ED Decision 2003/13/RM
(a) The factor of safety for bearings at bolted or pinned joints must be multiplied by a special factor of 2.0 to provide for:
(1) relative motion in operation; and
(2) joints with clearance (free fit) subject to pounding and/or vibration.
(b) For control surface hinges and control system joints, compliance with the factors prescribed in CS 22.657 and CS 22.693, respectively, meets sub-paragraph (a) of this paragraph.