AMC2 NCO.IDE.A.140 Seats, seat safety belts, restraint systems and
child restraint devices
UPPER TORSO RESTRAINT SYSTEM
(a) The following systems are deemed to be compliant with the requirement for an upper torso restraint system:
(1) A seat belt with a diagonal shoulder strap;
(2) A restraint system having a seat belt and two shoulder straps that may be used independently;
(3) A restraint system having a seat belt, two shoulder straps and additional straps that may be used independently.
(b) The use of the upper torso restraint independently from the use of the seat belt is intended as an option for the comfort of the occupant of the seat in those phases of flight where only the seat belt is required to be fastened. A restraint system including a seat belt and an upper torso restraint that both remain permanently fastened is also acceptable.
A seat belt with a diagonal shoulder strap (three anchorage points) is deemed to be compliant with the requirement for a seat belt (two anchorage points).
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