India, Sept. 4 -- An Air India Airbus A320 carrying 145 people suffered the near-simultaneous loss of all three hydraulic systems while cruising at 36,000 feet on a Phuket-Delhi flight on August 4, triggering an autopilot disconnect, a brief stall warning and an altitude upset that injured 24 people, according to a preliminary report by the Aircraft Accident Investigation Bureau (AAIB).

The aircraft, operating as flight AI 2379, recovered its hydraulic systems within seconds and continued to Delhi, where it landed safely. The AAIB said its investigation into the technical and other aspects of the incident was still underway.

The report did not establish any link between the hydraulic failure or altitude upset and the pilot-in-command te...