On June 22, 1982, a Grumman G-164A (registration N9684) operated by Riceland Aviation Inc. was involved in an aviation accident near Jennings, LA. Investigators recorded the probable cause as: The separation of the number four connecting rod, which led to internal engine damage and subsequent power loss during flight. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
An agricultural aircraft experienced an in-flight engine failure while returning to the airport after a spraying mission, resulting in a forced landing where the plane nosed over due to ground ruts.
What happened
The pilot had just completed a crop dusting operation and was en route back to the home base when the aircraft's engine ceased functioning. With power lost, the pilot identified an adjacent field with grass cover as a suitable site for an emergency landing. During the rollout on the uneven terrain, the aircraft struck several ruts in the ground, causing the nose gear to collapse and the aircraft to nosed over.
The investigation
Post-accident examination by the operator revealed significant internal engine damage. Specifically, the connecting rod from cylinder number four had become detached. This failure caused the corresponding piston to be driven excessively far into the cylinder bore, which in turn fractured the head from the barrel of that cylinder.
Probable cause
The separation of the number four connecting rod, which led to internal engine damage and subsequent power loss during flight.
What happened in the 22 Jun 1982 Grumman G-164A accident near Jennings, LA?
An agricultural aircraft experienced an in-flight engine failure while returning to the airport after a spraying mission, resulting in a forced landing where the plane nosed over due to ground ruts.
What aircraft was involved and where did it happen?
The accident on 22 Jun 1982 involved a Grumman G-164A, registration N9684, operated by Riceland Aviation Inc., at Jennings, LA.
What was the probable cause of the accident?
The separation of the number four connecting rod, which led to internal engine damage and subsequent power loss during flight.
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