This document appears to be Amendment 0004 to a solicitation for Aviation Maintenance and Support Services (AMSS) for the Federal Bureau of Investigation (FBI). The solicitation, number 15F06724R0000230, is seeking a contractor to provide full scope fixed and rotary wing aviation support, including aircraft maintenance and support personnel for field-level maintenance and backshop support functions, to meet the FBI's mission requirements as outlined in the Performance Work Statement (PWS). The solicitation is being issued by the FBI's Headquarters Division. No additional details are provided about pricing terms, set asides, incumbents, or award dates, as this appears to be an amendment document without that information.