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Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 6. PDF page 6.

without risk, on the aeroplane's flight path. The PF specified that when he reduced the tilt of the airborne weather radar (see paragraph 2.4.3) to analyse the echo he had identified in the distance, the echo 11 The investigation was
Open final report at PDF page 6Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent

Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 7. PDF page 7.

disappeared. He increased the tilt and yellow spots then appeared in the green echoes situated nearby. Suddenly, a small red radar echo appeared on the flight path ahead of them, just before the ND became completely
Open final report at PDF page 7Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent

Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 11. PDF page 11.

clarified certain elements of the investigation: � the airborne weather radar parameters: tilt and gain18 (see paragraph 2.4.3); � the airborne weather radar data displayed on the ND. The BEA investigators had no recording of the radar data available to
Open final report at PDF page 11Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent

Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 12. PDF page 12.

dry snow. Different types of airborne weather radar exist: � manual radars where the tilt is adjusted manually by the flight crew, with the setting either shared by both ND or independent for each ND; � autotilt radars where the
Open final report at PDF page 12Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent

Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 13. PDF page 13.

weather radar manufactured by Collins Aerospace. It is a manual radar with a shared tilt setting for both ND. It displays on each ND, the strength of the precipitation in contrasting colours against a black background. The areas of precipitation
Open final report at PDF page 13Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent

Air France F-HBNJ: severe turbulence during descent to Ajaccio

Printed page 14. PDF page 14.

Figure 4: detectability according to tilt (source: Airbus) The radar on F-HBNJ was tested at the manufacturer's, Collins Aerospace. No failure that might have contributed to the accident sequence was brought to light. As t
Open final report at PDF page 14Accident to the Airbus A320 registered F-HBNJ operated by Air France le 20/08/2025 near Ajaccio AD Flight through an area of severe convective turbulence, during descent