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  Aircraft History, Specification and Information
de Havilland DHC-6 Twin Otter
Maldivian Air Taxi - 8Q-MAQ - deHavilland DHC-6-300 Twin Otter
1979 deHavilland DHC-6-300 Twin Otter
8Q-MAQ (sn 611) Maldivian Air Taxi
Photo taken January 2009 at "Picnic Island" (Republic of Maldives) while waiting for Japanese tourists to finish their lunch after they have done some snorkelling on this miniature island.
Photo © Marcel Siegenthaler

The DHC-6 Twin Otter (Nickname: Twotter) is a Canadian 19-passenger STOL (Short Takeoff and Landing) utility aircraft developed by de Havilland Canada and currently produced by Viking Air. The aircraft's fixed tricycle undercarriage, STOL abilities and high rate of climb have made it a successful cargo, regional passenger airliner and MEDEVAC aircraft. In addition, the Twin Otter has been popular with commercial skydiving operations, and is used by the United States Army Parachute Team and the United States Air Force's 98th Flying Training Squadron.

Design and development

Twin Otter DHC-6-100 - C-GTKB - Kenn Borek Air / Unaalik Aviation
1967 DHC-6-100 Twin Otter
C-GTKB (sn 60)
Kenn Borek Air / Unaalik Aviation
The only remaining Series 100 Twin Otter in the Kenn Borek fleet.
Photo taken Mar. 20, 2012
Kimmirut, NU - Canada (YLC / CYLC)
Photo © Marcel Siegenthaler
1969 de Havilland DHC-6-300 Twin Otter HP-1283 Aeroperlas Regional
1969 de Havilland DHC-6-300 Twin Otter
HP-1283 (sn 269)
Aeroperlas Regional Twin Otter shortly after the ferry flight from Panama.
Photo taken June 07, 2010 @ Calgary - Springbank Airport, AB - Canada (YBW / CYBW)
Photo Copyright & Thanks to
Michael Denton
Twin Otter DHC-6-200 - N901ST - Chicagoland Skydiving Center
1969 Twin Otter DHC-6-200
N901ST (sn 208)
CSC Chicagoland Skydiving Center
Photo taken Aug. 2010
Hinckley Airport, IL - USA (0C2)
Photo © Marcel Siegenthaler
Cockpit View Of Maldivian Air Taxi DeHavilland DHC-6-300 Twin Otter - 8Q-MAR - Flightdeck - Instrument Panel
Cockpit view of 8Q-MAR a Maldivian Air Taxi (MAT) deHavillandCanada DHC-6-300 Twin Otter.
Photo taken August 11, 2008
Male' International Airport Seaplane Base, Republic of Maldives (MLE)
Photo © Marcel Siegenthaler
DeHavilland DHC-6 Twin Otter - Upper Control Panel with Power Levers, Propeller Levers, Fuel Levers, Flap Handle
DeHavilland DHC-6 Twin Otter
Upper Control Panel with Power Levers, Propeller Levers, Fuel Levers, Flap Handles
8Q-MAR Maldivian Air Taxi
DeHavilland DHC-6-300 Twin Otter
Photo taken August 11, 2008
Male' International Airport Seaplane Base, Republic of Maldives (MLE)
Photo © Marcel Siegenthaler
Pratt & Whitney PT6A-27 DeHavilland DHC-6 Twin Otter Engine - TurboProp Power Plant
DeHavilland DHC-6 Twin Otter Engine
Pratt & Whitney PT6A-27
TurboProp Power Plant
8Q-MAR Maldivian Air Taxi
DeHavilland DHC-6-300 Twin Otter
Photo taken August 11, 2008
Male' International Airport Seaplane Base, Republic of Maldives (MLE)
Photo © Marcel Siegenthaler
Trans Maldivian Airways TMA - DHC-6 Twin Otter's
A lineup of Trans Maldivian Airways (TMA) DHC-6 Twin Otter's @ the Male Seaplane Base.
Photo taken Aug. 2008
Male International Airport, Republic of Maldives (MLE / VRMM)
Photo © Marcel Siegenthaler
Fuerza Aerea De Chile / Chile Air Force - DeHavilland Twin Otter DHC-6-100
DeHavilland Canada DHC-6-100
Twin Otter #940 (sn 24)
Fuerza Aerea De Chile / Chile Air Force
Photo taken March 30, 2006
Santiago Arturo Merino Benitez (Pudahuel) Airport, Chile (SCL / SCEL)
Photo Copyright & Thanks to
Normando Carvalho Jr.
Twin Otter - De Havilland DHC-6-300 - Float Plane - 8Q-MAV - Maldivian Air Taxi - Air to Air Photo - Above Lhaviyani Atoll, Republic Of Maldives
Maldivian Air Taxi (MAT) 8Q-MAV Twin Otter flying low above the Lhaviyani Atoll, Republic of Maldives.
Photo taken October 07, 2008
Photo © Marcel Siegenthaler
8Q-TMA DHC-6-100 Twin Otter Trans Maldivian Airways (TMA)
de Havilland DHC-6-100
Twin Otter Floatplane 8Q-TMA
Trans Maldivian Airways (TMA).
Photo taken November 07, 2005
Dhuni Kolhu Island, Maldives
Photo Copyright & Thanks to
Miguel Cláudio
de Havilland DHC-6-100 Twin Otter - Arctic Sunwest - C-FASQ - Twin Engine TurboProp Aircraft - Whitehorse Airport
De Havilland Canada
DHC-6-100 Twin Otter
C-FASQ (sn 78)
Arctic Sunwest
Photo taken May 20, 2007
Whithorse Airport, YT Canada (YXY)
Photo © Marcel Siegenthaler
De Havilland DHC-6 Twin Otter - Full Motion Flight Simulator - Level B - Flight Safety, Toronto - FAA Approved
Twin Otter "Level B" full motion flight simulator at FlightSafety Toronto, Canada
Photo © Marcel Siegenthaler
Twin Otter - DeHavilland DHC-6-200 - N181CS - Twotter - DHC6
1968 De Havilland Canada
DHC-6-200 Twin Otter
N181CS (sn 181)
The "Twotter" waits for another load of jumpers. Operated by a local skydiving club at Lake Wales Airport.
Photo taken April 25, 2007
Lake Walest, FL - USA (X07/KX07)
Photo © Marcel Siegenthaler

