Brake performance question?

[n86121]

I have had the same 337 for over 25 years, and all that time the brakes barely hold past about 50 percent takeoff power. It starts creeping along, Normal?

I just had both brake cylinders and calipers redone / overhauled, and the same.

Mechanic was freaked out that he couldn't hold the airplane at takeoff power, but I told him its always been that way and not to worry.

Do you use metallic or organic pads?

Preferences?

Thoughts?