62-4139

62-4139 is a Boeing RC-135, a four-engine jet. SkyMeter has tracked 114 flights totalling 433 hours of airtime via ADS-B across 14 callsigns. The most frequent segment is KOFF to KOFF. Service window in our records spans 408 days. Of those flights, 18 (15.8%) carry at least one detected incident: a go-around, unstable approach, stall warning, or runway excursion. The Boeing RC-135 has a maximum takeoff weight of 297,000 lb, heavy wake category.

About the Boeing RC-135

The Boeing RC-135 is the United States Air Force's premier signals intelligence and reconnaissance platform, a heavily modified derivative of the C-135 Stratolifter that has been gathering electronic intelligence since the early 1960s. Built on the same basic airframe as the Boeing 707 airliner, the RC-135 family includes specialized variants like the RC-135V/W Rivet Joint for signals intelligence, the RC-135U Combat Sent for technical intelligence, and the RC-135S Cobra Ball for ballistic missile monitoring. These aircraft bristle with antennas, radomes, and sensor arrays that make them instantly recognizable, and they carry mission crews of up to 30 specialists who operate the sophisticated electronic warfare and intelligence-gathering systems during flights that can exceed 12 hours with aerial refueling.

Powered by four CFM56 turbofans (re-engined from the original TF33s), the RC-135 operates at altitudes up to 50,000 feet and can loiter for extended periods near areas of interest, often along international borders or over international waters. The Rivet Joint variant, the most numerous in the fleet, has become indispensable for monitoring adversary communications and radar emissions, supporting combat operations from the Cold War through conflicts in Iraq, Afghanistan, and ongoing global intelligence missions. The aircraft's ability to geolocate signals, identify emitters, and provide real-time intelligence to commanders has made it a critical asset that operates around the clock from bases in the United Kingdom, Greece, Japan, and Nebraska.

Despite being based on 1950s-era airframe technology, continuous upgrades to mission systems, engines, and avionics have kept the RC-135 fleet operationally relevant into the 2020s. The Air Force maintains approximately 22 RC-135s across all variants, with no planned replacement on the horizon, a testament to the platform's enduring value and the difficulty of replicating its unique combination of range, endurance, crew capacity, and sensor integration in a newer airframe. SkyMeter has tracked flights across airframes and operators, covering distinct routes.