Development of the aircraft began in 1964, with the first flight on May 20, 1965. A twin-engined replacement for the single-engined Otter had been planned by de Havilland Canada. Twin engines not only provided improved safety but also allowed for an increase in payload while retaining the renowned STOL qualities. Design features included double slotted trailing edge flaps and ailerons that work in unison with the flaps to boost STOL performance. The availability of the 550 shp (410 kW) Pratt and Whitney Canada PT6A-20 propeller turbine engine in the early 1960s made the concept of a twin more feasible. To bush operators, the improved reliability of turboprop power and the improved performance of a twin-engined configuration made it an immediately popular alternative to the single engine, piston-powered Otter which had been flying since 1951.

The first six aircraft produced were designated Series 1, indicating that they were prototype aircraft. The initial production run consisted of Series 100 aircraft, serial number seven to 115 inclusive. In 1968, Series 200 production began with serial number 116. Changes made at the beginning of Series 200 production included improving the STOL performance, adding a longer nose that was equipped with a larger baggage compartment (except to aircraft fitted with floats) and fitting a larger door to the rear baggage compartment. All Series 1, 100 and 200 aircraft and their variants (110, 210) were fitted with the 550 shaft horsepower PT6A-20 engines.

In 1969, the Series 300 was introduced, beginning with serial number 231. Both aircraft performance and payload were improved by fitting more powerful PT6A-27 engines. This was a 680 hp (510 kW) engine that was flat-rated to 620 hp (460 kW) for use in the Series 300 Twin Otter. The Series 300 proved to be the most successful variant by far, with 614 Series 300 aircraft and their sub-variants (Series 310 for United Kingdom operators, Series 320 for Australian operators, etc.) sold before production ended in 1988.

New production

After Series 300 production ended, the remaining tooling was purchased by Viking Air of Victoria, British Columbia, who manufacture replacement parts for all of the out of production de Havilland Canada aircraft. On February 24, 2006 Viking purchased the type certificates from Bombardier Aerospace for all the out of production de Havilland DHC-1 through DHC-7 aircraft. The ownership of the certificates gives Viking the exclusive right to manufacture new aircraft.

