Jim Metzger was injured when his twin-engine 1959 Aero Commander 680-E plane banked away from the runway and crashed at the north end of the airfield at about 4:20 p.m.
Metzger was alone in the seven-passenger plane. He was listed in critical condition Tuesday afternoon, said Joshua Schlaich, spokesman for Saint Alphonsus Regional Medical Center.
Metzger was hired in February to manage the Weiser Municipal Airport. He formerly operated a maintenance facility at Grove Field Airport in Camas, Wash., east of Vancouver.
The plane is registered to Metzger and his wife, Susan Metzger, at an address in Washougal, east of Camas, according to records from the Federal Aviation Administration.
Metzger is certified as a commercial pilot and mechanic, according to the FAA. He has flight ratings for single- and multi-engine planes and single-engine seaplanes. He is also instrument rated.
The crash is under investigation by the FAA, airport officials said. It’s unclear whether the National Transportation Safety Board will also conduct an investigation.
The airfield closed for about 40 minutes after the crash, disrupting commercial and private plane flights into and out of the Boise Airport until shortly after 5 p.m. Two Boise-bound commercial flights were diverted, and some outbound flights had to delay their takeoff times.