{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":433,"name":"Learjet 45","note":"","unit":"registered","url":"https://eflight.com/models/learjet/45"},{"count":845,"name":"Learjet Inc","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/learjet-inc"},{"count":null,"name":"Built of aluminium","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/aluminium"}],"relation":"is a"},{"group":"Engine","items":[{"count":51,"name":"Honeywell TFE731-20AR","note":"3,650 lb thrust","unit":"aircraft with this engine series","url":"https://eflight.com/engines/honeywell-tfe731-20ar"}],"relation":"powered by"},{"group":"Owner","items":[{"count":1,"name":"Smm Aviation 1 LLC","note":"","unit":"aircraft registered to this organisation","url":"https://eflight.com/search?q=Smm Aviation 1 LLC"}],"relation":"owned by"},{"group":"Place","items":[{"count":1091,"name":"Oklahoma City, OK","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Okc Will Rogers International","note":"OKC","unit":"","url":"https://eflight.com/airports/OKC"},{"count":null,"name":"Wiley Post Airport","note":"PWA","unit":"","url":"https://eflight.com/airports/PWA"},{"count":null,"name":"Clarence E Page Municipal","note":"RCE","unit":"","url":"https://eflight.com/airports/RCE"},{"count":null,"name":"Sundance Airport","note":"HSD","unit":"","url":"https://eflight.com/airports/HSD"},{"count":5643,"name":"Oklahoma","note":"","unit":"aircraft registered","url":"https://eflight.com/states/OK"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"Incident on July 6, 2004 at Milwaukee, WI: no injuries, minor damage","note":"","unit":"","url":"https://eflight.com/accidents/CHI04IA178"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":32,"name":"FAA orders naming the Learjet 45","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/learjet/45#airworthiness"},{"count":779,"name":"Failure reports filed on the Learjet 45","note":"","unit":"reports since 1995","url":"https://eflight.com/models/learjet/45#airworthiness"},{"count":134,"name":"Approved modifications for the Learjet 45","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/learjet/45#airworthiness"},{"count":4,"name":"FAA orders naming the Honeywell TFE731-20AR","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/honeywell-tfe731-20ar#airworthiness"},{"count":11,"name":"Failure reports on the Honeywell TFE731-20AR","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/honeywell-tfe731-20ar#airworthiness"},{"count":null,"name":"Report filed on this aircraft: Oxygen Mask, leaking","note":"2023-04-13","unit":"","url":"https://eflight.com/systems/emergency"},{"count":null,"name":"Report filed on this aircraft: Isolation Valve, inoperative","note":"2022-04-01","unit":"","url":"https://eflight.com/systems/engine"},{"count":null,"name":"Report filed on this aircraft: Unlock Switch, faulty","note":"2022-01-12","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Learjet 45","note":"","unit":"","url":"https://eflight.com/models/learjet/45#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N87SK is now","note":"","unit":"","url":"https://eflight.com/live?q=N87SK"}],"relation":"seen at"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"inherited_from_model":true,"material":"aluminium","name":"aluminium","note":null},"id":"N87SK","maker":"Learjet Inc","model":"45","name":"Learjet Inc 45 N87SK","state":"OK","type":"aircraft","url":"https://eflight.com/aircraft/N87SK","year_built":2006},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
