Casualties unknown

2002-04-17: Piper PA-12 (N4480M) — Clifford, PA

Clifford, PA, US

On April 17, 2002, a Piper PA-12 (registration N4480M) was involved in an aviation accident near Clifford, PA. Investigators recorded the probable cause as: The pilot's failure to remain clear of trees during the final approach, which resulted in an impact with a tree and subsequent collision with a marsh. 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 familiar with the airport's tree-lined approach path struck a tree on the left side during landing, resulting in impact with a marsh area under sunny conditions.

What happened

The pilot, who was accustomed to landing at this specific airport, attempted a standard approach. The runway environment presented a unique visual challenge due to an approach path that cut directly through a stand of trees. At the time of the incident, the foliage had not yet developed for the spring season, which likely affected depth perception and obstacle identification.

As the aircraft descended along the established glide path, it struck a tree located on the left side of the approach corridor. Following the initial impact with the vegetation, the airplane continued forward and impacted a marsh area adjacent to the airport boundaries.

The investigation

Examination of the event revealed that the sun was positioned approximately 35 degrees to the left of the approach path and sat 28 degrees above the horizon. This lighting condition may have contributed to the visual difficulties encountered by the pilot navigating the tree-lined corridor.

A thorough review of the aircraft systems showed no evidence of a mechanical malfunction or failure that would have contributed to the accident. The sequence of events appears to be primarily related to spatial orientation and obstacle avoidance during the final approach phase.

Probable cause

The pilot's failure to remain clear of trees during the final approach, which resulted in an impact with a tree and subsequent collision with a marsh.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20020430X00595. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.