On July 17, 2006, at the Farnborough Air Show, Viking Air announced its intention to offer a Series 400 Twin Otter. On April 2, 2007 Viking announced that with 27 orders and options in hand, it was restarting production of the Twin Otter, equipped with a more powerful Pratt & Whitney Canada PT6A-34/35 engine. As of November 2007, 40 firm orders and 10 options had been taken and a new final assembly plant established in Calgary, Alberta. Zimex Aviation of Switzerland received the first new production aircraft, serial number 845, in July 2010.

Major changes introduced with the Series 400 include Honeywell Primus Apex fully integrated avionics, deletion of the AC electrical system, deletion of the beta backup system, modernization of the electrical and lighting system, and use of composites for non-load-bearing structures such as doors.

Announced orders

  • Peruvian Air Force (12)
  • Air Loyaute (2)
  • Air Moorea (2)
  • Air Seychelles (2)
  • Airfast Indonesia (4)
  • European Coastal Airlines (6)
  • Global Aerospace Logistics (GAL) (10), Order placed June 16, 2009
  • Loch Ard Otters (6 plus 6 options)
  • Montenegro Charter Company (1)
  • Maldivian Air Taxi (2)
  • Petro Air (1)
  • Trans Maldivian Airways (5)
  • United States Army Parachute Team (3)
  • Vietnamese People's Navy (6)
  • Vityaz Avia Corporation (2)
  • Zimex Aviation (1)

Possible international Twin Otter production

Over the decades several organizations were interested in production of the versatile DHC-6 Twin Otter, the rights to which were acquired in 2006, with several other de Havilland Type Certificates, by Viking Air of Victoria, British Columbia. In February 2011, PT Dirgantara Indonesia of Indonesia discussed the possibility of Twin Otter production at their facilities.

Operational history

Twin Otters could be delivered directly from the factory with floats, skis or tricycle landing gear fittings, making them adaptable bush planes for remote and northern areas including Canada and the United States, specifically Alaska. Many Twin Otters still serve in the far north, but they can also be found in Africa, Australia, Antarctica and other regions where bush planes are the optimum means of travel. Their versatility and maneuverability have made them popular in areas with difficult flying environments, including Papua New Guinea. In Norway, the Twin Otter paved the way for the network of short-field airports, connecting the rural areas with the larger towns with outstanding reliability, and remained in service until 2000 on certain routes. Widerøe of Norway was, at one time, the world's largest operator of Twin Otters. During one period of its tenure in Norway, the Twin Otter fleet achieved over 96,000 cycles (takeoff, flight and landing) per year.

Twin Otters are a staple of Antarctic transportation. Four Twin Otters are employed by the British Antarctic Survey on research and supply flights, and several are employed by the United States Antarctic Program via contract with Kenn Borek Air. On April 24–25, 2001, two Twin Otters performed the only winter flight to Amundsen-Scott South Pole Station to perform a medical evacuation.

The Argentine Air Force used them on Antarctica since the 1970s with at least one of them deployed the whole year at Marambio Base. The Chilean Air Force also operates the type from 1980, usually having an example based at Presidente Frei antarctic base of South Shetland islands.

As of August 2006, a total of 584 Twin Otter aircraft (all variants) remain in service worldwide. Major operators include: Libyan Arab Airlines (16), Maldivian Air Taxi (22), Trans Maldivian Airways (23), Kenn Borek Air (42) and Scenic Airlines (11). Some 115 airlines operate smaller numbers of the aircraft including Yeti Airlines in Nepal, Malaysia Airlines which uses the Twin Otter exclusively for passenger and freight transportation to the Kelabit Highlands region in Sarawak, and in the United Kingdom the FlyBe franchise operator Loganair which uses the aircraft to service the island of Barra in the Hebrides islands. This scheduled service is unique as the aircraft lands on the beach and the schedule is partly influenced by the tide tables. The Twin Otter is also used for landing at the world's shortest commercial runway on the Caribbean island of Saba, Netherlands Antilles.
Ontario's Ministry of Natural Resources is also a long-time operator of the Otter.

Transport Canada still owns three DHC-6 Twin Otters, but they now see very limited flying time, as their role in Coastal Surveillance has been replaced by a fleet of DHC-8 aircraft.

The Twin Otter has been popular with commercial skydiving operations. It is able to carry up to 22 skydivers to over 13,500 ft (a large load compared to most other aircraft in the industry); presently, the Twin Otter is used in skydiving operations in many countries. The United States Air Force operates three Twin Otters for the United States Air Force Academy's skydiving team.

