Pan American World Airways operated 128 707s, including the first six off of Boeing's production line as the mainstay of their fleet in the late 50s and 60s. Clipper Northern Light was leased from US Leasing Intl January 10, 1969. The aircraft was leased to Guyana Airways for three months before sale back to Boeing in September 1983. It was used for parts in the USAF KC-135E upgrade program.