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YOKE COLUMN
Posted: Mon Aug 30, 2004 12:00 pm
by derf62
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
Posted: Mon Aug 30, 2004 12:28 pm
by doug8082a
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.
Posted: Mon Aug 30, 2004 4:39 pm
by GAHorn
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.)
Posted: Tue Aug 31, 2004 7:34 pm
by Curtis Brown
Doug, who did your re-chroming and what was the cost. Also, I would assume the yoke handles are removed. Correct?
Posted: Tue Aug 31, 2004 8:38 pm
by doug8082a
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.