On September 25, 2008, the Series 400 Technology Demonstrator achieved "power on" status in advance of an official rollout. First flight of the Series 400 technical demonstrator, C-FDHT, took place October 1, 2008 at Victoria Airport. Two days later, the aircraft departed Victoria for a ferry flight to Orlando, Florida, site of the 2008 National Business Aviation Association (NBAA) Conference and exhibition. The first new build Series 400 Twin Otter (SN 845) made its first flight on February 16, 2010 in Calgary, Alberta. Transport Canada presented Viking Air Limited with an amended DHC-6 Type Certificate including the Series 400 on July 21, 2010.

Variants

  • DHC-6 Series 100
    Twin-engined STOL utility transport aircraft, powered by two 550 shp (432 kW) Pratt & Whitney Canada PT6A20 turboprop engines.
  • DHC-6 Series 110
    Variant of the Series 100 built to conform to BCAR (British Civil Air Regulations)
  • DHC-6 Series 200
    Improved version.
  • DHC-6 Series 300
    Twin-engined STOL utility transport aircraft, powered by two 620 shp (462 kW) Pratt & Whitney Canada PT6A-27 turboprop engines.
  • DHC-6 Series 300M
    Multi-role military transport aircraft. Two of these were produced as "proof-of-concept" demonstrators
  • DHC-6 Series 310
    Variant of the Series 300 built to conform to BCAR (British Civil Air Regulations)
  • DHC-6 Series 320
    Variant of the Series 300 built to conform to Australian Civil Air Regulations
  • DHC-6 Series 300M
    Military version.
  • DHC-6 Series 300S
    Six demonstrator aircraft fitted with 11 seats, wing spoilers and an anti-skid braking system.
  • DHC-6 Series 400
    First delivered in July 2010, powered by two Pratt & Whitney Canada PT6A-34 or optional PT6A-35 Hot & High Performance engines, and available on standard landing gear, straight floats, amphibious floats, skis, wheel skis, or intermediate flotation landing gear.
  • CC-138
    Twin-engined STOL utility transport, search and rescue aircraft for the Canadian Forces.
  • UV-18A
    Twin-engined STOL utility transport aircraft for the U.S. Army Alaska National Guard. Six built. It has been replaced by the C-23 Sherpa in US Army service.
  • UV-18B
    Parachute training aircraft for the United States Air Force Academy. The United States Air Force Academy's 98th Flying Training Squadron maintains three UV-18s in its inventory as freefall parachuting training aircraft, and by the Academy Parachute Team, the Wings of Blue, for year-round parachuting operations.

Operators / Former Operators

Civil operators

(former operators are listed where possible)

Antigua and Barbuda

  • Carib Aviation

Australia

  • Aeropelican - Former operator.
  • Air Queensland - Former operator.
  • Ansett Australia - Former operator.
  • East-West Airlines (Australia) - Former operator.
  • Flight West Airlines - Former operator.
  • MacRobertson Miller Airlines - Former operator.
  • Trans Australia Airlines - Former operator.

Canada

  • Adlair Aviation
  • Air Inuit
  • Air Labrador
  • Air Tindi
  • Airtransit (defunct)
  • Arctic Sunwest (C-FASQ DHC-6-100)
  • Kenn Borek Air
  • Manitoba Government Air Services
  • Ministry of Natural Resources (Ontario) - forest firefighting
  • Nakina Air Service
  • NorOntair - Former operator.
  • North-Wright Airways (C-FNWL DHC-6-300)
  • North Cariboo Air - Former operator.
  • Provincial Airlines
  • Sander Geophysics
  • Transport Canada
  • Transwest Air
  • Viking Air
  • West Coast Air

Cape Verde

  • TACV Cabo Verde Airlines - Former Operator

Cayman Islands

  • Cayman Airways

Chile

  • Aerocord -operates former Los Cedros Aviacion Vistaliner
  • Barrick
  • Aerovías DAP
  • LAN-Chile -former operator, passed aircraft onto Chilean AF
  • Varmontt Air never operated though painted aircraft at Los Cerrillos during the early 2000 years.

People's Republic of China

  • China Flying Dragon Aviation
  • Civil Aviation Administration of China - Former operator.

