Document ID: chunk:federal_register_of_legislation:F2006C00783:body:0:p14
Version: federal_register_of_legislation:F2006C00783
Segment Type: other
Provision Reference: 
Character Range: 38516–41536

single mechanical failure of a spring which is part of the locking mechanism
4.6.4.4.                        In cases when the operation of a retractor depends on an external signal or power source, the design shall ensure that the retractor locks automatically upon failure or interruption of that signal or power source.
4.6.4.5.                        The design of an 'Emergency Locking Retractor' shall ensure that it remains unlocked when the vehicle is tilted up to 12o, longitudinally or transversely, from the horizontal
4.7.                                    dynamic TEST REQUirements
4.7.1.                              'Seat Belt Assemblies' for front facing `Seats' shall not separate within themselves or from any 'Anchorage', when tested in accordance with the dynamic test procedure of Section 4.9.
4.7.2.                              Prior to the dynamic test, each `Seal Belt Assembly' shall be subjected to the preconditioning requirements of Clause 4.7.3.
4.7.3.                              Dynamic Test Preconditioning
4.7.3.1.                        Any 'Buckle Component' or manual adjusting device which can take up a position in a door opening, or under a pivoting `Seat', shall be placed on a flat surface in its most stable position and subjected to a force of not less than 1.8 kN for a period of not less than 10 seconds. The force shall be applied through a rigid bar of diameter not more than 20 mm formed to an arc of radius not more than 150 mm, with the bar in line with the `Strap' when viewed in plan, and the test shall be repeated with the bar normal to the direction of the `Strap' when viewed in plan.
4.7.3.2.                        The buckle assembly shall be subjected to not less than 20,000 unlatching operations. During each unlatching operation a tensile load of not less than 20 N shall be applied to the assembly.
4.7.3.3.                        Each `Seat Belt Assembly' which contains non-metallic material (other than a webbing 'Strap') shall be exposed to environment over a water surface within a closed space, the environment having a temperature of not less than 80oC, for a continuous period of not less than 24 hours and then cooled in an environment having a temperature not exceeding 23oC. The cooling period shall immediately be followed by three consecutive 24 hour cycles with each cycle comprising the following consecutive sequencer
4.7.3.3.1.                  an environment having a temperature of not less than 100oC shall be maintained for a continuous period of 6 hours and this environment shall be attained within 80 minutes of the cycle; then
4.7.3.3.2.                  an environment having a temperature of not more than 0oC shall be maintained for a continuous period of 6 hours and this environment shall be attained within 20 minutes; then
4.7.3.3.3.                  an environment having a temperature of not more than 23oC shall be maintained during the remainder of the 24 hour cycle.
4.8.                                    RETRACTOR