ac greatest % of life in the air

In article ,
"patrick mitchel" wrote:

What ac has spent the greatest % of it's life in the air- excluding the ac
that crashed on it's first flight. Thanks Pat

Back in the '60s, SAC was very proud of one of the Looking Glass
KC-135's that was the high time aircraft in the USAF at something like
2700 hrs. That was about 75% of the time a 707 would get in one year.

Move forward to the 90's and the AA 767's going from DFW to Europe and
back daily were averaging about 20 hours aloft out of each 24.

On a slightly different tack, I recall a 727 with about 27000 hrs total
and one of the three engines was original and had never been off the
airframe.

--
Ron