An Air India flight operating between Phuket and Delhi reportedly experienced a significant altitude loss event linked to a failure across all three hydraulic systems, according to an exclusive report from The New Indian Express. While the full details of the incident—including the specific aircraft type, flight number, altitude lost, and how the crew ultimately regained control—were not available in the source material reviewed, the headline alone signals a serious airworthiness event. Modern transport-category aircraft, including the widebody types Air India operates on international routes such as this one, are designed with triple-redundant hydraulic architecture specifically to prevent the kind of total loss of control authority that a simultaneous or cascading failure of all three systems could cause. A confirmed triple hydraulic failure, rather than a single-system fault, would represent an extraordinarily rare and serious technical anomaly worth close scrutiny by both the airline and regulators.
For working pilots, hydraulic system redundancy is a foundational assumption baked into type training, QRH procedures, and CRM doctrine. Most widebody aircraft (Boeing 777s, 787s, and Airbus A330/A350 types alike) are certified on the premise that no single point of failure—and often no dual failure—should result in loss of primary flight control surfaces. Incidents involving multiple hydraulic system degradation, such as United 232 in 1989 (a DC-10 that lost all three hydraulic systems after an uncontained engine failure), remain touchstone case studies precisely because they are so rare and because crews in those scenarios are forced into degraded or manual reversion control laws, relying on differential thrust, trim, and any residual actuator authority to maintain controlled flight. If the Phuket-Delhi flight did experience a comparable failure mode, however transient or partial, it would be a notable data point for training departments and safety offices to study, particularly regarding crew response, altitude deviation magnitude, and recovery technique.
This report also underscores the value of aggressive, transparent post-incident data disclosure. Triple hydraulic failures do not typically occur spontaneously; they are usually traceable to a common-cause event such as an uncontained engine failure, a structural fluid line breach, a maintenance error affecting multiple systems, or a shared reservoir/pump fault. Investigators and airline engineering teams will need to determine whether this was a genuine simultaneous triple failure or a sequential/cascading degradation, and whether any commonality in routing, plumbing, or maintenance history contributed. For Air India specifically, this incident arrives amid heightened scrutiny of the carrier's operational and maintenance practices following other recent high-profile safety events, making transparent investigation and public reporting particularly consequential for passenger and regulatory confidence.
More broadly, this incident reinforces why redundancy engineering, MEL dispatch criteria for hydraulic system components, and recurrent training on non-normal and abnormal hydraulic configurations remain critical areas of focus industry-wide. As global air traffic recovers to record volumes and aircraft utilization rates climb, any erosion in maintenance margins or component reliability across long-haul fleets carries outsized safety implications. Pilots and operators should watch for the DGCA's formal investigation findings and any subsequent airworthiness directives, as a confirmed multi-system hydraulic failure—if substantiated—could prompt fleet-wide inspections, revised maintenance intervals, or updated QRH guidance applicable well beyond a single carrier or aircraft type.