What Does the Contract Modification Cover? The Department of War said Tuesday the modification expands an undefinitized cost-plus-fixed-fee contract, adding non-recurring engineering work to reconfigure the P-8A Poseidon aircraft for the customer’s specific operational needs. The latest modification builds on Boeing’s continuing P-8A work for U.S. and international customers. Earlier, Boeing secured a $166.8 million Navy contract in March 2026 to provide software sustainment and modernization support for the P-8A Poseidon fleet. In November 2024, the Navy awarded Boeing a $1.68 billion contract modification to produce seven Lot 13 P-8A aircraft and provide non-recurring engineering support for Canada and Germany.