YOKE COLUMN

derf62 · Post by **derf62** » Mon Aug 30, 2004 12:00 pm

I have been wanting to clean up the Yoke's and the columns. When discussing with my IA he informs me that the typical chrome re-finish on the columns is not allowable. Something about a flat chrome that was PMA??? Anybody knowledgeable?

I also have found out that the powder coating of the yoke is NOT allowable either because it may hide cracks.

INPUT APPRECIATED. FRED AT 35KY

doug8082a · Post by **doug8082a** » Mon Aug 30, 2004 12:28 pm

Chroming is allowed for the control columns. The only "catch" is that they need to be baked for 3 hours @ 350 deg. F. to remove any hydrogen embrittlement. Just had mine done... Look great and with the new control bushings, they're as smooth as butter.

Post by **GAHorn** » Mon Aug 30, 2004 4:39 pm

Correct, Doug! Any certified aviation plater can chrome plate and treat for hydrgen embrittlement. (Besides baking for 3-4 hours at 350F, another method is to submerge in a 177 degree-Centigrade oil bath for 2 hours.)

Curtis Brown · Post by **Curtis Brown** » Tue Aug 31, 2004 7:34 pm

Doug, who did your re-chroming and what was the cost. Also, I would assume the yoke handles are removed. Correct?

doug8082a · Post by **doug8082a** » Tue Aug 31, 2004 8:38 pm

Yes we had to remove the yokes, but I was going to remove them anyway to have them painted so it wasn't an issue. The chroming was done by a (relatively) local shop in CT. I think it was $65, but I'd have to double check.