Interpretation ID: aiam4361
Safety Engineering
Mercedes-Benz of North America
Inc.
P. O. Box 350
Montvale
NJ 07645;
Dear Mr. Baloga: Thank you for your letter of May 12, 1987, to Stephen Oesch of my staf concerning the requirements of Standard No. 208, *Occupant Crash Protection.* You asked the agency to confirm that the 36 millisecond time interval be used in the calculation of the head injury criterion (HIC) applies both to the Part 572, Subpart B test dummy and to the Subpart E test dummy. This is to confirm that the 36 millisecond time interval should be uSed in the calculation of a HIC for both types of test dummies.; On October 17, 1986 (51 FR 37028), NHTSA published a final rule in th Federal Register amending Safety Standard No. 208, *Occupant Crash Protection*. One of the amendments modified the manner in which a HIC is calculated in the crash testing required by the standard. That amendment referred to S6.2 as the provision of the standard containing the HIC requirement. Instead, the notice should have amended S6.1.2, which sets out the HIC calculation for the Part 572, Subpart B test dummy, and S6.2.2, which sets out the HIC calculation to be used with the new Part 572, Subpart E test dummy. The agency will publish an amendment to adopt the necessary changes to S6.1.2 and S6.2.2 to make clear that the change to the calculation of the HIC criterion affects those two provisions.; If you need further information, please let me know. Sincerely, Erika Z. Jones, Chief Counsel