What happened
On 15 June 2020, an F-15C, tail number 86-0176, belonging to the 493rd Fighter Squadron based at RAF Lakenheath, crashed into the North Sea approximately 124 nautical miles northeast of its home base. The aircraft was engaged in a local combat training flight under Instrument Meteorological Conditions (IMC).
During an air-to-air engagement, the pilot was executing maneuvers to intercept an adversary aircraft. After successfully simulating a missile kill, the pilot transitioned into a descending left turn toward the south. During this maneuver, the aircraft's pitch attitude dropped significantly while passing through cloud layers. The aircraft accelerated to high speeds and began a rapid descent, breaching the established training floor of 4,000ft. At approximately 1,000ft, the pilot attempted a high-G recovery maneuver, pulling 8.2 Gs in an effort to climb above the water. However, the F-15C impacted the sea at high velocity. The pilot was fatally injured, and the aircraft was destroyed.
The investigation
The Accident Investigation Board examined flight data, witness testimony, and technical reports to determine the sequence of events. Investigators analyzed onboard recorders, including pitch, bank angle, and airspeed, alongside audio recordings of the mission. The board also reviewed maintenance records and weather data for the period of the accident.
Technical analysis of the aircraft's performance confirmed that the pilot was providing deliberate control inputs throughout the maneuver. The investigation found no evidence of mechanical failure or cockpit instrumentation malfunctions. Furthermore, data indicated the pilot remained conscious and attempted a recovery until the moment of impact.