Air India A320neo Lost Flight Controls, Dropped 300 Feet in Hydraulic Failure Incident

On August 4, an Air India Airbus A320neo operating flight AI2379 from Phuket International Airport (HKT) to Delhi Indira Gandhi International Airport (DEL) experienced a severe loss of flight control, resulting in a rapid 300-foot descent in just four seconds. The aircraft lost functionality in its elevators and ailerons—the crucial control surfaces for pitch and bank—rendering the pilots unable to maneuver the plane effectively during that critical period.

Airbus's initial investigation into the incident indicated that all three hydraulic systems on the aircraft failed simultaneously, which is a rare and serious malfunction. Hydraulic systems are vital as they power flight control surfaces, and the sudden loss severely compromised the pilots’ ability to control pitch and bank movements. The autopilot disconnected during the event, and the first officer’s attempts to counteract the aircraft’s pitch by pushing the control stick forward did not immediately produce a response.

The flight, a nonstop four-hour journey departing Phuket at 8:41 AM local time, was operated by a seven-year-old Airbus A320neo registered VT-EXO. After the hydraulic failure and resulting plunge, the hydraulic systems re-engaged within seconds, allowing the pilots to regain control and stabilize the aircraft. Despite the quick recovery, 24 passengers and crew members sustained injuries, many resulting from violent movement inside the cabin, with some unrestrained occupants striking interior surfaces during the sudden altitude drop.

Following the incident, Airbus requested that Air India conduct thorough checks on the affected airplane’s hydraulic systems as well as sensors monitoring system pressure. Several sensors have been removed for inspection, and detailed wiring checks are underway to identify any underlying faults. Airbus also reviewed the aircraft’s maintenance logs and found that the plane underwent forces above specified safety limits during the altitude change, prompting inspections for structural damage.

Air India has been cooperating with relevant authorities during the ongoing investigation into the serious incident classification. Initial statements from Air India described the event as turbulence-related, describing a sudden loss of altitude. However, data retrieved from the aircraft's digital flight data recorder confirmed the simultaneous failure of the three hydraulic systems as the root cause. This unprecedented failure highlights critical vulnerabilities in the aircraft's control systems requiring urgent attention.

In an unrelated but relevant development, post-incident drug testing revealed the flight’s captain tested positive for marijuana use. Air India has stated there is no established link between this and the hydraulic failure that caused the altitude loss. Nevertheless, the airline has instituted mandatory substance testing for all operating pilots to enhance safety protocols and regulatory compliance.

The aircraft has been grounded in New Delhi since the incident, with further maintenance and safety inspections planned before it can return to service. The incident has sparked concern about redundancy and reliability of hydraulic systems on Airbus A320neos, prompting calls for comprehensive checks across operators flying similar fleet types to prevent recurrence.

This serious hydraulic failure emphasizes the critical need for rigorous system monitoring and maintenance of flight controls, especially as airlines operate aging aircraft with increasingly complex technology. The findings and outcomes of Air India's investigation will be closely scrutinized by the aviation industry to bolster safety standards and prevent similar incidents globally.