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Figure 1(a) Three-dimensional Schematic View and Side View of the Standard Seat Assembly Indicating the Location of the Seat Belt Anchorage Points
Figure 1(b) Three-dimensional Schematic View and Side View of the Standard Seat Assembly Indicating the Location of the Lower Universal Anchorage System
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3.2 Test ConditionsFor the dynamic tests, the ambient temperature must be from 19°C to 26°C and the relative humidity from 10% to 70%. 3.3 Pre-Test Buckle Release Force MeasurementIf the belts of the restraint system are equipped with buckles, the release force of each buckle is to be measured in the following manner before commencing the dynamic tests. 3.3.1 Place the buckle assembly on a hard, level surface. 3.3.2 Apply a pullout force of 9 N to the buckle assembly in a direction that will produce maximum releasing effect, in the case of (a) A push-button-actuated buckle, at least 3.2 mm from the edge of the push-button access opening of the buckle, or (b) A lever-actuated buckle, on the centreline of the buckle lever or finger tab. 3.3.3 Measure the force required to release the buckle and determine its conformance to the requirements of Schedule 4 to the RSSRs. 3.4 Positioning of the ATD and Installation of the Restraint System for the Dynamic Test Using the Seat Belt Assembly3.4.1 In accordance with the manufacturer's instructions, place a new infant restraint system at the centre seating position of the standard seat assembly. If the restraint system is installed by passing the motor vehicle seat belt over the system and under the seated ATD, attach the seat belt to the restraint system, but do not tighten it. 3.4.2 Position the ATD specified in subsection 2.4 in accordance with the manufacturer's instructions and as follows: (a) With the ATD supine on a horizontal surface, and with a hand placed on its torso to prevent it from moving, lift the feet of the ATD until the legs touch the upper torso and the feet touch the head or as far as they will go. Slowly release the legs, allowing them to come to rest of their own accord. Do not return them to the flat surface. (b) Place the ATD in the infant restraint system so that its back is in contact with the seat back of the system. Attach the belts and harnesses of the system around the ATD. (c) Tighten the belts until a 9-N force applied using a webbing tension pull device (as illustrated in Figure 3) to the webbing at the top of each shoulder and, if applicable, to the pelvic webbing 50 mm on either side of the mid-sagittal plane of the torso pulls the webbing a distance of 7 mm away from the ATD. (d) Extend the ATD's arms upward horizontally and rotate them downward until they are in contact with a surface of the infant restraint system or the standard seat assembly. The movement of the arms must not be restricted in any but the downward direction. 3.4.3 In accordance with the manufacturer's instructions, attach the infant restraint system, if it is not already installed, to the standard seat assembly using the motor vehicle seat belt; attach the tether strap, if one has been provided; and tighten the seat belt and tether strap to a tension, as measured by a force gauge used on the webbing, of (a) until August 31, 2002, not less than 31 N and not more than 49 N or, at the option of the manufacturer, not less than 53.5 N and not more that 67 N; and (b) on or after September 1, 2002, not less than 53.5 N and not more
than 67 N.
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3.5 Test Procedure3.5.1 Accelerate the test platform in accordance with the requirements of subsection 3.1. 3.5.2 Measure the angle of the seat back and determine the conformance of the infant restraint system to the requirements of section 10 of Schedule 4 to the RSSRs. 3.6 Positioning of the ATD and Installation of the Restraint System for the Dynamic Test Using the Lower Universal Anchorage System3.6.1 Place a new infant restraint system at the centre seating position of the standard seat assembly in accordance with the manufacturer's instructions. 3.6.2 Place the ATD specified in subsection 2.4 in the infant restraint system and position it in accordance with the manufacturer's instructions and as follows: (a) With the ATD supine on a horizontal surface, and with a hand placed on its torso to prevent it from moving, lift the feet of the ATD until the legs touch the upper torso and the feet touch the head or as far as they will go. Slowly release the legs, allowing them to come to rest of their own accord. Do not return them to the flat surface. (b) Place the ATD in the infant restraint system so that its back is in contact with the seat back of the system. Attach the belts and harnesses of the system around the ATD. (c) Tighten the belts until a 9-N force applied using a webbing tension pull device (as illustrated in Figure 3) to the webbing at the top of each shoulder and, if applicable, to the pelvic webbing 50 mm on either side of the mid-sagittal plane of the torso pulls the webbing a distance of 7 mm away from the ATD. (d) Extend the ATD's arms upward horizontally and rotate them downward until they are in contact with a surface of the infant restraint system or the standard seat assembly. The movement of the arms must not be restricted in any but the downward direction. 3.6.3 Attach the lower connectors of the restraint system to the lower universal anchorage system and the tether strap, if one has been provided, to the standard seat assembly in the following manner: (a) Adjust rigid lower connectors in accordance with the manufacturer's instructions; (b) If a tether strap has been provided, tighten it to a tension
of not less than 53.5 N and not more than 67 N, as measured by a force
