NAVAIR PMA-261 is conducting a sources-sought market survey for a follow-on IDIQ requirement to provide CH-53E/K Depot Level Aircraft Modification installation and material support, including recurring, non-recurring, and prototype modifications, A-Kit production/delivery, and organizational maintenance/supply support. Work will be performed at Government-owned CONUS and OCONUS locations, primarily MCAS Miramar and MCAS New River, with an anticipated period of performance from FY27 through FY32. The anticipated contract is a stand-alone IDIQ using Cost-Plus Fixed Fee, Cost Reimbursement, and Firm-Fixed pricing, and prospective offerors must be able to stand up aircraft modification capability within 30 days after contract award. Interested businesses should demonstrate experience with rotary-wing depot-level modifications, COMNAVAIRFORINST 4790.2 maintenance, concurrent C/MH-53E or similar airframe work, A-Kit production, technical-data access, and industry certifications; the applicable NAICS is 336411 with a 1,500-employee small-business size standard. This is a follow-on requirement currently held by Adams Communication & Engineering Technology Inc., and the notice is for informational market research only, not a request for proposal.