Text in force at CAR3R-8: from CAR3R-0, effective 15 May 1956. OCR text
The fuselage Shall be designed to give reasonable assurance that each occupant, if he makes proper use of belts or harness for which provisions are made in the design, will not suffer serious injury during minor crash conditions as a result of contact of any vulnerable part of his body with any penetrating or relatively solid object, although it is accepted that parts of the airplane may be damaged.
(a) The ultimate accelerations to which occupants are assumed to be subjected shall be as follows:
(b) For airplanes having retractable landing gear, the fuselage in combination with other portions of the structure Shall be designed to afford protection of the occupants in a wheels-up landing with moderate descent velocity.
(c) If the characteristics of an airplane are such as to make a turnover reasonably probable, the fuselage of such an airplane in combination with other portions of the structure shall be designed to afford protection of the occupants in a complete turnover. Nore: In §3.386 (b) and (c), a vertical ultimate acceleration of 39 and a friction coefficient of 0,5 at the ground may be assumed.
(d) The inertia forces specified for N, U, and A category airplanes in paragraph (a) of this section shall be applied to all iterns of mass which would be apt to injure the passehgers or crew if such items became loose in the event of a minor crash landing, and the supporting Structure shall be designed to restrain these items.