Overall Trends
Total, fatal, and serious accidents in the selected range.
Search investigations, review source evidence, monitor watched reports, and trace long-term patterns from one calm, data-first workspace.
Fast key and full-text search with live filters, watches, and precise metadata.
Use quotes for exact phrase matches (for example "fuel selector valve").
Track fatal and non-fatal accident patterns across Part 91, Part 135, and Part 121 operations.
Major cases, deep-report coverage, and investigation media across decades of NTSB history.
Move quickly by aircraft, airport, operator, and time with indexes built for research, not wandering.
NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.
The goal is practical safety education: make it faster to find relevant investigations, compare similar events, review factual records, and understand the evidence behind probable-cause and preliminary reports.
The investigative work and source records belong to the National Transportation Safety Board and the published investigation record. This site is not affiliated with or endorsed by the NTSB.
Mineral Wells, TX
During a flight test, the unmanned aircraft’s flight control computer registered a low battery voltage reading and entered an automatic land in place flight maneuver. The aircraft was hovering over a large bush at the time and the ground station operator (GSO) attempted to override the system, but the system rejected the commands. The GSO attempted to change the land in place waypoint, but the system again rejected the command. The aircraft performed its land in place maneuver and collided with the bush, which resulted in the aircraft tipping over and coming to rest inverted. The operator reviewed the aircraft systems and found the low voltage threshold to be overly restrictive. In addition, software prevented the flight crew from overriding the land in place command and regaining control of the aircraft by changing the waypoint.
The flight crew’s loss of control of the unmanned aircraft due to software limitations. Contributing to the accident was the overly restrictive low voltage threshold limits.
On March 14, 2023, about 1030 central daylight time, a Bell Textron APT70 unmanned aircraft, N314AL, was substantially damaged when it was involved in an accident near Mineral Wells, Texas. The aircraft was operated under the provisions of Title 14 Code of Federal Regulations Part 91 as a flight test. During the flight test, the aircraft returned to base and was in a transition to hover when the flight control computer registered a low battery voltage reading and went into an emergency automatic land in place flight command. The GSO attempted to override the system, but the system rejected the commands. The crew then noted the “F BATT CRIT LOW VOLT” warning illuminated, which initiated a descent for the aircraft to land at its present position. At the time, the aircraft was in a hover at an altitude of about 100 ft above the ground over a large bush when the Land Failsafe command was activated. A command was sent to the vehicle to override the landing command, but the ground control station indicated that the override command was rejected. The GSO then attempted to change the land in place waypoint, but the system again rejected the command. The aircraft performed its land in place maneuver and collided with a shrub, which resulted in the aircraft tipping over and coming to rest inverted. Substantial damage was sustained to the lower left wing section. The operator reviewed the aircraft systems and found the low voltage threshold to be overly restrictive. In addition, a software limitation prevented the crew from overriding the land in place command by changing a waypoint.