B789, vicinity Hong Kong China, 2019

B789, vicinity Hong Kong China, 2019

Summary

On 18 October 2019, a Boeing 787-9 descending to 4,500 feet to join the ILS for runway 25R at Hong Kong at 15 nm from touchdown failed to establish on the localiser. The autopilot was disconnected and the aircraft manually positioned onto the localiser from the north, establishing at 12 nm with terrain proximity not sufficient to activate the EGPWS. It was found that the deviation was attributable to an anomaly in the aircraft type Autopilot Flight Director System, and a corresponding Alert Service Bulletin was issued by Boeing to replace the faulty system component.

Description

On 18 October 2019, a Boeing 787-9 (G-VBOW) operated by Virgin Atlantic Airlines on a scheduled international passenger flight from London Heathrow to Hong Kong as VIR 206 failed to capture the ILS LOC for its final approach to runway 25R at destination in day VMC. After disconnection of the AP, the deviation to the north towards high terrain was corrected manually and the aircraft established on the LOC with the remainder of the flight being without further event. 

Note: A third runway to the north of and parallel to the two runways which existed at the time of this event was being constructed at Hong Kong when this event occurred. It was completed whilst the Investigation was in progress and the original runway 07L/25R was then re-designated as 07C/25C in preparation for the commissioning of the new runway in early 2022.

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