On July 16, 1988, a Cessna R172K (registration N736HQ) operated by Z-air was involved in an aviation accident near Corona, CA. Investigators recorded the probable cause as: Improper adjustment and restricted movement of the mixture control arm. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During takeoff, the engine failed to develop full power, and the aircraft collided with trees about 500 feet beyond the runway. Examination revealed improper adjustment and restricted movement of the mixture control arm.
Incident
During the takeoff roll, the engine did not achieve full power. The aircraft subsequently collided with trees located approximately 500 feet beyond the end of the runway.
Examination
A post-accident examination of the engine found that the mixture control arm at its attachment point on the fuel pump housing had restricted movement and was improperly adjusted. When the cockpit mixture control was set to the full rich position, the actual mixture was found to be set to approximately a mid-range position. Any rearward movement of the mixture control from the full rich position caused the engine to shut down.
Probable Cause
The investigation determined that the improper adjustment and restricted movement of the mixture control arm led to the engine failing to develop full power, resulting in the collision with trees.
What happened in the 16 Jul 1988 Cessna R172K accident near Corona, CA?
During takeoff, the engine failed to develop full power, and the aircraft collided with trees about 500 feet beyond the runway. Examination revealed improper adjustment and restricted movement of the mixture control arm.
What aircraft was involved and where did it happen?
The accident on 16 Jul 1988 involved a Cessna R172K, registration N736HQ, operated by Z-air, at Corona, CA.
What was the probable cause of the accident?
Improper adjustment and restricted movement of the mixture control arm.
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