An Air India Airbus A320 suffered a critical loss of hydraulic pressure on August 4 that left pilots unable to control essential flight surfaces for approximately four seconds, causing the aircraft to descend roughly 90 metres and injure 24 people on board, according to findings from Airbus reviewed by Reuters. The incident occurred aboard flight AI2379 en route from Phuket to Delhi, which managed to land safely despite the harrowing loss of altitude and temporary incapacity of vital aircraft systems.
Airbus' preliminary technical assessment indicates the aircraft experienced simultaneous failures across all three independent hydraulic systems in rapid succession. These systems rely on pressurised fluid to operate flight-critical components, making redundancy essential to aviation safety. The timing of these failures—occurring nearly instantaneously rather than sequentially—points to a common cause that experts are still working to identify, raising important questions about whether a shared vulnerability might affect other aircraft in Air India's fleet or the broader A320 family.
During the four-second period when hydraulic pressure was lost, the pilots found themselves unable to manoeuvre the elevators and ailerons—the movable surfaces on the tail and wings responsible for controlling pitch (nose up or down) and roll (banking left or right). As the aircraft began to pitch upward uncontrollably, the first officer applied full nose-down input to attempt recovery, but the flight-control surfaces did not respond. This scenario represents one of aviation's most dangerous situations: a crew unable to command the aircraft during an emergency. Within seconds, the hydraulic systems spontaneously recovered, allowing normal flight operations to resume and the crew to land the aircraft safely.
Airbus has initiated an extensive investigation to determine what triggered the triple hydraulic failure. The manufacturer has requested that Air India conduct comprehensive testing on the aircraft's hydraulic systems, pressure sensors, and monitoring switches. The airline has also been asked to remove certain sensors for laboratory inspection and to examine the aircraft's wiring for potential faults or degradation that could have caused the simultaneous pressure loss. These diagnostic steps are critical for understanding whether the problem originated within the hydraulic components themselves or in the detection and control systems that monitor them.
Beyond the immediate cause of the hydraulic failure, Airbus identified secondary concerns stemming from the abrupt altitude change. The aircraft experienced forces during the sudden descent that exceeded the aircraft's design specifications, potentially stressing the airframe beyond intended parameters. This finding necessitates a detailed structural inspection to identify any cracks, deformations, or material weakening that may have resulted from the extreme manoeuvre, a process that could ground the aircraft for weeks or longer depending on findings.
The investigation has expanded to include a review of the aircraft's maintenance history. Airbus has specifically requested documentation of all hydraulic system maintenance performed in the month preceding the incident, as improper servicing, contamination during maintenance, or installation errors could provide clues to the failure. The manufacturer also seeks more detailed technical debriefs from the pilots, hoping their minute-by-minute recollection of instrument readings and system behaviour might illuminate the sequence of events leading to the crisis.
Initially, Air India characterised the incident as weather-related turbulence, but the airline subsequently revised its public description to acknowledge a sudden loss of altitude without attributing it to atmospheric conditions. This shift in terminology reflects a growing understanding that the incident resulted from aircraft systems failure rather than external meteorological factors. India's Aircraft Accident Investigation Bureau has classified the event as a serious incident and is conducting its own independent investigation with technical support from Airbus and France's Bureau of Enquiry and Analysis for Civil Aviation Safety.
A complicating factor emerged when the flight captain tested positive for cannabis in a confirmatory drug test, though investigators have established no causal link between this finding and the technical failure. Nevertheless, Air India responded by implementing mandatory substance testing for all pilots beginning August 13, an action that reflects heightened regulatory pressure and the airline's determination to ensure compliance with international safety standards. This move signals the carrier's recognition that maintaining rigorous operational discipline is critical at a time when safety scrutiny is intensifying.
The incident places additional strain on Air India at a particularly vulnerable moment in the airline's corporate evolution. Former Ethiopian Airlines chief executive Tewolde Gebremariam is preparing to assume leadership of the Tata Group-controlled carrier, which faces mounting financial losses and deepening regulatory oversight. The timing compounds existing challenges, as the airline is still processing the aftermath of the June 2025 crash of one of its Boeing 787s near Ahmedabad, a catastrophe that claimed 260 lives and triggered widespread questions about the airline's safety culture and maintenance protocols. Restoring public confidence and regulatory trust while confronting a fresh technical crisis requires decisive action and transparent communication.
For Air India's stakeholders, including Singapore Airlines which holds approximately 25 per cent equity in the carrier, these accumulating safety and operational challenges create genuine concern about the airline's trajectory. The convergence of technical incidents, regulatory scrutiny, financial pressures, and leadership transition suggests that Air India's turnaround programme will require sustained commitment and substantial investment in systems, training, and cultural change. The coming weeks will reveal whether the Airbus investigation identifies a straightforward technical fix or uncovers systemic vulnerabilities requiring more comprehensive remediation across the fleet.
