The investigation into the Air India Phuket-New Delhi flight incident has taken a new turn after the pilot-in-command underwent further testing following an initial post-flight screening for psychoactive substances.
The development relates to Air India flight AI2379, an Airbus A320 operating from Phuket to New Delhi on August 4. The aircraft experienced a sudden loss of approximately 300 feet in altitude during cruise, after which it stabilised and continued its journey to Delhi.
Editorial Insight
Key Highlights
Important points readers should notice.
Air India flight AI2379 was operating from Phuket to New Delhi. The incident occurred on August 4, 2026.
The aircraft experienced a sudden loss of approximately 300 feet of altitude. The aircraft later stabilised and landed safely in Delhi.
Passengers and crew members were injured during the incident. The pilot-in-command underwent a post-flight screening for psychoactive substances.
The initial screening result was described by the government as not negative. The sample has been sent for confirmatory testing.
Air India said it has not received the test results. The aviation incident remains under investigation.
The aircraft landed safely in New Delhi, but several passengers and crew members were injured during the sudden altitude change and turbulence. The incident has been classified as a serious aviation occurrence and is under investigation.
The latest development concerns the mandatory post-flight screening of the pilots. India's civil aviation authorities said the initial screening of the pilot-in-command produced a result that was not negative, prompting the sample to be sent for confirmatory laboratory testing.The final result has not yet been released.
Air India has also said that the test results have not been shared with the airline and that it is therefore not in a position to comment on any findings. The airline further stated that crew members undergo drug screening in accordance with applicable aviation regulations.
Editorial Analysis
Why This Matters
The incident has renewed attention on pilot fitness, drug-screening procedures and aviation safety oversight. Commercial aviation relies on strict medical and operational standards for flight crew. A confirmed violation of those standards could have serious regulatory implications. However, the current case remains under investigation. The initial screening result is not a final finding, and no conclusion should be drawn until confirmatory testing and the wider aviation investigation are completed. The case also highlights the importance of separating two questions: what caused the sudden altitude loss, and what the final drug-screening result shows. Authorities have not established that the two are connected.
The distinction between an initial screening result and a confirmed laboratory result is significant. A preliminary screening requiring further testing does not by itself establish that the pilot consumed a prohibited substance or that it caused the in-flight incident.
The Aircraft Accident Investigation Bureau (AAIB) and aviation authorities are examining the circumstances surrounding the sudden altitude loss separately from the drug-screening process.
What Happened During the Flight?
Air India flight AI2379 was travelling from Phuket to Delhi when it experienced a sudden altitude loss during the cruise phase. According to reporting on the incident, the aircraft dropped approximately 300 feet before stabilising. The flight continued to Delhi and landed safely. The sudden movement caused injuries among passengers and crew members, leading to medical evaluation after arrival. Reuters previously reported that eight passengers and four crew members were taken to hospital for medical evaluation.The incident subsequently came under investigation by Indian aviation authorities.
The Drug Screening
Following the flight, the pilots underwent post-flight screening for psychoactive substances as part of aviation safety procedures.
The Ministry of Civil Aviation said the pilot-in-command's initial screening result was not negative and therefore required a confirmatory test. The sample has been sent for further laboratory analysis.
This means the initial screening should not be treated as a confirmed positive result. Confirmatory testing is required to determine whether the preliminary result is valid.The final report is therefore expected to be important in determining what regulatory or administrative action, if any, may follow.
Air India’s Response
Air India has said it is aware that a post-flight screening was conducted on the pilots in accordance with applicable procedures. The airline said the results had not been shared with it and that it was therefore not in a position to comment on any findings. Air India also said it regularly conducts drug testing of its crew members in accordance with civil aviation regulations.
Aviation Investigation
The sudden altitude loss is being examined by aviation authorities as a separate safety matter. The Aircraft Accident Investigation Bureau is investigating the incident, while the Directorate General of Civil Aviation is also examining the circumstances surrounding the flight. At this stage, there is no verified finding establishing that the pilot's preliminary screening result was responsible for the aircraft's altitude loss. The final investigation and confirmatory laboratory testing will be important in determining the next steps.
