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The DHC-6 Twin Otter is a high-winged, unpressurised, 19 passenger utility aircraft developed by de Havilland Canada and currently produced by Viking Air, under the operating brand of DHC. The twin engine turbine-powered STOL DHC-6 replaced the single engine DHC-3 Otter, retaining its double slotted trailing edge flaps and ailerons. It has a high rate of climb and can be fitted with floats, skis or tricycle landing gear, making it suitable for remote areas with difficult flying environments or short field rural airports, as well as passenger, cargo, medical evacuation and skydiving operations. Its reliability across all environments and minimal maintenance requirements gave rise to the saying that the only thing that can replace a Twin Otter is another Twin Otter.
Development began in 1964 and the first flight took place on 20 May, 1965. The first six aircraft were prototypes, designated Series 1. The initial production run consisted of Series 100 aircraft, powered by 550 shp Pratt & Whitney Canada PT6A-20 turboprop engines. Series 200 production began in 1968, with improvements to the STOL performance, a longer nose and a larger door to the rear baggage compartment.
Series 300 was introduced in 1969, with improvements to performance and payload thanks to more powerful 680 shp PT6A-27 engines. Production in Toronto by de Havilland Canada ended in 1988.
On 24 February, 2006 Viking Air purchased the remaining tooling and type certificates for all out-of-production DHC aircraft, which gave it exclusive rights to manufacture new aircraft. The Series 400 Twin Otter production programme was started in 2008, giving the aircraft more powerful PT6A-34 engines, fully integrated Honeywell Primus Apex digital avionics suite and around 800 other modifications. Production was suspended in 2019 during the COVID pandemic.
June 2023 saw the launch of the DHC-6 Twin Otter Classic 300-G, the fifth generation of Twin Otter aircraft. It has the same rugged airframe, is propelled by P&W technology, but the lighter weight delivers increased payload range and decreased operating costs. It has an all-new cabin interior and the flight deck features a Garmin G1000 NXi fully integrated avionics suite.
Includes DHC-6 100, DHC-6 200, DHC-6 300, Series 400 and Classic 300-G. Figures given for 300. Now in production by Viking Air
| World fleet | Charter fleet | Typical pax | Cabin volume | Cruise | Range | Years | |
| De Havilland DHC-6-100 | 10 | 7 | 19 | 421 cu ft | 160 kts | 800 nm | 1966 - 1968 |
| De Havilland DHC-6-200 | 10 | 7 | 19 | 421 cu ft | 1968 - 1970 | ||
| De Havilland DHC-6-300 | 196 | 147 | 20 | 421 cu ft | 182 kts | 700 nm | 1970 - 1988 |
| Viking DHC-6-400 | 38 | 32 | 19 | 419 cu ft | 181 kts | 779 nm | 2008 - current |
Browse or search through all recent STCs.
| 26/07/2023 | EASA: 10082436. Main wheel and brake assembly for the Viking Air DHC-6 series aircraft.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100, Viking DHC-6-400 STC holder: Team JAS |
| 20/06/2023 | EASA: 10082199. Removal of Beta Backup System.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100 STC holder: Kenn Borek Air |
| 24/04/2023 | EASA: 10069925. Install Aircraft Wheel and Brake Conversion Kit 199-92, NC, dated 31 March 1986.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100 |
| 13/04/2023 | EASA: 10040247. Installation of either Universal Avionics CVR-120A or CVR-120R in accordance with Transport Canada STC SA11-80, Issue 1.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100 STC holder: Rocky Mountain Aircraft See also: Universal Avionics, an Elbit Systems company |
| 18/05/2022 | EASA: 10079311. Ladder relocation from aft door LH to aft door RH.
De Havilland DHC-6-300 |
| 18/03/2022 | EASA: 10042599. Replacement of nose wheel BF Goodrich 8.90-12.5 P/N 3-1197 by Beringer wheel assembly P/N: RA-008. Revision 2: Update with new servicing instructions within ICA document.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100, Viking DHC-6-400 STC holder: Beringer Aero |
| 18/02/2022 | EASA: 10078650. STC-AT-151 DHC-6 IR suppression system. The standard exhausts are replaced with two modified exhaust tubes which are additionally shielded for IR suppression.
Viking DHC-6-400 STC holder: Airborne Technologies |
| 10/02/2022 | EASA: 10078321. Replacement cargo door latching mechanism on the Viking Air DHC-6 series aircraft.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100, Viking DHC-6-400 STC holder: Team JAS |
| 21/01/2022 | EASA: 10078182. STC-AT-150 DHC-6 MX-25 Integration. A L3 Wescam MX-25 camera is installed in the nose of the aircraft. The associated supporting equipment as commander Workstation is installed in the passenger cabin.
