Overview
- Flight BA919 from Düsseldorf to Heathrow experienced repeated stall warnings on July 6 while over east London and the crew first declared PAN PAN before upgrading to MAYDAY and performing a go‑around.
- Authorities say an Air Data Reference (ADR) system failed, producing conflicting airspeed/angle‑of‑attack inputs and causing the flight computers to revert from Normal Law to Alternate Law where some automatic protections are lost.
- Preliminary reports and flight data indicate a second stall warning at about 3,000 ft led to an abrupt recovery manoeuvre that briefly descended the aircraft to roughly 2,200 ft before the crew stabilised and landed safely with no injuries.
- British media have reported that the captain physically intervened to take control from the first officer and that the captain is on stress leave, but those details come from unnamed sources and have not been confirmed by investigators.
- The AAIB has formally classified the event as a LOC‑I serious incident and opened a correspondence investigation that will review flight recorder data, maintenance records and crew actions; investigators will determine why the ADR failed and whether procedure or training changes are needed.