On September 13, 1982, a Piper PA-25 (registration N9728P) operated by Charles Lawson was involved in an aviation accident near Red Level, AL. Investigators recorded the probable cause as: Rupture of a flexible oil line (SR2800-8-0390-64228-6 TSO C53A TYPE C SEPT 74 PT) resulting in loss of engine oil and pressure. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
While returning from crop spraying, a pilot experienced engine sound change and oil pressure loss. An emergency landing on an old highway resulted in collision with trees and a ditch after an oil line rupture.
Incident Overview
While returning to the airport after spraying crops, the pilot noted a change in the engine sound and noticed a loss of oil pressure. Anticipating an imminent engine failure, the pilot landed on a portion of an old highway that was clear of motor vehicles.
Landing and Collision
After rolling about 75 to 100 yards on a steep grade, the right wing tip hit small gum trees. On the opposite bank of the road were a dense clump of plum trees that were somewhat smaller. The pilot reported that the aircraft was precisely on the centerline of the road at about 50 mph when it struck the trees. The aircraft then swerved to the right and hit a ditch.
Examination Findings
An examination revealed that a flexible oil line (SR2800-8-0390-64228-6 TSO C53A TYPE C SEPT 74 PT) ruptured and allowed a loss of engine oil and pressure.
Probable cause
Rupture of a flexible oil line (SR2800-8-0390-64228-6 TSO C53A TYPE C SEPT 74 PT) resulting in loss of engine oil and pressure.