Emirates EK73

Debris during the climb

Emirates EK73 departed Dubai International Airport on 6 February 2025 for Charles de Gaulle Airport in France. The scheduled passenger service was operated by Airbus A380-861 A6-EOL. During the initial climb, the air intake cowl of its No. 1 engine sustained damage. The affected engine was the left outboard engine, and cabin crew reported debris being released from its intake cowl.

The flight crew assessed the situation and coordinated with air traffic control and Emirates' Maintenance Control Center. They elected to return to Dubai. The aircraft subsequently made an overweight landing without further incident. There were no injuries. The damage identified by investigators involved the air intake cowl and associated components of the nacelle anti-ice system.

Recovering the evidence

The UAE Air Accident Investigation Sector, AAIS, opened an investigation under Annex 13 to the Convention on International Civil Aviation and the applicable national legislation. France's BEA was notified as the authority for the aircraft's State of Design and State of Manufacture. The BEA appointed an accredited representative, with advisers from Airbus and Safran participating in the technical work.

Investigators examined and documented the aircraft damage. They recovered the affected intake cowl and associated nacelle anti-ice components for further examination. Their detailed component work covered the feed pipe, protection pipe, female socket and graphite sleeve. Recovered parts underwent laboratory examination and were compared with similar components removed from other Airbus A380 aircraft.

The investigation also reviewed operational information, maintenance records, the aircraft's history, minimum equipment list application and technical documentation. Both the digital flight data recorder and cockpit voice recorder were downloaded and analysed. Interviews covered flight crew, cabin crew and relevant operational personnel. Airbus, Safran, Emirates and other specialists contributed to coordination over the examinations and technical assessments.

The graphite sleeve concern

The component examinations identified indications of a progressive degradation mechanism associated with the graphite sleeve in the nacelle anti-ice feed pipe female socket. AAIS initiated further technical assessment to establish the extent of the condition and the need for additional risk mitigation. Work on the maintenance documentation included component maintenance instructions, inspection requirements and continuing airworthiness information.

Three inspection concerns emerged. Existing maintenance documentation provided no specific graphite sleeve wear limits or acceptance criteria. There was no dedicated scheduled inspection task to monitor the sleeve's condition. Available inspection methods might also provide insufficient access to assess that condition fully while the component remained installed.

A further concern involved continued operation with the nacelle anti-ice valve locked open under minimum equipment list provisions. AAIS identified that this could increase the exposure of degraded components to continuous thermal and mechanical loading. Investigators were evaluating the operational implications of dispatch in that configuration, alongside the relationship between sleeve wear, operational exposure and the possible progression of degradation.

Inspection and mitigation work

By the interim statement's release, technical assessment of the anti-ice components and the sleeve degradation mechanism was still in progress. AAIS was reviewing whether existing inspection methods, maintenance instructions and continuing airworthiness documentation were adequate. It was also assessing whether maintenance practices could detect graphite sleeve degradation before component functionality was lost.

Airbus, working with Safran and EASA, initiated technical assessments for mitigation measures. These included defining inspection criteria and acceptable sleeve wear limits, developing inspection instructions and updating maintenance data. The manufacturers were also assessing whether fleet inspections were needed and evaluating possible component replacement or repair solutions.

Emirates began coordinating with the manufacturers and investigators to help identify affected aircraft and facilitate required inspections or maintenance actions. AAIS continued monitoring the manufacturers' safety actions and coordinating consideration of interim measures. The investigation was also monitoring similar findings in the Airbus A380 fleet equipped with Engine Alliance GP engines, and assessing the need for wider inspection or maintenance requirements.

The investigation remains open

AAIS released its interim statement on 5 February 2026. The investigation was not complete, and findings may change as further evidence becomes available. The statement set out the flight's return, the damaged components, the indications of sleeve degradation and the safety concerns already identified. The technical assessment of the degradation mechanism and the evaluation of further protective measures were continuing.

AAIS said the completed investigation would provide the full analysis, findings, conclusions and any safety recommendations. At the interim stage, it continued to consider whether additional action was required before that work finished. The maintenance criteria, inspection instructions, possible fleet inspections and replacement or repair options were being assessed through the coordinated technical work.