The Airbus Helicopters EC135 / H135 is a lightweight five/seven seat twin-turbine-engine multi-role helicopter with a radius of 720 km.
The EC135 is offered with either Safran Helicopter Engines (former: Turbomeca) Arrius 2B2 or Pratt & Whitney PW206B2 engines.
Development of the Eurocopter EC135 started in the 80s as the MBB Bo.108 Advanced Technology Helicopter. The prototype BO108 with
conventional tail rotor flew first on 15 October 1988. When the helicopter divisions of MBB from Germany and Aérospatiale from
France merged in January 1992 to form the Eurocopter Group, the Bo108 program was transferred as well. An advanced low noise ducted
10-blade Fenestron tail rotor was, next to other modifications, incorporated into the design and the name of the helicopter was
changed into Eurocopter EC135. The prototype of the EC135 (D-HBOX s/n S-01) flew first on 15 February 1994 and went in series
production in 1996 at Donauwörth. On 14 June 1996, the German certification was granted by the LBA and the first customer delivery
followed on 31 July that year. Next to the EC135 a special military version was developed designated the Eurocopter EC635. The
EC635 has a structural reinforcement of cabin structure and can be equipped with wire-guided, laser-guided, autonomous missiles. Over
1300 EC135 / H135 / H135M airframes have been delivered since the helicopter entered service in 1996. In March 2015, Airbus Helicopters
changed the marketing name for its entire product line to better reflect its closer allignment with ist parent company and simplify the
naming convention for the portfolio. That is why the EC135 T3/P3 has since been marketed as “H135” as stated in revison No.EASA.R.009 Issue:
07 of the Type Certificate Data Sheet for EC135 dated 18 March 2015. “H135M” is used as marketing designation for the military EC635 P3(CPDS);
EC635 P3H; EC635 T3(CPDS) and EC635 T3H helicopters. The ICAO Aircraft Type Designator for the EC135 / H135 helicopters is EC35.
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.
RTH (Rettungstransporthubschrauber) Eurocopter EC135 T2+ D-HZSG of the Bundesminsterium des Innern / Katastrophenschutz
was seen at the helipad of the Luftrettungsszentrum Hannover at the parking garage roof of the Medizinische Hochschule
Hannover (MHH) in Germany when in service as "Christoph 4". The RTH facilities at the the Medizinische Hochschule
Hannover (MHH) in Hannover were opened on 2 October 1972. On that day, operations of "Christoph 4" started in the
Hannover area as a test with a MBB Bölkow Bo.105 C in yellow 'Katastrophenschutz' colours. Around 1977, the colours
'Katastrophenschutz' helicopters changed to orange. In 1984, the MBB B0.105CBS in service with "Christoph 4" was
replaced by a Dornier-Bell UH-1D medical helicopter of the BMI - Bundesministerium des Inneren, o/b Bundesgrenzschutz Fliegerstaffel
Nord. In December 1997, the Dornier-Bell UH-1D was replaced by a MBB Bo.105CBS-5. On 1 July 2005, the Bundesgrenzschutz Fliegerstaffel
Nord was renamed Bundespolizeifliegerstaffel Nord. In 2007, the MBB BO.105CBS-5 in service as "Christoph 4" was replaced by
Eurocopter EC135 T2+ D-HZSD.
As the MBB BO.105CBS-5, the Eurocopter EC135 T2+ "Christoph 4" is flown by the Bundespolizeifliegerstaffel Nord. Call sign "Christoph"
is used for the German lifeliner helicopters since 1970 and is derived of Saint Christophorus, the Patron Saint for all travellers.
On 31 January 2007, the BMI - Bundesministerium des Inneren (German Ministry of the Interior) took delivery of the
first pair of a total of sixteen EC135T2+ air rescue helicopters ordered for the BBK - Bundesamtes für Bevölkerungsschutz
und Katastrophenhilfe. The EC135 T2+ air rescue helicopters replaced the ageing MBB Bo.105 helicopters in service.
Eurocopter Germany used test-registration D-HTSF for the 2007-built Eurocopter EC135 T2+ s/n 0592. On 12 October 2007,
the EC135 T2+ was registered D-HZSG with BMI - Bundesministerium des Inneren. On 17 August 2013, the helicopter was
damaged in an emergency landing in Dornberg. In 2015, the EC135 T2+ D-HZSG was noted back in service after repaires.
Today, all EC135 T2+ air rescue helicopters operated by the Luftrettung / BMI in the Northern part of Germany have
special dustfilters to protect the engines when they have to land on the fields.