• 56-0404 US Army # 1727. L-20 No. 728. Command A-11. Delivered 27-Sep-1957. Built as L-20A and re-designated U-6A in 1962.
• N90793 Details currently unknown
• N4040W Wentworth Institute, Boston, MA. Regd Sep-1974
Note: P/e with Wentworth Institute of Technology logo on tailfin in 1982.
• N4040W North East Coast Aero Technical School. Lexington, ME. On USCAR at 02-Mar-1990.
• N4040W Sourdough Air Services Inc.,Bettles, AK. Regd 29-Apr-1991. On USCAR at 29-Feb-1992.
• N4040W Stephen D Ruff, Bettles dba ????, AK. Regd May-1994. On USCAR at 01-Oct-1994.
• N4040W Jay A Jesperson, Bettles Field, AK. Regd 02-Jul-1997. Canx 26-Jul-2004.
• N4040W Jespersen Aircraft Services Inc.,Bettles, AK. Operating with Brooks Range Aviation, Bettles, AK. Regd 18-Apr-2005.
• N4040W Brooks Range Aviation Inc dba as Brooks Range Aviation shown as operator at time of accident reported below.
Incident: Anaktuvuk Pass, Near Bettles, AK 01-Aug-2006. The airline transport certificated pilot was transporting passengers from a remote lake in a float-equipped airplane under Title 14, CFR Part 135. He said that during takeoff he passed his predetermined point to abort the takeoff without becoming airborne, and felt that he had to proceed with the takeoff or hit the shoreline. The pilot said that he was able to become airborne, but struck the shore of the lake with the airplane's floats just after lift off. He stated that he was concerned about damage to the floats from the impact with the shore, and elected to land on a hard surface runway at the destination airport. The float structure collapsed during landing, resulting in substantial damage to the fuselage. There were no known mechanical anomalies with the airplane prior to the accident. Pilot and five passengers uninjured. NTSB report ANC06LA109.
Total time 12,700 hours at Aug 2006. (Accident report actually shows 127,000hrs).
N4040W Jefferson Aircraft Services Inc., Bettles Field, AK. Regd 18-Apr-2005.
Accident: Bettles, AK 15-Jul-22022. Pilot and three passengers uninjured. Substantial damage to port float and wing. See top image taken after recovery by S-61 to Fairbanks. ANC22LA056