Cockpit upgrades on 30-year-old military jets are a gold mine

In February 1998, a Cessna 402 slammed into a hillside outside Cali, Colombia. Investigators found the altimeter had been misread. The pilot was experienced. The instruments were not lying, exactly. They were just old, round, and hard to parse in the dark. That crash was one of hundreds in the 1990s tied to what the aviation safety world calls "controlled flight into terrain" (the antiseptic way of saying a perfectly functional airplane was flown into something solid because the crew lost situational awareness).

The fix, everyone agreed, was glass cockpits. Replace the six-pack of analog gauges with flat panel displays. Give pilots synthetic vision that paints terrain on the screen before they can see it through the windshield. Layer in GPS approaches precise enough to land in fog. The commercial airlines did this aggressively from the late 1990s onward. Boeing's 777 and Airbus's A380 were born digital.

But here is the dirty secret of military and government aviation: thousands of aircraft flying today still rely on instruments that belong in a museum. The U.S. Air Force operates roughly 5,200 aircraft. The average airframe age across the fleet is 30 years. The C-130 Hercules, the workhorse tactical transport, has variants still flying with cockpit architectures designed in the 1960s. The KC-135 tanker fleet (average age: over 60 years) only recently began receiving digital upgrades. Many of these aircraft will fly for another two or three decades because replacement programs keep slipping right.

This creates an enormous, slow-burning market that sits in the boring middle ground between glamorous new platforms (B-21, NGAD) and front-page munitions orders. The Pentagon calls it "avionics modernization" and buries it deep in sustainment line items. It doesn't make cable news. It doesn't get tweeted by defence influencers. But it is one of the most reliable spending streams in the entire Department of Defense budget because the alternative is grounding aircraft that still have decades of structural life.

The commercial side has its own version of this problem. There are approximately 15,000 turboprop aircraft and 20,000 business jets in service globally. Many were certified in the 1980s and 1990s with analog avionics suites. Operators want (and increasingly, regulators require) modern GPS approaches, ADS-B Out transponders, synthetic vision, and digital autopilots. The big avionics houses (Honeywell, Collins Aerospace, Garmin) dominate the new-build market. But retrofitting old cockpits is a different game. It requires deep FAA certification expertise, the engineering chops to interface new digital systems with legacy airframes, and the patience to grind through supplemental type certificates one aircraft model at a time.

This is where the story gets interesting. Because the same skills that let a small company retrofit a King Air 350 with a glass cockpit also let it win contracts to modernize military platforms. The FAA and the DoD certification pathways are different in their specifics but identical in their logic: prove the new box talks correctly to the old airplane, prove it won't fail in ways the old box wouldn't, and do it without rewiring the entire aircraft. Companies that have built libraries of STCs (supplemental type certificates) across dozens of airframes hold a quiet but formidable competitive moat.

The current defence budget cycle is pouring fuel on this fire. The FY2026 defence budget request, submitted in March, includes over $18 billion for aircraft sustainment and modification. Europe's rearmament push is creating parallel demand, as NATO allies scramble to modernize aging fleets of Tornados, Tigers, and Lynx helicopters rather than wait a decade for new platforms. RTX's (NYSE:RTX) record $271 billion backlog and Teledyne Technologies' (NYSE:TDY) accelerating sensor business both reflect this macro trend. But the primes subcontract vast amounts of avionics retrofit work to specialists.

One company, founded in a Philadelphia suburb in 1988 by a group of engineers who had worked on military cockpit displays, has spent nearly four decades building exactly this kind of capability. It started by designing flat panel displays for aircraft that never had them. It moved into autothrottle systems, air data computers, and integrated flight management. It renamed itself last year to signal a broader ambition. Its market cap sits below $500 million. Its products fly in C-130s, King Airs, Gulfstreams, and Citation jets. And it just reported its strongest backlog in company history.