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ASN Wikibase Occurrence # 78917
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Time:09:50 LT
Type:Silhouette image of generic AS55 model; specific model in this crash may look slightly different
Aérospatiale AS 355F2 Ecureuil II
Owner/operator:Police Service of Northern Ireland
Registration: G-SEWP
MSN: 5480
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Shanlieve Hill, Mourne Mountains, Northern Ireland -   United Kingdom
Phase: Landing
Nature:Aerial patrol
Departure airport:Belfast International Airport (BFS/EGAA)
Destination airport:
Investigating agency: AAIB
The pilot lost control of the helicopter whilst manoeuvring at low speed to approach a hilltop landing site in quite strong wind conditions. It descended rapidly with increasing forward ground speed, before striking the ground short of the point of intended landing and passing through a substantial stone wall. The helicopter was destroyed but the occupants suffered only minor injuries. The investigation determined that an error of judgement or perception led the pilot to attempt a downwind approach. A combination of human factors was thought to have contributed to the accident

The helicopter was engaged on a task for the Police Service of Northern Ireland (PSNI), ferrying personnel and equipment to and from the site of a helicopter accident which had occurred 5 days earlier, on 23 October 2010. The site was in the Mourne Mountains, near to the top of the 626 m (2,054 ft) amsl Shanlieve hill. A PSNI control point, from where passengers embarked for the ferry flights, had been established in a valley about 3 km from the site.


1. AAIB:
2. CAA:

Accident investigation:
Investigating agency: AAIB
Status: Investigation completed
Download report: Final report


Photo of G-SEWP courtesy

Saggart - Citywest Hotel Heliport
21 April 2009; (c) Gerry Barron

Revision history:

28-Oct-2010 06:56 saf7670 Added
28-Oct-2010 09:05 John Baker Updated [Aircraft type, Total occupants, Country, Phase, Source, Narrative]
28-Oct-2010 09:10 lanzaferg Updated [Other fatalities, Source]
28-Oct-2010 11:26 TB Updated [Aircraft type, Registration, Cn, Operator, Damage]
29-Oct-2010 15:02 John Baker Updated [Aircraft type, Registration, Cn, Source]
30-Oct-2010 03:03 TB Updated [Time, Aircraft type, Nature]
16-Sep-2012 15:39 Dr. John Smith Updated [Time, Location, Phase, Departure airport, Source, Embed code, Narrative]
14-Oct-2012 15:56 Dr. John Smith Updated [Location, Departure airport, Source, Embed code, Narrative]
17-Dec-2014 12:51 Dr. John Smith Updated [Source, Narrative]
25-Oct-2015 11:44 Aerossurance Updated [Time, Phase, Source, Damage]
23-May-2016 19:50 Aerossurance Updated [Time, Aircraft type, Narrative]
24-Nov-2016 20:25 Dr.John Smith Updated [Source]

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