According to GSA guidelines, contractors must demonstrate meaningful subcontracting to small businesses on major sustainment awards; Boeing’s $900M T‑38C avionics sustainment performance creates a multi-year pipeline of parts repair, LRU (line-replaceable unit) maintenance, software sustainment, obsolescence management, test-equipment calibration and field-service support. This paragraph maps the prime-sub relationship: Boeing is the prime systems integrator for avionics sustainment while military depots, regional maintenance sites and government logistics managers will direct throughput and priorities. The award spans hardware refresh, COTS-to-GOTS migration for legacy boards, depot-level repair instructions, spares provisioning, and recurring technician training. GSA, SBA and Air Force acquisition offices will watch subcontracting goal execution; primes often set tiered goals for small business socioeconomic categories such as 8(a), HUBZone, SDVOSB and WOSB. For suppliers, immediate actions include capability gap analysis, SAM.gov registration, CAGE code validation, and PDM/test-equipment read-across to Boeing’s statement of work. With the Air Force’s sustainment focus, small avionics shops and certified repair depots can expect statements of work with fixed-price repair orders, time-and-materials field support, and IDIQ task orders linked to the $900M ceiling.