Aero Vintage Books

In the Februray 1944 edition of "Air Force", on page 45, it is told that Roswell AAF in NM had a B-17F named "Slugger' that currently held the record for flying without an Engine Change: 900 hours. All on her original, from the factory Engines. I have no idea how that stacks up with modern maintenance, but was considered the quite the feat in WW2

Found it here:https://media.defense.gov/2011/Apr/20/2 ... 20-027.pdf

That's quite a record for even 1820s! It sounds like they had a good maintenance and inspection program to get that kind of hours.

As a point of reference, we had a 767 a few years ago that got over 49,000 hours out of an original GE CF-6. At that time it was the world record first-run CF-6 but may have been surpassed by now.