{"as_of":"2026-10-09","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Where","items":[{"count":null,"name":"Hagerstown, MD","note":"the town on the certificate","unit":"","url":""},{"count":null,"name":"Hagerstown Rgnl/Richard A Henson Field","note":"HGR","unit":"","url":"https://eflight.com/airports/HGR"},{"count":2341,"name":"Maryland","note":"","unit":"aircraft registered","url":"https://eflight.com/states/MD"},{"count":51,"name":"Aircraft registered in Hagerstown","note":"","unit":"registered","url":"https://eflight.com/aircraft?city=Hagerstown&state=MD"}],"relation":"works in"},{"group":"Certificate","items":[{"count":null,"name":"FAA repair station certificate (Part 145)","note":"J8UR891Y","unit":"","url":""},{"count":4,"name":"Other locations of Sierra Nevada Company, LLC","note":"","unit":"certificates","url":"https://eflight.com/repair-stations/sierra-nevada-company-llc#locations"}],"relation":"holds"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"certificate":"J8UR891Y","city":"Hagerstown","country":"United States","id":"sierra-nevada-company-llc","name":"Sierra Nevada Company, LLC","state":"MD","type":"repair-station","url":"https://eflight.com/repair-stations/sierra-nevada-company-llc"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}