On May 8, 1985, a Cessna 210E (registration N2367F) was involved in an aviation accident near Natchitoches, LA. Investigators recorded the probable cause as: Partial power loss due to ingestion of alternate air door shaft needle bearing rollers into the engine and cross firing of the right magneto. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot experienced partial power loss due to ingestion of needle bearing rollers and cross firing of the right magneto, leading to a gear-up forced landing. The aircraft slid across a ditch and stopped.
Accident Summary
The pilot experienced a partial power loss during flight. The power loss resulted from the ingestion of alternate air door shaft needle bearing rollers into the engine, combined with cross firing of the right magneto. In response, the pilot closed the throttle and executed a forced landing with the landing gear retracted. After touchdown, the aircraft slid across a small ditch before coming to a stop.
Post-Accident Examination
A post-accident examination of the engine was conducted. The examination revealed several loose clamps on the air induction tubes and evidence of cross firing from the right magneto. Internal inspection of the engine showed stuck compression rings on two pistons, as well as evidence of ingestion of the needle bearing rollers from the alternate air door shaft. The aircraft's last annual inspection had been performed approximately six months prior to the accident.
Probable cause
Partial power loss due to ingestion of alternate air door shaft needle bearing rollers into the engine and cross firing of the right magneto.
What happened in the 8 May 1985 Cessna 210E accident near Natchitoches, LA?
A pilot experienced partial power loss due to ingestion of needle bearing rollers and cross firing of the right magneto, leading to a gear-up forced landing. The aircraft slid across a ditch and stopped.
What aircraft was involved and where did it happen?
The accident on 8 May 1985 involved a Cessna 210E, registration N2367F, at Natchitoches, LA.
What was the probable cause of the accident?
Partial power loss due to ingestion of alternate air door shaft needle bearing rollers into the engine and cross firing of the right magneto.
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