• 58-1714 United States Army. Delivered 12-Jun-1959.
Initially assigned to 18th Aviation Company, Fort Riley, KS.
Unknown date. Aircraft not sent to Vietnam with the 18th, but taken over by the 1063rd Aviation Company instead, a unit of the Iowa National Guard, based at Waterloo, Iowa.
Oct-1961. 1063rd Aviation Company moved to Fort Riley, KS.
Mar-1962. Assigned to 17th Aviation Company at Fort Ord, CA.
May-1963. Transported to Vietnam and taken on charge by the 339th Transportation Company.
Jun-1963. Assigned to the 18th Aviation Company.
Aug-1966. Returned to the US and the Army Aeronautical Depot Maintenance Centre (ARADMAC) Depot, Corpus Christi, TX.
Note: Converted to RU-1A configuration.
Mar-1967: Returned to Vietnam joining the 145th Aviation Company, Tan Son Nhut, Saigon.
Jan-1971. Aircraft withdrawn from use. Taken over by the 388th Transportation Company, Vung Tau, and scrapped.
Jul-1971.Deleted from the Army inventory.
Otter 331 was delivered to the United States Army on 12th June 1959 with serial 58-1714 (tail number 81714). It was first assigned to the 18th Aviation Company, Fort Riley, Kansas. When that Company departed from Fort Riley in December 1961 to deploy to Vietnam, a number of its Otters, which were not then fit to travel, remained at Fort Riley, including 81714. The operation of these Otters was taken over by the 1063rd Aviation Company, a unit of the Iowa National Guard, based at Waterloo, Iowa. In October 1961, this unit was upgraded to Active Duty status and sent to Fort Riley, to operate the Otters which the 18th Aviation Company had left behind.
The 1063rd Aviation Company operated 81714 at Fort Riley until March 1962, when it joined the 17th Aviation Company at Fort Ord, California. In May 1963, a platoon of the 17th Aviation Company's Otters was sent to Vietnam, to augment the 18th Aviation Company. 81714 was one of this platoon, and on arrival in Vietnam, it was taken on charge by the 339th Transportation Company in May 1963 and made ready for service. It re-joined the 18th Aviation Company the following month, and flew for the Company until August 1966, when it was returned to the United States, arriving at the ARADMAC depot at Corpus Christi, Texas.
Here it was converted to RU-1A configuration and when this work was completed in March 1967, it returned to Vietnam and joined the 146th Aviation Company, based at Tan Son Nhut Air Base, Saigon, the unit which operated the RU-1As. It continued to fly for this unit until January 1971, when it was withdrawn from use and taken over by the 388th Transportation Company, Vung Tau, and scrapped. It was deleted from the Army inventory in July 1971.
Full history up to 2005 courtesy of Karl E Hayes © from DHC-3 Otter - A History (CD-ROM 2005)