Air India will launch mandatory substance screening for all pilots starting Thursday, expanding testing beyond regulatory requirements following an August 4 incident where a Phuket-Delhi flight captain tested positive for marijuana. The initiative covers main airline pilots and budget subsidiary Air India Express crew.
The Catalyst: Flight AI2379 and the Altitude Drop
The operational shift at India’s flag carrier stems directly from an unnerving occurrence earlier this month. On August 4, Air India flight AI2379, an Airbus A320neo flying from Phuket to New Delhi, suddenly lost approximately 300 feet of altitude during cruise flight. According to reports confirmed by Reuters, the mid-air drop injured 20 passengers and 4 crew members.
Initial attention focused heavily on meteorological factors and severe turbulence. But subsequent investigations by the Directorate General of Civil Aviation (DGCA) and the Aircraft Accident Investigation Bureau (AAIB) uncovered a more alarming human factor. A confirmatory drug test revealed that the flight’s captain tested positive for marijuana.
According to Livemint, a purported post-flight maintenance report for the aircraft—registration VT-EXO—flagged multiple technical warnings. These included repeated low-pressure alerts across green, blue, and yellow hydraulic systems, low fluid levels, two instances of autopilot disconnection, and faults involving elevator flight controls. Investigators are working to determine whether these mechanical warnings intersected with crew performance during the sudden descent.
Expanding Beyond Regulatory Baselines
Existing regulations in India, overseen by the DGCA, require airlines to randomly test at least 10 per cent of their flight crew for psychoactive substances each year. These baselines mirror standards practiced in other major aviation jurisdictions like the United States and Europe.
But leadership at the airline determined those standard thresholds are no longer sufficient. In an internal memo to employees, the carrier announced an aggressive deviation from the norm.
“We nevertheless now feel that it is important to go further,” Air India stated in the memo, emphasizing that the initiative is intended to uphold stringent safety standards and provide reassurance to passengers and stakeholders.

Beginning Thursday, comprehensive screening for substances and medications prohibited under prevailing aviation rules will take place across multiple operational touchpoints. Testing will occur alongside training sessions at the airline’s Gurugram academy, after flights at briefing centers and offices, or at designated pilot home bases. Pilots employed by budget subsidiary Air India Express will also undergo the mandatory screenings.
| Parameter | Previous Standard | New Policy |
|---|---|---|
| Testing Scope | Random testing of at least 10 per cent of flight crew annually | Mandatory screening for all pilots |
| Target Workforce | Mainline Air India pilots | Mainline Air India and Air India Express pilots |
| Screening Venues | Designated medical and regulatory checkpoints | Gurugram Academy training, flight briefing centers, and base offices |
| Trigger Event | Routine annual compliance | August 4 Phuket-Delhi flight altitude loss and positive marijuana test |
Transnational Ripples and Macroeconomic Strakes
As external agencies—including the French safety investigation agency BEA and aircraft manufacturer Airbus—assist local authorities in probing the Phuket-Delhi incident, the spotlight remains fixed on cockpit protocols.
But there is a catch.