{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":28,"name":"Hph Ltd GLASFLUGEL 304","note":"","unit":"registered","url":"https://eflight.com/models/hph-ltd/glasflugel-304"},{"count":30,"name":"Hph Ltd","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/hph-ltd"},{"count":null,"name":"Built of composite","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/composite"}],"relation":"is a"},{"group":"Place","items":[{"count":159,"name":"San Luis Obispo, CA","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"San Luis Obispo County Regional","note":"SBP","unit":"","url":"https://eflight.com/airports/SBP"},{"count":27610,"name":"California","note":"","unit":"aircraft registered","url":"https://eflight.com/states/CA"}],"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/N304BL#records-check"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":3,"name":"FAA orders naming the Hph Ltd GLASFLUGEL 304","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/hph-ltd/glasflugel-304#airworthiness"},{"count":1,"name":"Approved modifications for the Hph Ltd GLASFLUGEL 304","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/hph-ltd/glasflugel-304#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Hph Ltd GLASFLUGEL 304","note":"","unit":"","url":"https://eflight.com/models/hph-ltd/glasflugel-304#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 N304BL is now","note":"","unit":"","url":"https://eflight.com/live?q=N304BL"}],"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":"composite","name":"composite","note":"A glass-fibre glider."},"id":"N304BL","maker":"Hph Ltd","model":"GLASFLUGEL 304CZ","name":"Hph Ltd GLASFLUGEL 304CZ N304BL","state":"CA","type":"aircraft","url":"https://eflight.com/aircraft/N304BL","year_built":2000},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
