The aircraft with manufacturer serial number 21546 and line number 527 is a Boeing 737-291. It had its maiden flight on 1978-07-21. The last recordered registration was N981UA. The airframe is scrapped.
History:
Frontier Airlines, from 5th of August 1978, registered as N7395F Wien Air Alaska leased, from 20th of May 1982 Wien Air Alaska leased, from 29th of October 1983 United Airlines returned, from 1st of November 1985, registered as N981UA