The Piper PA-23 was one of the first twin-engine light aircraft available in the United States.  It was introduced in 1954 as the four-seat Apache.  The popularity of the design led Piper to develop the larger six-seat Aztec that also incorporated more powerful engines.  In 1960, the U.S. Navy purchased twenty Aztecs for use as short-range transports designating them UO-1.  They were also used to allow Navy pilots who had been assigned non-flying duties to maintain their skills and flight pay.  The designation was changed in 1962 to U-11.  The Aztecs remained in Navy service until the mid-1970s.

Service History:

Built by Piper Aircraft Company, Lock Haven, Pennsylvania and delivered to the U.S. Navy on October 25, 1960.

October 1960              To Alameda Naval Air Station, California.

March 1976                 To North Island Naval Air Station, California.

November 1976          To Davis-Monthan AFB, Arizona for storage.

December 1982   Loaned to Pima Air and Space Museum by the National Naval Aviation Museum.

Manufacturer
Piper

Markings
Alameda Naval Air Station, 1976

Designation
U-11A

Serial Number
149067