Casualties unknown

Nighttime Spin Over Water Leads to Loss of Aircraft and Pilot (N6376P)

Long Boat Key, FL, US

On May 31, 1991, a Piper PA-24-250 (registration N6376P) operated by Mutz, Dale was involved in an aviation accident near Long Boat Key, FL. Investigators recorded the probable cause as: The pilot's failure to maintain aircraft control during a nighttime flight over water, attributed to the directional gyro malfunction which led to spatial disorientation. 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 2026-06-10Data APIEditorial standards

An aircraft disappeared from radar while flying incorrect headings due to directional gyro failure. Witnesses saw it spin into the water at night; only one body was recovered.

What happened

Air traffic control observed an aircraft deviating significantly from its assigned flight path, maintaining headings that differed from those requested by controllers. The crew reported experiencing malfunctions with the directional gyro, which likely contributed to their navigation difficulties. While operating over water during nighttime conditions, the aircraft vanished from both radar displays and radio communications.

The investigation

Search efforts were hampered by the lack of visual confirmation until witnesses on a nearby beach observed the aircraft in a spin before impacting the water surface. The wreckage was not recovered due to these circumstances. Recovery teams located only one pilot's body, indicating that the other occupant was not found.

Findings

The incident involved critical instrument failure during night flight over water. Directional gyro malfunction led to spatial disorientation or loss of situational awareness. The aircraft entered a spin, resulting in a fatal crash into the water. One fatal, with the remaining occupant missing and presumed deceased.

Safety message

Instrument failures at night over water require immediate adherence to instrument flight rules and emergency procedures. Pilots must be prepared for rapid loss of control if navigation aids fail without visual references.

Probable cause

The pilot's failure to maintain aircraft control during a nighttime flight over water, attributed to the directional gyro malfunction which led to spatial disorientation.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17064. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.