The purpose of this presolicitation notice is to provide a corrected North  American Industry Classification (NAICS) Code. The original presolicitation  notice with a posted date of 10 April 2006 provided the NAICS Code as 541330,  which was incorrect. The correct NAICS Code is 541710. Please refer to  Solicitation Reference Number N00019-06-P7-ZD180 for the complete synopsis and  all synopsis modifications. This information may also be viewed at the NAVAIR  website at http://www.navair.navy.mil. Select Doing Business, then select  Open Solicitations, then Solicitation Number N00019-06-R-0052.