gauge used on the webbing. 3.7 Test Procedure3.7.1 Accelerate the test platform in accordance with the requirements of subsection 3.1. 3.7.2 Measure the angle of the seat back and determine the conformance of the infant restraint system to the requirements of subsection 13(1.1) of Schedule 4 to the RSSRs. 3.8 Infant Restraint Systems with a Separate BaseIn the case of a system that has a separate, removable base, the seating component of which may be used without the base, (a) Where lower connectors are supplied on the base only, the tests described in subsections 3.4 and 3.5 are to be conducted for the seating component and the tests described in subsections 3.4 to 3.7 are to be conducted for the base; (b) Where lower connectors are supplied on both the base and the
seating component, the tests described in subsections 3.4 to 3.7 are
to be conducted for both the base and the seating component. |
4. |
Buckle Release Test Procedure4.1 The release force of each buckle is to be tested with the ATD specified in subsection 2.4 of this test method retained in the restraint system and the system installed in a forward-facing direction. 4.2 The buckle release force is to be tested as follows: (a) Tie a self-adjusting sling to the wrists and ankles of the ATD, as illustrated in Figure 4. (b) While applying a pullout force of 9 N to the buckle assembly in a direction that will produce maximum releasing effect, pull the sling horizontally and parallel to the SORL of the standard seat assembly with a force of 90 N. Note: If the restraint system is equipped with a T-shield, a force equivalent to its mass must be added to the pullout force. Any shield, if present, may be adjusted to facilitate application of the pullout force, provided that the harness tension is not significantly affected. (c) In order to determine the buckle's conformance to the requirements of Schedule 4 to the RSSRs, apply the specified force in a direction that will produce maximum releasing effect, in the case of (i) A push-button-actuated buckle, at least 3.2 mm from the edge of the push-button access opening, or (ii) A lever-actuated buckle, on the centreline of the buckle lever or finger tab. (d) If the force required to release the buckle exceeds the requirements of Schedule 4 to the RSSRs, release the harness tension and apply a force of 22 to 44 N to the lowest accessible part of the tongue 2 to 4 times in each of four directions at 90-degree angles to each other. (e) Repeat paragraphs (b) and (c) above while applying a pullout force on the buckle assembly of 22 N, re-orienting the direction of the sling pull force if necessary so that the arms of the ATD do not load the shield. (f) If the buckle does not release at the force specified in Schedule
4 to the RSSRs, repeat paragraphs (b) and (c) once again using a
pullout force of 44 N. |
5. |
Energy Absorbing Material Test Procedure5.1 Prepare and test specimens of energy absorbing material in accordance with the applicable 25% compression-deflection test described in one of the following American Society for Testing and Materials (ASTM) Standards: - Standard Specification for Flexible Cellular MaterialsSponge or Expanded Rubber, Designation No. D 1056-91; - Standard Specification for Flexible Cellular MaterialsVinyl Chloride Polymers and Copolymers (Open-Cell Foam), Designation No. D 1565-81 (Reapproved 1990); or - Standard Test Methods for Flexible Cellular MaterialsSlab, Bonded, and Molded Urethane Foams, Designation No. D 3574-95. 5.2 Determine the conformance of the test specimens to the requirements of section 5 of Schedule 4 to the RSSRs.
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6. |
Inversion Test Procedure6.1 Each infant restraint system must meet and be tested in accordance with the requirements of subsections 6.2 through 6.6 of this test method when adjusted in any position. The manufacturer may use any seat that is a representative aircraft passenger seat within the meaning of subsection 2.1.1. 6.2 A representative aircraft passenger seat must be positioned and adjusted so that its horizontal and vertical orientation and its seat back angle are the same as those shown in Figure 5. 6.3 The infant restraint system must be attached in accordance with the instructions of the manufacturer of the restraint system to the representative aircraft passenger seat using, at the manufacturer's option, any aircraft safety belt approved by the U.S. Federal Aviation Administration or by Transport Canada's Director, Aircraft Certification. No supplementary anchorage belts or tether straps may be attached; however, safety belt extensions approved by the U.S. Federal Aviation Administration or by Transport Canada's Director, Aircraft Certification, may be used. 6.4 In accordance with the requirements of subsection 3.3.2, place and restrain the ATD specified in subsection 2.4 in the infant restraint system. 6.5 The combination of representative aircraft passenger seat, infant restraint system, and ATD must be rotated forward around a horizontal axis that is contained in the median transverse vertical plane of the seating surface portion of the aircraft seat and is located 25 mm below the bottom of the seat frame, at a speed of 35° to 45° per second, to an angle of 180°. The rotation must be stopped when it reaches that angle, and the seat must be held in this position for three seconds. The specified rate of rotation must be attained in not less than one-half second and not more than one second, and the rotating combination must be brought to a stop in not less than one-half second and not more than one second. 6.6 Repeat the procedure set forth in subsections 6.2 through 6.4. The combination of the representative aircraft passenger seat, infant restraint system, and ATD must be rotated sideways around a horizontal axis that is contained in the median longitudinal vertical plane of the seating surface portion of the aircraft seat and is located 25 mm below the bottom of the seat frame, at a speed of 35° to 45° degrees per second, to an angle of 180°. The rotation must be stopped when it reaches that angle, and the seat must be held in this position for three seconds. The specified rate of rotation must be attained in not less than one-half second and not more than one second, and the rotating combination must be brought to a stop in not less than one-half second and not more than one second. |
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