{"as_of":"2026-10-26","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":18635,"name":"Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"registered","url":"https://eflight.com/models/piper/pa-28"},{"count":44844,"name":"Piper","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/piper"},{"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":27313,"name":"Lycoming O-320 series","note":"180 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/lycoming-o-320-series"}],"relation":"powered by"},{"group":"Owner","items":[{"count":13,"name":"Wifa (Washington International Flight Academy) LLC","note":"","unit":"aircraft in the fleet","url":"https://eflight.com/fleets/wifa-washington-international-flight-academy-llc"}],"relation":"owned by"},{"group":"Place","items":[{"count":66,"name":"Gaithersburg, MD","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Montgomery County Airpark","note":"GAI","unit":"","url":"https://eflight.com/airports/GAI"},{"count":2344,"name":"Maryland","note":"","unit":"aircraft registered","url":"https://eflight.com/states/MD"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"No NTSB accident or incident record under this tail number","note":"","unit":"","url":"https://eflight.com/aircraft/N2172D#records-check"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":90,"name":"FAA orders naming the Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/piper/pa-28#airworthiness"},{"count":3269,"name":"Failure reports filed on the Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"reports since 1995","url":"https://eflight.com/models/piper/pa-28#airworthiness"},{"count":697,"name":"Approved modifications for the Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/piper/pa-28#airworthiness"},{"count":29,"name":"FAA orders naming the Lycoming O-320 series","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/lycoming-o-320-series#airworthiness"},{"count":349,"name":"Failure reports on the Lycoming O-320 series","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/lycoming-o-320-series#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"","url":"https://eflight.com/models/piper/pa-28#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 N2172D is now","note":"","unit":"","url":"https://eflight.com/live?q=N2172D"}],"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":"N2172D","maker":"Piper","model":"PA-28-161","name":"Piper PA-28-161 N2172D","state":"MD","type":"aircraft","url":"https://eflight.com/aircraft/N2172D","year_built":1978},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}