This is a follow-up Sources Sought notice for the F-15SA Programmed Depot Maintenance (PDM) program, intended for market research only and not a request for proposal. Potential contractors must identify existing facilities where they would perform the work, as the UIL inspection is critical for flight safety. The entire program covers a total of 145 F-15SA aircraft, with the first 4 jets inducted under the basic contract for validation and verification. Industry is asked to review the attached Performance Work Statement, Work Specification, and Government Furnished Equipment list, and provide feedback along with a Rough Order of Magnitude price estimate. No specific budget amounts, submission timelines, or performance location are mentioned in this notice.