• 58-2055 US Army # 1935. L-20 No. 936. Command A-16. Delivery date unknown. Built as L-20A and re-designated U-6A in 1962.
• 58-2055 Stored at MASDC., Davis Monthan AFB., AZ. Unknown start - 07-Feb-1972. Inventory code HS085.
• N9290Z Harold J. Hansen, Seattle, WA, Leased to Island Air Service. Regd Feb-1976.
• N9290Z Kodiak Western AK Airlines Inc. Circa. May-1977.
• N9290Z Robert G. Stanford / Redemption Inc., Island Air Service Inc., Kodiak, AK. Regd 01-Dec-1987. On USCAR at 02-Mar-1990, 29-Feb-1992 & 01-Oct-1994.
Airworthiness date: 19-May-1993 .
• N9290Z Taquan Air Service Inc., Ketchikan, AK. Dates unknown.
Incident: Ketchikan Harbour, 26-Jun-1999. Bird Strike. A flock of up to 10 Bald Eagles were fishing and as the aircraft was on take take-off run they dived to the sea for fish and then tried to get out of the way. One bird hit a stabiliser and another hit the left float. Birds did not survive. Aircraft damage unrecorded.
• N9290Z Kirk M. Thomas Trustee, Ketchikan, AK. Regd 03-Dec-1999. Canx 18-Apr 2005.
• N9290Z Radial Power Enterprises LLC., Ketchikan, AK. Regd 11-May-2005. Canx 22-Aug-2005 & 17-May-2011. Operated by Pacific Airways Inc., Ketchikan, AK..
Note: In Pacific Airways Ketchikan, AK marks since Sep-2000 at least.
Accident; Ward Cove, Ketchikan, AK. 23-Jul-2010. Whilst The pilot had been advised by the Federal Aviation Administration flight service station (FSS) specialist to remain clear of the destination airport until the specialist could issue a special visual flight rules clearance. Instrument meteorological conditions prevailed at the airport, with a strong southeasterly wind. About 8 minutes after initial contact, the FSS specialist attempted to contact the pilot to issue the clearance but received no response. A witness about 0.5 mile southeast of the accident site said he saw the accident airplane flying very low over the treetops. He said the weather conditions consisted of low clouds, rain, and gusty southeasterly wind estimated at 30 to 40 knots. He said that, as the airplane passed overhead, it turned sharply to the left. As he watched the airplane, the wings rocked violently from side to side, and the nose pitched up and down. As the airplane passed low over hilly, tree-covered terrain, it rolled to the right, the right wing struck a large tree and separated, and the airplane descended behind a stand of trees. Pilots flying in the accident area reported strong wind with significant downdrafts and turbulence. A post accident examination of the airplane did not disclose any pre-impact mechanical malfunctions. Given the lack of mechanical deficiencies and the reports of turbulence and downdrafts, as well as the witness’ account of the airplane’s physical movements, it is likely that the pilot encountered significant terrain-induced turbulence and downdrafts while flying at low altitude. The area surrounding the accident site and portions of the pilot's earlier flight path were bordered by large areas of open and protected water, several of which were suitable for landing the float-equipped airplane.