Colombia

  • Aerolínea de Antioquia
  • Policia Nacional Colombiana

Costa Rica

  • Nature Air

Croatia

  • European Coastal Airlines

Dominican Republic

  • SAP Air Group

East African Community

  • East African Airways - Former operator.

Finland

  • Kar-Air
  • Malmilento
  • Skydiving Club of Finland - Former operator

Fiji

  • Pacific Sun

France

  • Air Loyauté

Greece

  • AirSea Lines

Greenland

  • Air Greenland

Guadeloupe

  • Air Antilles Express
  • Air Guadeloupe

Guyana

  • Guyana Airways - Former operator.

Iceland

  • Air Iceland
  • Norlandair

Indonesia

  • Airfast Indonesia
  • Aviastar Mandiri
  • Merpati Nusantara Airlines
  • Susi Air

Israel

  • SkyKef

Jamaica

  • Air Jamaica Express - Former operator

Kenya

  • Air Kenya
  • KAL Aviation (KALAIR)
  • Skytrail Air Safaris

Madagascar

  • Air Madagascar

Malaysia

  • MASWings a subsidiary of Malaysia Airlines

Maldives

Mali

  • Air Mali (1960-1985)

Malta

  • Harbourair (Malta)

Mauritius

  • Air Mauritius

Mexico

  • Aeronaves Alimentadoras (defunct)

Nepal

  • Nepal Airlines
  • Yeti Airlines

Netherlands Antilles

  • ALM Antillean Airlines - Former operator
  • Dutch Caribbean Airlines - Former operator
  • Windward Islands Airways

New Zealand

  • Mount Cook Airline - Former operator
  • Volcanic Air Safaris

Norway

  • Widerøe - Former operator

Pakistan

  • Pakistan International Airlines - Former operator

Panama

  • Aeroperlas
  • Air Panama

Papua New Guinea

  • Airlines PNG
  • Mission Aviation Fellowship

Paraguay

  • Presidencia de la República del Paraguay

Portugal

  • TAP Portugal - Former operator

Puerto Rico

  • Crown Air
  • Dorado Wings

São Tomé and Príncipe

  • Air São Tomé and Príncipe

Seychelles

  • Air Seychelles

Solomon Islands

  • Solomon Airlines

Sri Lanka

  • Sri Lankan Airlines

Suriname

  • Surinam Airways

Turkey

  • Seabird Airlines

Turks and Caicos Islands

  • Air Turks and Caicos

United Kingdom

  • Aurigny Air Services (Channel Islands) - former operator
  • British Antarctic Survey
  • Jersey European Airways on some services from the Channel Islands in the 1980s - former operator
  • Isles of Scilly Skybus
  • Loganair operating a franchise from FlyBe.
  • North London Skydiving Centre

United States

  • Air Illinois
  • Air Serv International
  • Allegheny Commuter
  • Continental Express
  • Crown Airways (Falls Creek, PA)
  • Frontier Airlines (1950–1986)
  • Golden West Airlines
  • Grand Canyon Airlines
  • NewAir (Formally New Haven Air)
  • Ozark Airlines
  • Pilgrim Airlines - Former operator.
  • Rocky Mountain Airways
  • Scenic Airlines
  • Eastern Metro Express/Metro Airlines (USVI)

United States Virgin Islands

  • Seaborne Airlines

Vanuatu

  • Air Vanuatu

Venezuela

  • Aeropostal - Former operator.
  • Aereotuy - Former operator.

Yemen

  • Yemenia Airlines

Military and police operators

Afghanistan

Argentina

  • Argentine Air Force (Marambio Base) / LADE
  • Argentine Army
  • Argentine Navy

Australia

  • Australian Army
  • Australian Army Aviation

Benin

  • Military of Benin

Canada

  • Royal Canadian Air Force- CC-138 - Operated by 440 Transport Squadron in Yellowknife, NT
  • Royal Canadian Mounted Police

Chile

  • Chilean Air Force (#940 DHC-6-100)

Colombia

  • Colombian National Police

Ecuador

  • Ecuadorian Air Force

Ethiopia

  • Ethiopian Air Force

France

  • French Air Force
  • French Army

Haiti

  • Armed Forces of Haiti

Jamaica

  • Jamaica Defence Force

Malaysia

Mexico

  • Mexican Air Force - Former operator.
  • Mexican Navy - Former operator.

Nepal

  • Nepalese Army Air Service - Former operator.

