On July 11, 1992, a Cessna 172L (registration N9871G) operated by Carlson, Donald K. was involved in an aviation accident near Delta, UT. Investigators recorded the probable cause as: THE FAILURE OF AN INTAKE VALVE AND THE POORLY EXECUTED FORCED LANDING. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a cross-country flight, the airplane experienced shaking and reduced engine RPM. The pilot landed downwind, resulting in multiple bounces and a runway excursion through a fence and beehive boxes. Post-crash inspection found a broken intake valve.
Incident Overview
During a pleasure cross-country flight, the airplane began to shake and the engine RPM decreased. The pilot diverted to a nearby runway and executed a landing downwind. Upon touchdown, the airplane bounced and continued to bounce for the length of the runway.
Runway Excursion
The airplane eventually settled as it ran off the end of the runway. It continued traveling through a barbed wire fence and beehive boxes before coming to rest.
Post-Crash Inspection
A post-crash inspection of the engine revealed that the number 4 intake valve was broken. Due to damage of the fracture ends, the failure mode was not determined.
What happened in the 11 Jul 1992 Cessna 172L accident near Delta, UT?
During a cross-country flight, the airplane experienced shaking and reduced engine RPM. The pilot landed downwind, resulting in multiple bounces and a runway excursion through a fence and beehive boxes. Post-crash inspection found a broken intake valve.
What aircraft was involved and where did it happen?
The accident on 11 Jul 1992 involved a Cessna 172L, registration N9871G, operated by Carlson, Donald K., at Delta, UT.
What was the probable cause of the accident?
THE FAILURE OF AN INTAKE VALVE AND THE POORLY EXECUTED FORCED LANDING.
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