Text in force at 23-63: from 23-48, effective 11 Mar 1996.
(a) Control surface hinges, except ball and roller bearing hinges, must have a factor of safety of not less than 6.67 with respect to the ultimate bearing strength of the softest material used as a bearing.
(b) For ball or roller bearing hinges, the approved rating of the bearing may not be exceeded.
[(c) [Removed.]]
61 FR 5148 · Source