The pilot-in-command of an Air India flight from Phuket to Delhi tested positive for a psychoactive substance after the aircraft encountered a significant in-flight incident, leading to passenger injuries and cabin damage, according to a preliminary report by India's Aircraft Accident Investigation Bureau (AAIB).

The incident, which occurred on August 4, saw the Delhi-Phuket flight experience multiple hydraulic failures and a sudden loss of altitude. The aircraft briefly dropped approximately 300 feet while flying over Odisha, during which all hydraulic systems failed and the autopilot disengaged.

Twenty-four passengers sustained injuries as a result of the altitude disturbance. The aircraft's cabin also suffered considerable damage, including cracked ceilings and an uprooted commode. Despite the challenges, the crew decided to continue the flight to Delhi.

Following the event, the pilot-in-command underwent a post-flight screening in Delhi, where an initial test for psychoactive substances returned a "non-negative" result. A subsequent confirmatory test, conducted later, also turned out to be positive for the substance.

The AAIB released its preliminary report on Friday, confirming the use of drugs by the pilot and labeling it a "serious concern." The bureau has urged the Directorate General of Civil Aviation (DGCA) to take appropriate action regarding the matter. The AAIB continues to diligently examine all aspects of this alarming event.

In response to the developments, Air India has reiterated its commitment to safety, stating that it remains the airline's highest priority.