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msn 59
DHC-6 Twin Otter Series 100
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Series 100



• Registration • Activity and details of Owner/Operator and other historical information

N512S de Havilland Canada Inc., Downsview, ON. Rolled out Sep-1967. First flight 29-Sep-1967

N512S Sinclair Oil & Gas, West Yellowstone, MT. Delivered 15-Dec-1967.

N512AR Re regd to Sinclair Oil & Gas, Jun-1969 on merger with Atlantic Richfield Corporation, Anchorage, AK.

N512AR Name changed to Atlantic Richfield Corporation, Anchorage, AK. Regd 02-Jul-1970.

Accident: Prudhoe Bay, AK. 01-Dec-1970. A student pilot started a go-around. The instructing pilot reduced power and the pilot thought the instructor had control. Aircraft was damaged in hard landing short of the runway. Repaired and returned to service.

Accident: Prudhoe Bay, AK, 31-May-1972. Damaged after leaving runway following rejected take-off. Failed to maintain directional control with ice and slush on the runway and ran off the left hand side of runway. The aircraft suffered substantial damage. It was repaired and returned to service.

N512AR Leased to Sea Airmotive (Seair), Anchorage, AK. Regd Sep-1978.

N512AR Returned to Atlantic Richfield Corporation, Anchorage, AK. Regd 1986.

Note: Returned by 09-Apr-1986 when (the original) Seair filed for bankruptcy.

• N512AR Sold to ERA Aviation, Anchorage, AK. Regd 15-Aug-1990.

• N512AR Sold to James van de Voord, Anchorage, AK. Remained operated by ERA 1994.

• N512AR Sold to RDD Investment, Georgetown, Grand Cayman. Regd 29-Dec-1994.

• N512AR Sold to Glen & Robin Ernst, San Diego CA. Regd 10-Oct-1995.

• N512AR Sold to Twin Otter International, Las Vegas, NV. Regd 30-May-1997.

• N512AR Sold to John R Siebold. Operated by Twin Otter International, Las Vegas, NV., 01-Dec-1997.

• N512AR Sold on to Bristol Ltd., North Las Vegas, NV. Operated by Twin Otter International, Las Vegas, NV. Regd 01-Dec-1997 & 23-Mar-1998.

Note: Twin Otter International appears to have registered many of its Twin Otter aircraft under subsidiary companies using the names of now defunct British Aircraft Manufacturers.

• N512AR Twin Otter International Ltd., Las Vegas, NV. Regd 31-Dec-2002 & 14-Aug-2003.

Airworthiness date: 15-Feb-2008 Restricted; Aerial Surveying. Has received an extendable sensor dome under the rear fuselage. Appears to have a series 200 nose.

• Current •


N512AR at Calgary - CYYC, Alberta.
Photo: John Kimberley © September 1978 - Kenneth I. Swartz Collection - Aird Archives
Photo: Anthony J. Hickey © November 1978 - Michael J. Ody Collection
N512AR at Anchorage - PANC, Alaska.
Photo: Chris Buckley © April 1990 - Michael J. Ody Collection
N512AR at Albuquerque - KABQ, New Mexico.
Photo: Martijn Koetsier © 21 August 2022 - Aird Archives