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Water Wings

Gemini Sparkle

Key Takeaways:

  • After a 1976 Cessna 210L was left exposed to weather at a paint shop, the pilot experienced recurring and escalating engine sputtering issues, despite initial attempts to drain water from the fuel tanks.
  • Initial maintenance misdiagnosed the problem as a dirty injector, but the sputtering persisted and worsened, leading to aborted takeoffs and dangerous in-flight incidents.
  • The root cause was eventually identified as oxidized aluminum particles in the fuel distributor, formed by water accumulation in the fuel system during the aircraft's extended outdoor stay.
  • The experience highlights the critical need for comprehensive fuel system inspection after lengthy maintenance periods, especially if an aircraft has been exposed to the elements, and warns against shops that leave planes unprotected.
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After an extended period at the paint shop, during which my 1976 Cessna 210L Centurion sat outside in the central Florida weather awaiting additional work for a few weeks, the airplane was finally finished. I have to admit I was pleasantly surprised that the plane looked so great and I was eager to take it home.

I did a very careful preflight, checking all the movable surfaces for correct action, and I drained all the fuel sumps more than once. It seemed there was a noticeable amount of water in the fuel tanks, causing me to drain the sumps a few more times. When I fired up the engine after a rough start, it settled down and seemed to be producing power normally. I taxied out and departed without incident, and flew back to the airplane’s home base. A few days later, I took a local flight and once again checked the fuel for water. The engine ran well and my flight was uneventful, as were several subsequent local flights.

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