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Post-Maintenance Tests

It certainly wont come as a surprise to an owner to see someone write that aircraft maintenance is fraught with surprises. One of mine came on the first flight after an extensive inspect-and-repair-as-necessary effort involving my mid-1960s Bonanza. Since the interior was out of the plane for other work, my IA and I decided to install new gear-motor brushes, which are expensive little beggars, even for a Beechcraft. Soon, we had everything back, buttoned up and were ready for a test flight. As he is fearless, and I wanted the company, my IA came along for the ride from my towered home airport.

Gemini Sparkle

Key Takeaways:

  • A pilot experienced a landing gear malfunction on the first flight after installing new gear-motor brushes in a Bonanza, requiring an emergency manual extension for a safe landing.
  • The unexpected issue was attributed to new brushes needing a "run-in" period, a crucial step not documented in the aircraft's maintenance manual, leading to the motor being sent for overhaul.
  • The incident highlights the unpredictable nature of aircraft maintenance, even when procedures are followed, and emphasizes the value of having an extra set of eyes and hands during post-maintenance test flights.
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It certainly wont come as a surprise to an owner to see someone write that aircraft maintenance is fraught with surprises. One of mine came on the first flight after an extensive inspect-and-repair-as-necessary effort involving my mid-1960s Bonanza.

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