Sourcing obsolete electronic components is vital for the UK’s armed forces. Many frontline systems have been in service far longer than the production life of the components they depend on.

The RAF’s main frontline fighter, the Eurofighter Typhoon, entered operational service on 4 August 2003, meaning it has been in operational use for nearly 22 years. The Bowman C4I tactical voice and data communications system, used across all three services, was introduced in 2004. In that time, mobile phones and electronics have advanced dramatically, yet the Bowman system remains in operational use.

Some frontline equipment is even older:

  • The RAF recently retired the Puma helicopter, which had been in service since 1971, but continues to rely on the Chinook helicopter, introduced in 1980.
  • The Navy’s oldest active frontline vessel is the Hunt-class minesweeper HMS Ledbury, commissioned in June 1981.
  • The Army Air Corps retired its Gazelle helicopters in 2025, after more than 50 years of service since their introduction in 1971.

The US Air Force uses even older equipment.  The B-52 Stratofortress entered USAF service in 1955, and the oldest airframes still flying: are from the early 1960s.  And there are no plans to retire it. Instead, it’s expected service life is into the 2050s, giving it almost 100 years of service.

Another very old USAF aircraft is the KC-135 Stratotanker, the main air-to-air refueling tanker. It was  introduced in 1957, and some flying airframes are over 60 years old.

Keeping these system mission-critical systems operational requires a reliable supply chain for obsolete electronic parts. The aircraft have been continually upgraded with new avionics and radar, but their service life is so long that the components in the upgrades become obsolete.