My doors latch tight, don't seem to have excessive play in the hinges, but airborne, you can see light through the gap created at the top rear of the doors where they pull away from the fuselage. I know on old cars you simply bend the top of the doors in toward the roof, but I'm not too sure that I want to try such a procedure on the airplane.

Thoughts?

Is that with stock windows or bubble windows? Airflow around the latter can cause some air seepage in flight.
-DP

I can't speak to the issue of bending the doors, but I can say that it makes a huge difference if the weather stripping is good or worn out. It does wear out with time, and there are much better versions now than when your airplane was built.

A year or so ago, I replaced the weather stripping around the pilot window, and now it seals very much better. Although it never leaked moisture, now I no longer feel cold air on my shoulder. That one was very easy to install.

Just this past year I also replaced the weather stripping on the baggage door of my airplane--made it awfully hard to close for awhile--but now it's sealed well when closed, whereas in the past not only would air leak in but also moisture when I flew through rain, or the airplane had to sit out in a rain. This seal was an absolute pain in the neck to install--it probably would have been easier without the baggage door on the airplane, but I didn't want to take it off.

This is the outfit from which I bought both weather stripping: https://www.aircraftdoorseals.com/

Cary

Are you sure the top rear of the door/s are "pulling away" or are you just noticing that the seal is worn out?

Maybe sit in it while parked and look back again as another check/clue.

Maybe check log books for prior damage, even though there are those who fix and fly without any written confessions.

Just shotss in the dark. CC

Weatherstripping is good, doors are tight on the ground. There has been damage history something like 30 years ago. I've seen this phenomenon on car doors, where they are tight when not in motion, but pull away as the speed increases. There too the weatherstripping was in good shape.