Document ID: chunk:federal_register_of_legislation:F2006L02678:body:0:p14
Version: federal_register_of_legislation:F2006L02678
Segment Type: other
Provision Reference: 
Character Range: 39650–42642

requirement shall be met at an extrapolated point representing full extension based on test results achieved at points of extension which are less than the full extensions by 150 + 5 mm, 450 + 5 mm, and 750 + 5 mm (if available), respectively.
4.6.4.3.                        An 'Emergency Locking Retractor' shall be designed to lock automatically, or meet the requirements of clauses 4.6.4.1 and 4.6.4.2 upon any single mechanical failure of a spring which is part of the locking mechanism.
4.6.4.4.                        In cases where 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 12°, longitudinally or transversely, from the horizontal.

4.7.                                    DYNAMIC TEST REQUIREMENTS
4.7.1.                               'Seatbelt Assemblies' for front facing 'Seats' shall not separate within themselves or from any 'Anchorage', when tested in accordance with the dynamic test procedure of clause 4.9.
4.7.2.                              Prior to the dynamic test, each 'Seatbelt 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 'Seatbelt 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 80°C, for a continuous period of not less than 24 hours and then cooled in an environment having a temperature not exceeding 23°C.  The cooling period shall immediately be followed by three consecutive 24 hour cycles with each cycle comprising the following consecutive sequences:
4.7.3.3.1.                  an environment having a temperature of not less than l00°C shall be maintained for a continuous period of 6 hours and this environment shall be