On February 22, 1990, a Grumman G-164A (registration N930X) was involved in an aviation accident near Glynn, LA. Investigators recorded the probable cause as: The right brake intermittently stuck due to the parking brake lever holding onto wear grooves on the actuator rod. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During an agricultural positioning landing on a road, the right tire skidded and the airplane exited the right side, crossing a ditch and a drainage canal. Investigation found the right brake master cylinder actuator rod was scored, causing intermittent brake sticking due to the parking brake lever engaging wear grooves.
Introduction
The aircraft was being repositioned for an agricultural operation. During landing on a road, the right tire began skidding, and the airplane departed the right side of the road. It traversed a small ditch and a drainage canal before coming to rest on the opposite bank of the canal.
Inspection Findings
Post-accident inspection revealed that the right brake master cylinder actuator rod was scored and exhibited wear marks. The brake was found to intermittently stick, maintaining pressure on the right brake. The sticking was attributed to the parking brake lever engaging the wear grooves on the actuator rod.
Probable cause
The right brake intermittently stuck due to the parking brake lever holding onto wear grooves on the actuator rod.