This is a Sources Sought notice for market research on the maintenance and overhaul of a Servocylinder Input/Output (NSN 1650-01-304-9016), a Critical Safety Item requiring overhaul by approved sources only. The estimated quantity ranges from a minimum of 20 to a maximum of 144 units, including 120 for the US and 24 for Foreign Military Sales. Performance is restricted to the Original Equipment Manufacturer, The Boeing Company (Ridley Park, PA), or other approved sources like AAR Allen Services, Inc. (Garden City, NY). No budget amount is specified, and the notice is for planning purposes only, not a solicitation. Responses are due by 30 April 2026.