UK investigators are examining a Gulfstream G550 which damaged the instrument landing system at London Stansted during an early morning arrival, forcing a downgrade of its low-visibility capability.
While the Air Accidents Investigation Branch confirms that it is probing the incident, it has not given details of the jet involved.
But a source familiar with the situation indicates that the aircraft is a Saudi-registered airframe (HZ-A6) and that it touched down some 25m (80ft) short of the runway threshold while landing at about 03:30 on 10 December.
The aircraft struck an antenna and suffered undercarriage door damage as well as scratches.
Stansted’s operator has not given any detail about the event beyond confirming that a G550 was involved and that the aircraft “landed safely”. It states simply that the incident "resulted in some damage to our ILS".
NOTAM information for the airport states that the runway 04 ILS has been “withdrawn from service” and that the runway 22 ILS is downgraded to Category I.
Poor weather at Stansted combined with the ILS damage forced the subsequent diversion of several flights.
UK air traffic control service NATS, which is responsible for the ILS, has been working to restore the full capability of the system.