Bell Helicopter Textron Inc., Fort Worth, Texas, is being awarded a $418,851,869 modification to a previously awarded advance acquisition contract (N00019-12-C-0009) to provide additional funding for the procurement of long lead parts and components required for the manufacture of 15 Lot 10 UH-1Y and 10 Lot 10 AH-1Z helicopters for the Marine Corps.  Work will be performed in Fort Worth, Texas (60 percent) and Amarillo, Texas (40 percent) and is expected to be completed in March 2016.  Contract funds in the amount of $418,851,869 will be obligated at the time of award, none of which will expire at the end of the current fiscal year.  The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.