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The Directorate General of Civil Aviation (DGCA), India’s aviation regulator, sought a detailed report from aviation major Boeing following the uncommanded deployment of the Ram Air Turbine (RAT) on Air India flight
AI-117 at Birmingham earlier this month.
The Ram Air Turbine (RAT) is an emergency system providing backup power if an aircraft loses engines, hydraulics or electrical systems.
The DGCA advised Air India to reinspect the RAT stowage on all affected aircraft with focus on those with recently replaced power conditioning modules (PCMs).
“Boeing has been requested to submit a comprehensive report outlining the preventive measures to be implemented in respect of the uncommanded RAT deployment incident, global data on similar incidents reported in the Boeing 787 fleet, as cited in the company’s Fleet Team Digest, and details of any service difficulty reports from operators worldwide following Power Control Module (PCM) changes,” a senior official from India’s aviation regulator was quoted as saying by news agency ANI.
The aviation regulator also ordered Air India to review the “D” Check work package to ensure that all required actions related to the PCM module replacement have been properly implemented.
The official mentioned above told the news agency that they will re-inspect RAT stowage on all Boeing 787 aircraft where the PCM module was replaced recently.
Air India flight AI-117, a Boeing 787-8 aircraft (VT-ANO), was en route from Amritsar to Birmingham when the RAT (Rapid Air Turn) deployed unexpectedly at an altitude of 400 feet during landing on October 4, 2025. The pilot reported no abnormalities, and the aircraft landed safely without incident.
Regarding RAT deployment, the official stated, “Further investigation is in process.” The RAT is a critical safety device that deploys in emergencies, such as electrical or hydraulic failures, to provide backup power.
Boeing said maintenance checks following the uncommanded RAT deployment were completed and no issues were found. The aircraft was cleared for service and returned to Delhi on October 5, 2025, an official said.
The DGCA’s ongoing investigation seeks to determine the cause of the unexpected RAT deployment and ensure measures are implemented to prevent similar incidents in the future.
