the most insidious preflight challenges: interruptions. Being interrupted in the middle of, say, refueling or checking the engine oil can have severe consequences. The trick for me always has been to start over after the interruption is resolved. If this means leaving passengers in the FBO lobby until Im ready, or missing a clearance void time, so be it. If it means answers to a passengers questions must be postponed, thats okay, too. Interruptions during a preflight inspection are insidious because they allow us to consider a task complete when it isnt. Well never know if an interruption during the preflight inspection helped cause this months accident, but its as good an explanation as any.

Gemini Sparkle

Key Takeaways:

  • Familiarity and interruptions during preflight inspections can lead to critical errors, such as failing to secure an engine component.
  • An Ercoupe accident was caused by oil exhaustion and engine failure due to an unsecured oil filler cap, leading to the pilot's death.
  • The pilot's pre-existing medical condition, for which his medical certificate had been denied, significantly complicated his recovery from injuries and ultimately proved fatal.
See a mistake? Contact us.

If one spends enough time flying personal airplanes, what once was new and novel eventually becomes normal. Preflight inspection tasks like wiggling control surfaces, sampling fuel and checking the engine meet this test. In addition to verifying the paperwork, checking weather and TFRs, and a general walk-around, these tasks are the ones we (should) perform before each flight.

But familiarity breeds contempt, and I’d be willing to bet someone out there has a bell curve demonstrating the effectiveness of a preflight inspection peaks around the time we earn our private certificate. When we’re still a student, part of the curriculum includes how to conduct a preflight inspection, what to examine and how. After that, we’re on our own for the most part, and often abbreviate our preflight inspection of aircraft with which we’re familiar. It’s not the smartest thing, but we do it anyway

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