Amendment 0004: The purpose of this amendment is to correct administrative discrepancies identified in Section I of the solicitation and to provide the Government's official response to three industry questions. Accordingly, the solicitation is hereby amended as follows: 1. Correction of Section I Clauses: a. Deletion of Requirements Clause: FAR Clause 52.216-21, Requirements, is deleted in its entirety. b. Update to Ordering Clause (52.216-18): Paragraph (a) is revised to correct the ordering period to read: "from 1 January 2027 through 31 December 2031." c. Update FAR Clause 52.216-22. Paragraph (d) of this clause is updated to 60 months (5 years) after the end of the ordering period, allowing for the full performance of late-issued task orders. d. Update to Option to Extend Services Clause (52.217-8): The notification period for exercising the option is corrected to read "prior to the expiration of the contract." 2.Correction of Attachment P2 Instructions: A revised 'Attachment P2 - Fully Burdened Labor Rates is hereby provided. The Instructions tab has been corrected to remove an erroneous reference to NAVAIR Clause CTXT.232-9529. 3. Responses to Industry Questions: The Government's official responses to three (3) questions are provided in the Solicitation N0042126R1009 -Amendment 0004. All other terms and conditions, including the proposal due date of July 6, 2026, remain unchanged. Amendment 0003: The purpose of this amendment is to provide a revised labor hour distribution table to clarify Government versus Contractor site, and to reiterate the Question and Answer deadline. Section L, Table 4 (Government Estimated Labor Hours): A revised 'Attachment 05 - Sections L and M (Revised for Amend 0002)' is hereby provided. This revision incorporates an updated Table 4, The final deadline for receipt of all industry questions remains 2:00 PM Eastern Time on June 18, 2026. No additional questions will be accepted or reviewed after this date and time. The proposal due date and time remain unchanged as July 6, 2026, at 2:00 PM Eastern Time. Except as provided herein, all other terms and conditions of the solicitation remain unchanged and in full force and effect. Amendment 0002 purpose: 1. Provide a Revised Labor Hour Pricing Table: A revised "Attachment 05 - Sections L&M" is hereby provided to incorporate a new Table 4, which formally breaks down the estimated labor hours into the 80% Contractor-site and 20% Government-site split. Offerors MUST use this revised table as the common basis for all cost proposal preparation. 2. Final Q&A Responses: This amendment provides the Government's official response to one final administrative question received from industry. 3. Q&A Period is Closed: The deadline for receipt of all industry questions was 2:00 PM Eastern Time on June 18, 2026. The Q&A period is now officially closed. The Government will not be accepting additional questions. All other terms and conditions, including the proposal due date o…