{"as_of":"2026-10-08","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Where","items":[{"count":null,"name":"Madison, WI","note":"the town on the certificate","unit":"","url":""},{"count":null,"name":"Dane County Rgnl/Truax Field","note":"MSN","unit":"","url":"https://eflight.com/airports/MSN"},{"count":null,"name":"Blackhawk Airfield","note":"87Y","unit":"","url":"https://eflight.com/airports/87Y"},{"count":6160,"name":"Wisconsin","note":"","unit":"aircraft registered","url":"https://eflight.com/states/WI"},{"count":178,"name":"Aircraft registered in Madison","note":"","unit":"registered","url":"https://eflight.com/aircraft?city=Madison&state=WI"}],"relation":"works in"},{"group":"Certificate","items":[{"count":null,"name":"FAA repair station certificate (Part 145)","note":"DBKR124D","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":"DBKR124D","city":"Madison","country":"United States","id":"wisconsin-aviation-four-lakes-inc","name":"Wisconsin Aviation - Four Lakes INC","state":"WI","type":"repair-station","url":"https://eflight.com/repair-stations/wisconsin-aviation-four-lakes-inc"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}