Viking DHC-6-400 STC holder: Airborne Technologies |
| 19/01/2022 | EASA: 10075339. Installation of Acorn Welding C6SC1107-NG exhaust stacks in accordance with Transport Canada Civil Aviation (TCCA) STC SA20-28.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100, Viking DHC-6-400 STC holder: Acorn Welding |
| 14/01/2022 | EASA: 10078142. Installation of a PMA Design and Manufacturing nose landing gear (NLG) shock strut assembly, PDM71-300-STC, as a direct replacement for the original equipment manufacturer (OEM) NLG shock strut assembly.
De Havilland DHC-6-300, De Havilland DHC-6-200, De Havilland DHC-6-100, Viking DHC-6-400 STC holder: Team JAS |
| August 3, 2023 | Canary Islands operator swoops on hydrogen-electric power for seaplane |
| June 23, 2023 | DHC and Zimex put pen to paper for Twin Otter 300-G |
| June 19, 2023 | DHC launches economical 'Classic' Twin Otter |
| June 7, 2023 | Winair welcomes DHC-300 with Garmin 950 |
| December 28, 2022 | Twin Otter order puts Island Aviation on resort service |
| October 25, 2022 | Aerodynamic upgrades and maintenance support grow Ampaire stable |
| October 21, 2022 | AEVEX offers performance enhancements for 400 series Twin Otter |
| September 26, 2022 | DHC makes Alberta manufacturing move |
| June 16, 2022 | Powertrain deal brings H-electric thrust to Monte turboprop lease offer |
| February 8, 2022 | Viking Air rebrands within consolidation of LAC companies |
| December 7, 2021 | Genesys delivers over 1,000 S-TEC 3100 autopilots |
| November 18, 2021 | European operators select SkyTrac SDL-350 Certus |
| November 5, 2021 | Next generation exhaust gains STC for Twin Otter |
| August 9, 2021 | Viking and PAL prepare to deploy Twin Otter firefighters |
| May 10, 2021 | StandardAero has got Air Seychelles Twin Otters covered |
| March 22, 2021 | Ampaire builds stellar team to deliver electric flight |
| January 6, 2021 | BAS won’t be on thin ice thanks to Centrik |
| August 17, 2020 | Twin Otters supported for Peruvian Amazon ops |
| April 13, 2020 | SAS offers safe transfers while teaming with Loganair |
| April 2, 2020 | Acorn receives Transport Canada go-ahead for Otter exhaust |
| March 23, 2020 | De Havilland and Viking manufacturing shuts down |
| February 23, 2020 | Seaplane delivery brings Trans Maldivian fleet to 57 |
| February 17, 2020 | Twin Otter passes milestone for Viking |
| February 5, 2020 | Canada adds aircraft to marine surveillance programme |
| December 16, 2019 | Optical option broadens scope of the Guardian |
| December 1, 2019 | Twin Otter pair commence Chad operations for Avmax |
| November 10, 2019 | Trans Maldivian opts for rust-busting door handles |
| September 30, 2019 | Viking and Unity combine Twin Otter know-how |
| August 25, 2019 | Rampart receives first commuter category DHC-6-300HG |
| July 16, 2019 | Airplus certifies wi-fi for Twin Otters |
| June 24, 2019 | Maldivian engines enjoy StandardAero support |
| June 18, 2019 | Viking endorses SAJF for all its turboprops |
| April 23, 2019 | EASA certifies Twin Otter MTOW upgrade |
| February 27, 2019 | Maldivian integrates entire fleet with eMRO solution |
| January 28, 2019 | Pacific Sky Aviation chooses Fox Training Management System |
| April 12, 2018 | EASA-approved sim delivers Twin Otter training |
| August 24, 2017 | Air Seychelles introduces scenic charter flights |
| November 9, 2016 | Caverton signs another Twin Otter for oil contract |
| September 23, 2015 | RN-Aircraft signs with Viking for ten Twin Otters |
| July 7, 2015 | Viking names Liftec as sales representative |
| February 12, 2015 | Viking signs Veling Tayara as Middle East rep |
| July 10, 2013 | Vityaz Avia's Twin Otters to serve remote Russia |
| April 10, 2012 | Twin Otter seaplane service suits Turkey's coastal terrain |
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