A few of the large number of Boeing 707s and 720s bought by Boeing in the 1980s to facilitate the conversion of KC-135As to turbofan power. The airliners donated their engines, pylons and throttle pedestals, as well as horizontal stabilisers, all of which were needed to carry out the upgrade. In this image, taken in rather dull weather, ex-Conair 720B TF-AYB (previously OY-APW) is on the left and on the right is ex-Saudia 707 N1673B (previously HZ-ACD). Both had arrived earlier in 1987.