{"as_of":"2026-10-08","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Where","items":[{"count":null,"name":"Midland, TX","note":"the town on the certificate","unit":"","url":""},{"count":null,"name":"Midland International Air And Space Port","note":"MAF","unit":"","url":"https://eflight.com/airports/MAF"},{"count":null,"name":"Midland Airpark","note":"MDD","unit":"","url":"https://eflight.com/airports/MDD"},{"count":null,"name":"Skywest INC Airport","note":"7T7","unit":"","url":"https://eflight.com/airports/7T7"},{"count":29858,"name":"Texas","note":"","unit":"aircraft registered","url":"https://eflight.com/states/TX"},{"count":334,"name":"Aircraft registered in Midland","note":"","unit":"registered","url":"https://eflight.com/aircraft?city=Midland&state=TX"}],"relation":"works in"},{"group":"Certificate","items":[{"count":null,"name":"FAA repair station certificate (Part 145)","note":"QA9R719J","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":"QA9R719J","city":"Midland","country":"United States","id":"haeffner-donald-l","name":"Haeffner, Donald L.","state":"TX","type":"repair-station","url":"https://eflight.com/repair-stations/haeffner-donald-l"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}