An Air India Airbus A320 suffered a harrowing loss of hydraulic pressure on August 4 while en route from Phuket to Delhi, forcing the aircraft to plummet approximately 90 metres and leaving 24 people aboard injured. According to a preliminary analysis by Airbus reviewed by Reuters, the incident exposed a serious vulnerability in the aircraft's flight control systems, though the plane ultimately landed safely at its destination despite the altitude loss. The event has intensified scrutiny of India's carrier at a particularly turbulent time for the airline's leadership and operational standing.
The Airbus assessment paints a concerning picture of the malfunction. All three independent hydraulic systems—which serve as the essential power supply for flight controls and other critical aircraft systems—experienced simultaneous pressure losses in rapid succession. This catastrophic degradation left pilots without the ability to operate the elevators and ailerons for approximately four seconds, those crucial movable surfaces on the wings and tail that determine whether an aircraft climbs or descends and which direction it banks. During those terrifying moments, the aircraft pitched sharply upward. The first officer immediately responded by pulling back on the control stick with full nose-down authority, yet the flight-control surfaces registered no direct response from his input, a scenario that would test any pilot's composure.
The recovery was as swift as the emergency itself proved alarming. Within seconds, all three hydraulic systems regained pressure and function, restoring the pilots' ability to command the aircraft. This rapid restoration of control prevented what could have evolved into a catastrophic loss-of-control scenario. Nevertheless, the sudden altitude loss subjected the airframe to forces that exceeded the aircraft's design specifications, prompting Airbus to request a comprehensive structural inspection to identify any damage caused by the abrupt pitch movement. The plane maker's concern reflects the physical stress that such unusual manoeuvres impose on an aircraft's integrity.
The root cause of the hydraulic failure remains unidentified at this stage. Airbus has tasked Air India with an extensive diagnostic programme designed to isolate the problem. The airline must conduct rigorous testing of the hydraulic systems themselves, along with meticulous examination of the pressure sensors and switches that monitor system integrity. The manufacturer has also instructed Air India to remove specific sensors for laboratory analysis and suggested that more detailed wiring inspections may prove necessary. Additionally, Airbus requested detailed records of all hydraulic system maintenance performed within the preceding month, along with comprehensive accounts from both pilots about their actions and observations during the emergency.
Air India initially characterised the incident as turbulence-related in its public communications, a description that appears increasingly difficult to reconcile with the technical findings. The airline later withdrew this characterisation, settling instead on the more clinically accurate description of a sudden loss of altitude. This shift in narrative may reflect either an attempt to align statements with emerging technical data or a recognition that the simplistic turbulence explanation could not withstand scrutiny. Indian aviation authorities have not been swayed by either formulation, classifying the event as a serious incident worthy of formal investigation.
The Aircraft Accident Investigation Bureau of India has assumed responsibility for the formal investigation, supported by technical expertise from Airbus and France's Bureau of Enquiry and Analysis for Civil Aviation Safety. This international collaborative approach reflects the complexity of the incident and the need for comprehensive expertise in hydraulic systems analysis. The involvement of French authorities underscores the transnational nature of modern aviation oversight, with regulatory agencies and manufacturers worldwide focused on understanding what went wrong aboard flight AI2379.
Complications emerged when the captain tested positive for marijuana in a confirmatory drug test, according to sources familiar with the investigation. Air India responded swiftly to the disclosure by instituting mandatory substance testing for all pilots beginning August 13, an internal memo reveals. However, authorities have established no causal link between the captain's test result and the hydraulic malfunction, suggesting the two matters remain separate issues within a broader pattern of regulatory and safety concerns.
The timing of this incident could not be more fraught for Air India, which is undergoing a critical leadership transition. Tewolde Gebremariam, the accomplished former chief executive of Ethiopian Airlines, is preparing to assume the helm at the Tata Group-controlled carrier. Air India desperately needs stability and demonstrated operational excellence as it attempts to reverse mounting financial losses and restore confidence in its safety protocols. Instead, the airline faces intensifying scrutiny from regulators and the travelling public at a moment when new leadership was meant to signal fresh momentum.
The broader context compounds the urgency of resolving these safety questions. In June 2025, an Air India Boeing 787 crashed during approach to Ahmedabad, India, killing all 260 people aboard in what became one of aviation's deadliest recent accidents. That catastrophe triggered investigations and regulatory reviews that continue to reverberate through the airline's operations. The August 4 A320 incident, while less severe in outcome, arrives amid heightened sensitivity about Air India's safety culture and maintenance practices. Investigators will inevitably examine whether any systemic issues connect the two events, or whether the hydraulic failure represents an isolated technical anomaly.
Singapore Airlines, which holds approximately 25 per cent of Air India's equity, also faces indirect exposure to these reputational and operational risks. The carrier's substantial stake means that Air India's safety record, financial performance, and regulatory standing directly influence Singapore Airlines' investment value and brand reputation through association. Any findings that suggest inadequate maintenance protocols or systemic safety deficiencies could prompt additional scrutiny of Air India's operations and raise questions about governance and oversight at the Tata Group level.
The hydraulic systems failure revealed in this incident touches on fundamental questions about redundancy and safety margins in modern commercial aviation. The fact that all three independent hydraulic systems experienced pressure loss simultaneously—rather than one system failing while others provided backup—suggests either a common underlying cause affecting multiple systems or an extraordinary coincidence that investigators must rule out. Whether the problem stems from contaminated hydraulic fluid, manufacturing defects, sensor malfunctions, or maintenance oversights will determine not only what remedial actions Air India must take but also what implications might apply to other A320 operators worldwide.