Nicaragua

  • Nicaraguan Air Force

Norway

  • Royal Norwegian Air Force (Retired from active service)

Panama

  • Panamanian Air Force (until 1988)

Philippines

  • Philippine Air Force

Paraguay

  • Paraguayan Air Force

Peru

  • Peruvian Air Force (12 series-400 recently purchase + 5 legacy series)
  • Peruvian Navy

Sudan

  • Sudanese Air Force

Switzerland

  • Swiss Air Force

Uganda

  • Ugandan Air Force
  • Uganda Police Force Air Wing

United States

  • United States Air Force
  • United States Army
  • National Oceanic and Atmospheric Administration

Vietnam

  • Ordered by Vietnamese Navy, delivery expected 2012-2014

Notable accidents and incidents

  • On June 29, 1972, a DHC-6-100 (N4043B) operating as Air Wisconsin Flight 671 with eight people on board collided in mid-air over Lake Winnebago near Appleton, Wisconsin, with North Central Airlines Flight 290, a Convair CV-580 (N90858) carrying five people. Both aircraft crashed into the lake, killing all 13 people on board.
  • On July 11, 1972, a Norwegian Air Force DHC-6-100 (67-056) crashed into a mountain on Grytøya, killing all 17 people on board. The pilot was later discovered to have been drunk.
  • On March 20, 1973, a DHC-6 operated by the Saudi government crashed into a mountain in Italy, killing all 18 people on board.
  • On January 18, 1978, a Frontier Airlines DHC-6 crashed during a training flight in Pueblo, Colorado killing all three crew members.
  • On November 18, 1978, a DHC-6 flown to Guyana to rescue Americans from the Jonestown cult was shot up by cultists and abandoned on the Port Kaituma airstrip.
  • On July 31, 1981, a Panamanian Air Force (FAP-205) DHC-6 crashed during flight, killing all seven people on board including President Omar Torrijos(seePanamanian Air Force FAP-205 crash).
  • On May 22, 1981 an TAME Ecuador DHC-6 (HC-BAX) crashed into high ground in bad weather with the loss of all 18 on board.
  • On February 21, 1982, Pilgrim Airlines Flight 438, a schedule 2 commuter passenger flight, made an emergency landing on the northwest branch of the Situate Reservoir near Providence, Rhode Island. One passenger was killed, eight passengers had serious injuries.
  • On June 14, 1986 a Canadian Forces DHC-6 (cc13807) crashed on Mount Cox in Kananaskis, Alberta during a search and rescue operation, killing 3 military aircrew and 5 civilian spotters.
  • On June 18, 1986, a Grand Canyon Airlines DHC-6 collided with a Bell 206 helicopter, resulting in the death of all 20 people on board the DHC-6 and all five people on board the helicopter.
  • On October 28, 1989, Aloha IslandAir Flight 1712 crashed in a mountain on approach to Hoolehua Airport at Molokai, Hawaii. The crash killed all 20 on board.
  • On April 12, 1990, Widerøe Flight 839 crashed in the ocean outside Værøy, Norway due to wind, killing all the five people on board. Værøy Airport was closed following the accident.
  • On February 14, 1991, an Ecuadorian Air Force DHC-6 crashed into a mountain, killing the pilot and all 21 passengers on board.
  • On April 22, 1992, a Perris Valley Skydiving DHC-6 lost power at Perris Valley Airport in California, crashing 200 feet (61 m) past the runway, killing 14 skydivers and two crew on board; six skydivers survived.
  • On 27 October 1993, Widerøe Flight 744, operated by a Twin Otter, crashed while approaching Namsos Airport, Høknesøra en route from Trondheim Airport, Værnes, killing the crew and four passengers. A total of 13 survived the crash.
  • On 10 January 1995, a Merpati Nusantara Airlines Twin Otter (Flight 6715) disappeared on a scheduled flight from Bima Airport to Satartacik Airport, Ruteng, Indonesia with the loss of 4 crew and 10 passengers. It appears to have crashed in the Molo Strait in bad weather.
  • On March 24, 2001, an Air Caraïbes DHC-6 crashed in the mountains near Gustaf III Airport on Saint Barthélemy in the French West Indies, resulting in the death of 17 passengers, two crew and one person on the ground.
  • On May 6, 2007, a French Air Force DHC-6 in support of the Multinational Force and Observers in the Sinai Peninsula crashed, killing one Canadian and eight French peacekeepers.
  • On August 9, 2007, Air Moorea Flight 1121 crashed shortly after taking off from Moorea Temae Airport in French Polynesia; the plane was bound for Tahiti. All 20 occupants, including 19 passengers and one crew member, were killed.
  • On October 8, 2008, a Yeti Airlines DHC-6 was destroyed on landing at Lukla in Nepal; 16 passengers and two crew died in the incident, only the pilot survived.
  • On August 2, 2009, Merpati Nusantara Airlines Flight 9760 crashed in Indonesia about 22 kilometres (14 mi) north of Oksibil. All 16 people on board were killed.
  • On August 11, 2009, Airlines PNG Flight 4684 crashed whilst en route from Port Moresby to Kokoda in Papua New Guinea, killing all 13 on board.
  • On December 15, 2010, a DHC-6 Crashed in Nepal. All 22 passengers and crew on board were killed.
  • On January 20, 2011, a Twin Otter Crashed in Ecuador. Six military passengers died.
  • On August 24, 2011, a DHC-6 Twin Otter (9M-MDM), operating as MH3516 from Miri to Lawas crash landed 5 meters short off the river at the end of the Lawas Airport runway; however, all 18 persons on board the aircraft survived, with no serious injuries.
  • On September 22, 2011, a DHC-6 float plane crashed in Yellowknife, Northwest Territories, clipping a condominium and crashing in the street killing two and injuring seven.

