{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Aircraft","items":[{"count":null,"name":"N99031 on the register today","note":"the tail number may have moved to another aircraft since","unit":"","url":"https://eflight.com/aircraft/N99031"},{"count":35,"name":"Piper L-21","note":"the model family and its accident history","unit":"registered today","url":"https://eflight.com/models/piper/l-21"},{"count":44847,"name":"Piper","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/piper"},{"count":180,"name":"Engine: Lycoming O-320-A2B","note":"as the NTSB recorded it","unit":"aircraft carry this series today","url":"https://eflight.com/engines/lycoming-o-320-a2b"}],"relation":"involved"},{"group":"Place","items":[{"count":null,"name":"Big Timber AT Howard Field","note":"departed from","unit":"","url":"https://eflight.com/airports/6S0"},{"count":1119,"name":"Accidents and incidents in Montana","note":"164 in the last ten years","unit":"since 1982","url":"https://eflight.com/accidents?state=MT"},{"count":6037,"name":"Montana","note":"","unit":"aircraft registered","url":"https://eflight.com/states/MT"}],"relation":"at or near"},{"group":"Analytics","items":[{"count":null,"name":"Accidents over time since 1982","note":"","unit":"","url":"https://eflight.com/analytics/accidents-over-time"},{"count":null,"name":"Accidents by phase of flight, weather and hour","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-phase"},{"count":null,"name":"The accident map","note":"","unit":"","url":"https://eflight.com/analytics/accident-map"}],"relation":"counted in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"city":"Big Timber","date":"2017-07-08","fatalities":0,"id":"WPR17LA145","name":"Piper L 21B accident near Big Timber, Montana, July 8, 2017","state":"MT","type":"ACC","url":"https://eflight.com/accidents/WPR17LA145"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}