An Air India Airbus A320 experienced a terrifying moment mid-flight on August 4 when the aircraft lost hydraulic pressure across all three systems in rapid succession, rendering critical flight controls inoperative for approximately four seconds. Flight AI2379, travelling from Phuket to Delhi, descended some 90 metres during the incident, which left 24 people aboard injured. Despite the alarming loss of control, the aircraft ultimately landed safely in the Indian capital, though the episode has triggered serious questions about the carrier's operational safety and maintenance protocols.
According to a preliminary technical assessment by Airbus reviewed by Reuters, the sudden hydraulic failure temporarily disabled the elevators and ailerons—essential movable surfaces on the aircraft's wings and tail that determine pitch and roll. During the critical four-second window when these controls were unresponsive, the first officer executed a full nose-down input in an attempt to regain command of the aircraft, but the flight-control surfaces initially showed no response. The aircraft pitched sharply upward at that moment, creating the dangerous altitude loss and the physical forces that injured passengers and crew members.
What makes this incident particularly concerning for aviation safety experts is that the loss of hydraulic pressure affected all three independent systems almost simultaneously—a scenario that conventional design principles suggest should never happen. Modern aircraft incorporate multiple redundant hydraulic systems precisely to prevent such cascading failures. The fact that this safeguard failed suggests either an unprecedented mechanical event or a systemic issue with how the systems are interconnected or monitored. Airbus has initiated a comprehensive investigation to determine the root cause, though its preliminary analysis has not yet identified what triggered the initial pressure loss.
The plane manufacturer has requested that Air India conduct extensive testing on the hydraulic systems themselves, as well as the pressure sensors and switches designed to detect anomalies. Airbus has also asked the airline to remove certain sensors for detailed laboratory inspection and has indicated that further investigation of the aircraft's wiring may be necessary. These requests underscore the technical complexity of diagnosing hydraulic failures and the need for meticulous examination of every component that could have contributed to the cascade of failures.
Beyond the hydraulic systems, Airbus has flagged that the aircraft experienced structural forces exceeding specified design limits during the sudden altitude change. This discovery has prompted an additional inspection mandate to check for possible structural damage to the airframe itself. Such damage might not be immediately visible but could compromise the aircraft's integrity during future flights, making thorough structural examination essential before the plane returns to service.
Air India has been asked to provide detailed maintenance records for the aircraft's hydraulic systems over the preceding month, as well as more comprehensive accounts from the flight crew about what they experienced and observed during the incident. This information will help investigators establish whether recent maintenance work, environmental factors, or crew actions may have contributed to the emergency.
The investigation has been complicated by conflicting initial narratives. Air India's first public statement characterised the event as turbulence-related, but this description was dropped in subsequent communications, with the airline instead referring simply to a sudden loss of altitude. India's Aircraft Accident Investigation Bureau has classified the occurrence as a serious incident and is conducting a formal investigation with technical support from both Airbus and France's BEA (Bureau of Enquiry and Analysis for Civil Aviation Safety).
Another complication emerged when it was revealed that the flight's captain tested positive for marijuana in a confirmatory drug test, according to sources familiar with the matter. While no causal link has been established between this result and the altitude loss, the disclosure has added a layer of scrutiny to Air India's safety culture. In response, the airline initiated mandatory substance testing for all pilots beginning August 13, signalling an attempt to strengthen its safety protocols and address regulatory concerns.
For Air India, this incident comes at a particularly vulnerable moment. The carrier, which is controlled by the Tata Group and has Singapore Airlines as a roughly 25 per cent shareholder, is navigating significant operational challenges under the incoming leadership of Tewolde Gebremariam, the former chief executive of Ethiopian Airlines. The airline has been attempting a turnaround amid mounting financial losses and intensified scrutiny from safety and regulatory authorities.
The timing is especially problematic given that Air India suffered a catastrophic Boeing 787 crash in Ahmedabad in June 2025, which killed all 260 people aboard. That disaster prompted a comprehensive review of the carrier's safety practices and resulted in heightened regulatory oversight. The August A320 incident, even though it was contained and resulted in no fatalities, further damages Air India's safety reputation and raises questions about whether systemic issues extend across its fleet operations.
The convergence of technical failure, crew-related concerns, and institutional challenges confronting Air India reflects broader tensions within India's aviation sector. As one of Asia's fastest-growing airline markets, Indian carriers operate in a highly competitive environment where cost pressures can sometimes conflict with maintenance and safety priorities. The incidents involving Air India suggest the need for renewed emphasis on rigorous maintenance standards, robust crew protocols, and transparent safety reporting across Indian aviation.
For regional aviation authorities and competing carriers throughout Southeast Asia, the Air India incidents underscore the importance of maintaining uncompromising safety standards and rapidly addressing emerging issues before they escalate. The investigation into the A320 incident will likely produce valuable lessons for the entire industry about hydraulic system redundancy, sensor reliability, and emergency response procedures.