Specifications (DHC-6-300 series)

General characteristics
Crew: Minimum one pilot, commonly two pilots, A flight attendant must be on board if there are more than 19 passenger seats.
Capacity: 22 people, of which one is the pilot.
Length: 51 ft 9 in (15.77 m)
Wingspan: 65 ft (19.8 m)
Height: 19 ft 6 in (5.9 m)
Wing area: 420 ft² (39 m²)
Empty weight: between 7,000 lb (3,200 kg) and 8,000 lb (3,628 kg)
Max. takeoff weight: 12,500 lb (5,670 kg)
Powerplant: 2 × Pratt & Whitney PT6A-27 turboprop engines, 620 hp - 680 hp (460 kW - 507 kW) each

Performance
Never exceed speed: 170 knots (195 mph / 314 km/h)
Maximum speed: 170 knots (195 mph / 314 km/h)
Cruise speed: 150 knots (173 mph / 278 km/h)
Stall speed: 58 knots (VSO, gross weight, landing configuration)
Range: 920 nautical miles (1,050 mi / 1,690 km)
Service ceiling: 25,000 ft (7,620 m)
Rate of climb: 1,600 ft/min (8.1 m/s)
Power/mass: 10.08 hp/lb (6.132 kW/kg)

Avionics
Federated system, primarily Collins

Specifications (DHC-6-400 series)

General characteristics
Crew: Minimum one pilot, commonly two pilots are used in commercial operations. A flight attendant must be onboard if there are more than 19 passenger seats.
Capacity: 19 passengers plus 1 or 2 pilots
Length: 51 ft 9 in (15.77 m)
Wingspan: 65 ft (19.8 m)
Height: 19 ft 9 in (5.93 m)
Wing area: 420 ft² (39 m²)
Empty weight: between 7,100 lb (3,200 kg) and 7,500 lb (3,400 kg)
Loaded weight: 12,500 lb (5,670 kg)
Useful load: 5,200 lb (2,360 kg)
Max. takeoff weight: 12,500 lb (5,670 kg)
Powerplant: 2 × Pratt & Whitney PT6A-34 turboprop engines, 620 hp - 750 hp (460 kW - 559 kW) each

Performance
Never exceed speed: 170 knots (195 mph / 314 km/h)
Maximum speed: 170 knots (195 mph / 314 km/h)
Cruise speed: 150 knots (173 mph / 278 km/h)
Stall speed: 58 knots (VSO, gross weight, landing configuration)
Range: 920 nautical miles (1,050 mi / 1,690 km)
Service ceiling: 25,000 ft (7,620 m)
Rate of climb: 1,600 ft/min (8.1 m/s)
Power/mass: 10.08 hp/lb (6.132 kW/kg)

Avionics
Honeywell Primus Apex

Last updated April 08, 2012
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "de Havilland Canada DHC-6 Twin Otter".
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