{"as_of":"2026-10-29","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Aircraft","items":[{"count":null,"name":"N4174P: not on the register today","note":"the record of its deregistration","unit":"","url":"https://eflight.com/aircraft/N4174P"},{"count":1043,"name":"Engine: Lycoming IO-540-AE1A5","note":"as the NTSB recorded it","unit":"aircraft carry this series today","url":"https://eflight.com/engines/lycoming-io-540-ae1a5"}],"relation":"involved"},{"group":"Place","items":[{"count":null,"name":"Ramona Airport","note":"nearest airport","unit":"","url":"https://eflight.com/airports/RNM"},{"count":null,"name":"Montgomery-Gibbs Executive","note":"departed from","unit":"","url":"https://eflight.com/airports/MYF"},{"count":9069,"name":"Accidents and incidents in California","note":"1,087 in the last ten years","unit":"since 1982","url":"https://eflight.com/accidents?state=CA"},{"count":27673,"name":"California","note":"","unit":"aircraft registered","url":"https://eflight.com/states/CA"}],"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":"Valley Center","date":"2009-09-20","fatalities":0,"id":"WPR09LA460","name":"Robinson Helicopter Company R44 II accident near Valley Center, California, September 20, 2009","state":"CA","type":"ACC","url":"https://eflight.com/accidents/WPR09LA460"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}