On July 27, 1991, an Ayres S2R (registration N3087D) operated by Gilbert Aviation Industries was involved in an aviation accident near Visalia, CA. Investigators recorded the probable cause as: The failure of the master rod to the number 1 cylinder, which was likely caused by a lack of oil in the engine sump. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.
An agricultural aircraft lost engine power and crashed into terrain while conducting a spraying operation. Investigation revealed a failed master rod and lack of oil in the engine sump.
What happened
The aircraft was engaged in an agricultural spraying operation when it experienced a sudden loss of engine power. As a result of this mechanical failure, the aircraft collided with the terrain.
The investigation
Following the accident, investigators conducted an external examination of the engine to determine the cause of the power loss. The inspection revealed that the master rod associated with the number 1 cylinder had failed. Additionally, inspectors noted a complete lack of oil in the engine oil sump. No other discrepancies were found during the examination.
Probable cause
The failure of the master rod to the number 1 cylinder, which was likely caused by a lack of oil in the engine sump.
What happened in the 27 Jul 1991 Ayres S2R accident near Visalia, CA?
An agricultural aircraft lost engine power and crashed into terrain while conducting a spraying operation. Investigation revealed a failed master rod and lack of oil in the engine sump.
What aircraft was involved and where did it happen?
The accident on 27 Jul 1991 involved an Ayres S2R, registration N3087D, operated by Gilbert Aviation Industries, at Visalia, CA.
What was the probable cause of the accident?
The failure of the master rod to the number 1 cylinder, which was likely caused by a lack of oil in the engine sump.
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