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The Aircraft Accident Investigation Bureau (AAIB) has released its preliminary findings into the serious incident involving Air India flight AI 2379, which was operating from Phuket to Delhi on August 4, 2026.
According to the official preliminary findings, the Airbus A320 experienced a sudden altitude variation of around 300 feet while cruising. The aircraft later stabilised and landed safely in Delhi.
What Happened to Air India Flight AI 2379?
The flight experienced a serious in-flight upset during cruise after the aircraft’s systems recorded a temporary loss of pressure involving all three hydraulic systems.
During the sequence of events, the autopilot disconnected and warnings were triggered. The aircraft experienced a sudden altitude variation before the hydraulic systems recovered and the flight stabilised.
The aircraft was carrying 137 passengers, including three infants, along with eight crew members. A total of 20 passengers and four cabin crew members were reported injured.
Despite the seriousness of the incident, the aircraft landed safely in Delhi.
What Did the AAIB Report Reveal?
The AAIB’s preliminary report highlighted the temporary loss of pressure affecting all three hydraulic systems as one of the key technical developments during the incident.
However, the exact cause of the hydraulic pressure loss has not yet been determined.
The investigation remains ongoing, and the preliminary report should not be considered the final conclusion regarding what caused the Air India Phuket-Delhi flight incident.
Further technical analysis is expected as part of the AAIB’s investigation.
Pilot Substance Test Finding
The preliminary report also recorded the results of psychoactive substance detection tests conducted on the flight crew.
According to the AAIB findings, the Pilot-in-Command returned a non-negative result, including during subsequent confirmatory testing. The co-pilot’s test results were negative.
However, the preliminary report does not establish that the pilot’s test result caused the hydraulic system event or the sudden altitude variation.
The technical cause of the incident is still under investigation.
Air India Phuket-Delhi Incident: Key Facts
- Flight: Air India AI 2379
- Route: Phuket to Delhi
- Date: August 4, 2026
- Aircraft: Airbus A320
- Altitude variation: Around 300 feet
- Injuries: 20 passengers and four cabin crew members
- Major technical finding: Temporary loss of pressure in all three hydraulic systems
- Final outcome: Aircraft stabilised and landed safely in Delhi
- Investigation: Still ongoing
Bottom Line
The AAIB preliminary report confirms that Air India flight AI 2379 experienced a serious technical event involving a sudden altitude variation, autopilot disconnection and temporary hydraulic pressure loss.
While the report has revealed important facts about the incident, the final cause has not yet been determined.
The AAIB investigation is continuing, and further findings are expected in the final report.
This story will be updated if the AAIB releases further official information about the Air India Phuket-Delhi flight incident.
