# NTSB ENG15WA019: Airbus A330 - 201, Athens, Greece, Greece, December 26, 2014

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: December 26, 2014
- Place: Athens, Greece, Greece
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute-cruise: Nav system malfunction/failure](https://openairdocs.org/ntsb-events/335)
- Highest injury: No injuries
- Status: Led by another country's authority
- NTSB office: Aviation Engineering Division
- Lead agency: Other
- NTSB case key (mKey): 91119
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ENG15WA019
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/91119/pdf
- Page: https://openairdocs.org/ntsb/ENG15WA019

## Factual narrative

On 12/26/2014 an Airbus A330 operated by XL Airways took off from La Réunion (Indian Ocean) to Marseille (France). The information provided by the three inertial reference systems became successively unavailable, leading autopilot + auto-thrust to disconnect, and attitude and navigation information to be lost. The crew diverted to Athens (Greece) using back-up instruments and flight controls direct law and landed uneventfully in good weather conditions. The incident is being investigated by the Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile (BEA). The NTSB has been appointed an Accredited Representative to assist the BEA in the investigation as the state of design of the Air Data Inertial Reference Unit (ADIRU). All inquiries concerning this accident should be directed to the BEA at: Aéroport du Bourget Zone Sud – Btiment 153 200 rue de Paris 93352 Le Bourget Cedex France Tél. : +33 1 49 92 72 00 Fax : +33 1 49 92 72 03 Website: www.bea.aero

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Enroute-cruise: Nav system malfunction/failure](https://openairdocs.org/ntsb-events/335) (defining event)

## Aircraft

- Registration: F-GRSQ (not matched to a registry record)
- Reported make and model: AIRBUS A330 - 201 (201)
- Category: Airplane
- Serial number: 501
- Damage: No damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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