Casualties unknown

1986-10-02: Piper PA-30 (N7533Y) — Sulpher, LA

Sulpher, LA, US

On October 2, 1986, a Piper PA-30 (registration N7533Y) was involved in an aviation accident near Sulpher, LA. Investigators recorded the probable cause as: The pilot's decision to land long on a wet grass airstrip with reduced braking action, necessitating a ground loop that resulted in structural damage. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot executed a deliberate ground loop on a wet grass airstrip to avoid entering a ditch, resulting in collapsed nose gear and wing damage.

What happened

The pilot landed the aircraft at an extended distance on a private grass airstrip. Due to recent rainfall, the runway surface was wet, which significantly reduced braking effectiveness. The pilot reported little to no braking action during the landing roll.

To prevent the aircraft from overrunning the end of the runway and entering a three-foot deep ditch, the pilot deliberately initiated a ground loop maneuver. During this controlled turn, the nose gear collapsed under the stress. As the aircraft slid sideways across the end of the runway, it crossed over the ditch, causing damage to both wings and the main landing gear.

The investigation

The post-accident examination revealed that the nose gear had failed structurally during the ground loop. The wings and main landing gear sustained damage from sliding across the terrain at the runway threshold. The wet conditions of the grass strip were confirmed as a contributing factor to the reduced traction.

Findings

The primary factors leading to this incident were the long landing distance and the subsequent loss of braking capability due to the wet surface. The pilot's decision to ground loop was a direct response to the imminent hazard of the ditch at the end of the airstrip. This maneuver, while preventing a more severe overrun accident, resulted in significant structural damage to the aircraft.

Safety message

Pilots operating on private or uncontrolled grass airstrips should be aware that wet conditions can drastically reduce braking performance. Planning for longer landing distances and having an escape plan for runway ends is critical when weather conditions are poor.

Probable cause

The pilot's decision to land long on a wet grass airstrip with reduced braking action, necessitating a ground loop that resulted in structural damage.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34958. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.