{"as_of":"2026-10-09","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Where","items":[{"count":null,"name":"Springfield, TN","note":"the town on the certificate","unit":"","url":""},{"count":null,"name":"Springfield Robertson County","note":"M91","unit":"","url":"https://eflight.com/airports/M91"},{"count":6517,"name":"Tennessee","note":"","unit":"aircraft registered","url":"https://eflight.com/states/TN"},{"count":24,"name":"Aircraft registered in Springfield","note":"","unit":"registered","url":"https://eflight.com/aircraft?city=Springfield&state=TN"}],"relation":"works in"},{"group":"Certificate","items":[{"count":null,"name":"FAA repair station certificate (Part 145)","note":"DMAR323E","unit":"","url":""}],"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":"DMAR323E","city":"Springfield","country":"United States","id":"darkhorse-maintenance-llc","name":"Darkhorse Maintenance LLC","state":"TN","type":"repair-station","url":"https://eflight.com/repair-stations/darkhorse-maintenance-llc"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}