The Airbus Helicopters EC155 B1 is a medium-weight multi-role utility twin
engine helicopter accommodating up to 12 passengers and 2 crew. The EC155 B is a development of the
AS 365N Dauphin II,
with 40% larger cabin area, a new five-bladed Spheriflex main rotor with
an extremely low vibration level and 'glass cockpit'. The EC155 B1 is
powered by a pair of Turbomeca Arrius 2C2 turbine engines. The new
generation of Fenestron tail rotor takes part in the decrease in
external noise level. This tail rotor has 10 blades spaced irregularly
around the hub. Development of the EC-155, initially known as AS-365N-4
Dauphin started in September 1996. The development of the AS365 N4 wide
body helicopter was announced at International Paris Airshow in June
1997. A mockup of the N4 was shown at the International Paris Air Show
at Le Bourget and on 17 June 1997, the prototype EC155, F-WDFK, a
rebuilt Dauphin, flew first at Marignane. The first pre-poduction EC155
B flew on 11 March 1998. The French Civil Aviation Authority (DGAC) and
the German Government Agencies (LBA) certification was awarded in
December 1998 and the EC 155 got its single-pilot IFR certificate on 25
January 2000. The first three Eurocopter EC 155 Bs were officially
handed over to the German Federal Ministry of the Interior /
Bundesgrenzschutz (BGS) at the Bonn-Hangelaar base of the BGS on 16
March 1999. The EC155 B1 is a development of the EC155 B with more
powerful engines and improved performance at high altitude and in hot
temperature conditions. Deliveries of the EC 155B1 version began in
September 2002. More than 170 EC155s have been sold. The ICAO Aircraft
Type Designator for the EC155 helicopters is EC55. Since March 2015, Airbus Helicopters
uses “H155” as marketing designation for EC155 helicopters.
As a result of the merger between the Eurocopter parents Aérospatiale-Matra; DaimlerChrysler Aerospace (DASA)
and Construcciones Aeronàuticas Sociedad Anonima (CASA) in July 2000, the Eurocopter group became a division of the new formed
EADS (European Aeronautic Defence and Space company). Taking off into 2014, EADS was rebranded as "Airbus Group". Uniting
all its activities under a single brand, its helicopter division Eurocopter was rebranded as Airbus Helicopters on 8 January 2014.
On 29 August 2003, the Airbus Helicopters EC155 B1 c/n 6660
was registered N155EW in the USA with Wells Fargo Bank Northwest NA
Trustee. On 17 November 2003, Dauphin II N155EW was registered with
Tex-Air Helicopters Inc., Houston, Texas.
On 31 March 2005, Tex-Air Helicopters and ERA Aviation merged and the EC155 B1 N155EW was registered with ERA Helicopters
LLC, Lake Charles, Louisiana.
On 20 September 2006, registration N155EW was cancelled as exported to Denmark
and the next day, the aircraft was temporarily registered in Denmark as OY-HSK with
DanCopter A/S, Holsted. On 26 February 2007, the 2003-built EC155 B1 was registered OY-HSK with DanCopter
A/S, Esbjerg. On 19 November 2014, the DanCopter A/S' EC155 B1 Dauphin II
OY-HSK was seen at the Den Helder-De Kooy in Holland.