Serious incident Gulfstream G550 HZ-A6, Tuesday 10 December 2013

This record has been locked for editing.

Date:	Tuesday 10 December 2013
Time:	03:25
Type:	Gulfstream G550
Owner/operator:	Alpha Star Aviation Services
Registration:	HZ-A6
MSN:	5038
Year of manufacture:	2004
Fatalities:	Fatalities: 0 / Occupants: 5
Other fatalities:	0
Aircraft damage:	Unknown, repaired
Category:	Serious incident
Location:	London-Stansted Airport (STN) - United Kingdom
Phase:	Landing
Nature:	Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:	Riyadh-King Khalid International Airport (RUH/OERK)
Destination airport:	London-Stansted Airport (STN/EGSS)
Investigating agency:	AAIB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
A Gulfstream G550 corporate jet, HZ-A6, sustained damage in a landing accident at London-Stansted Airport (STN), U.K.
The aircraft was carrying out a charter flight from Riyadh in Saudi Arabia to London Stansted Airport. It was radar vectored for a CAT I, ILS DME approach to runway 22 at Stansted with the autopilot (AP) and autothrust (AT) engaged. Conditions at the time were below the CAT I approach minima. With the aircraft fully established on the approach, the AP and AT were disengaged at 1,600 ft aal and the aircraft was hand flown by the captain for the remainder of the approach and landing. The localiser was maintained, but the aircraft flew above the glidepath before descending through it. For reasons that could not be established, go-around mode was selected, which would have inhibited the EGPWS glideslope warnings. In the final stages of the approach the aircraft was well below the glideslope, causing it to strike the runway 22 ILS localiser monitor aerial and the runway 04 localiser aerial array, before touching down short of the runway 22 threshold.

The accident occurred as a result of the pilot continuing to land from a destabilised approach, rather than performing a go-around.

Accident investigation: