Wing lift is unbalanced

[Terrys]

I had some corosion on a wing flap.  I had the flap replaced with the correct flap but now the wing with the replaced flap has more lift than the other and I have to counter with the ailerons. It makes keeping level flight very uncomfortable.  Searching the internet has not provided any help.  I'm looking for suggestions how to remedy this

[Jim Peace]

5 hours ago, Terrys said:

I had some corosion on a wing flap.  

how much was there?  where was it?  could not treat the original flap while still on the plane?

[Ragsf15e]

1 hour ago, Terrys said:

I had some corosion on a wing flap.  I had the flap replaced with the correct flap but now the wing with the replaced flap has more lift than the other and I have to counter with the ailerons. It makes keeping level flight very uncomfortable.  Searching the internet has not provided any help.  I'm looking for suggestions how to remedy this

That’s actually relatively common if the flap stops aren’t adjusted properly.  You might want to look very carefully at the flaps in the up position and see if they match.  Someone who knows exactly how to adjust that will be along with better advice/descrptiin:

[takair]

Simple starting point without rigging tools:  aileron counterweights cantered on the wing…in other words, ailerons level….do the flaps match with the ailerons or is one high or low?  Also, old Mooneys only had a stop outboard.  I believe this causes them to warp (twist) over time.  People then adjust the stops to counter for that.  Your new flap may have more or less twist.  Eyeball them from behind and see if they have different twist.  In either case, the stops may need tweaking.

[EricJ]

Another simple, rough-ish starting point to check flap rigging is just to put a straight edge down the top of the wing.   The upper surface of the flap should align reasonably well with the back portion of the wing surface.   That'll give you an idea if something is significantly off, and be able to compare the two sides.    This works anywhere along the wing, but obviously isn't a precision measurement.

[Kelpro999]

 If left & right flaps appear in good alignment then they weren’t beforehand. This makes a good candidate for complete rigging verification. Who knows, you might experience some new found efficiencies and handling characteristics. 

[N201MKTurbo]

There are only two adjustments on the flaps. The link and the stop. To do the link, put the flaps all the way down and use an angle gauge toget the new flap to match the other flap. Then go fly the airplane and adjust the new stop till there is no heavy wing. Move the stop 1/2 turn at a time.