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DE HAVILLAND CANADA DHC-6

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DHC6
Aircraft
Name DHC-6
Manufacturer DE HAVILLAND CANADA
Body Narrow
Wing Fixed Wing
Position High wing (wing struts)
Tail Regular tail, high set
WTC Light
APC A
Type code L2T
Aerodrome Reference Code 1B
Engine Turboprop
Engine count Multi
Position (Front) Wing leading mounted
Landing gear Tricycle fixed
Mass group 2


Manufacturered as:

DE HAVILLAND CANADA Twin Otter
DE HAVILLAND CANADA CC-138 Twin Otter
DE HAVILLAND CANADA UV-18 Twin Otter
DE HAVILLAND CANADA DHC-6 Twin Otter
SCENIC DHC-6 Vistaliner
SCENIC Vistaliner


DE HAVILLAND CANADA DHC-6

DE HAVILLAND CANADA DHC-6 DE HAVILLAND CANADA DHC-6 3D

Description

STOL turboprop airliner and utility transport aircraft. In service since 1966 (-200 since 1968, -300 since 1969). Fixed undercariage. DE HAVILLAND CANADAs most successful commercial design. DHC-6-200 with extended nose and DHC-6-300 with more powerful engines. Production ceased in 1988. DHC-6-300: Length 15,77 m MTOW 5,670kg12,500.21 lbs
5.67 tonnes
. Production of a new series of the aircraft (400) started in 2007.

Technical Data

Wing span 19.8 m64.961 ft
Length 15.1 m49.541 ft
Height 5.9 m19.357 ft
Powerplant Series:
  • 100: 2 x 578 SHP P&W PT6A-20 turboprops with 3 blade propellers.
  • 200: 2 x 652 SHP P&W PT6A-27 turboprops with 3 blade propellers.
  • 300: 2 x 652 SHP P&W PT6A-27 turboprops with 3 blade propellers.
  • 400: 2 x 750 SHP P&W PT6A-34 turboprops with 3 blade propellers.
Engine model Pratt & Whitney Canada PT6

Performance Data

Take-Off Initial Climb
(to 5000 ft)
Initial Climb
(to FL150)
Initial Climb
(to FL240)
MACH Climb Cruise Initial Descent
(to FL240)
Descent
(to FL100)
Descent (FL100
& below)
Approach
V2 (IAS) 80 kts IAS 110 kts IAS 130 kts IAS 130 kts MACH TAS 180 kts MACH IAS 160 kts IAS 130 kts Vapp (IAS) 70 kts
Distance 500 m ROC 1000 ft/min ROC 500 ft/min ROC 500 ft/min ROC ft/min MACH ROD ft/min ROD 1000 ft/min MCS kts Distance 300 m
MTOW 56705,670 kg
5.67 tonnes
kg
Ceiling FL260 ROD 800 ft/min APC A
WTC L Range 900900 nm
1,666,800 m
1,666.8 km
5,468,503.941 ft
NM

Accidents & Serious Incidents involving DHC6

  • DHC6 / E145, Glasgow UK, 2006 (On 29 August 2006, a Loganair DHC-6 began to taxi onto an intersecting active runway at Glasgow just an Embraer 145 was about to touch down on it but after a late sighting had reverse taxied clear so that there was no actual collision risk. It was found that the incursion had been contrary to the accepted ATC clearance and indirectly attributable to distraction. It was also noted that TWR controllers did not have an adequate understanding of the installed RIMCAS system with the result that the inappropriate mode set had not provided an alert at the point of incursion.)
  • DHC6, Dabra Indonesia, 2011 (On 17 October 2011, the pilot of a Merpati DHC6 attempting to land at Dabra on a scheduled passenger flight lost control of the aircraft when several bounces were followed by the aircraft leaving the runway and hitting some banana trees before re entering the runway whereupon a ground loop was made near the end of the runway to prevent an overrun onto unfavourable terrain. The aircraft was damaged but none of the occupants were injured. The mis-managed landing was attributed to an unstabilised approach.)
  • DHC6, Jomson Nepal, 2013 (On 16 May 2013, a DHC6-300 on a domestic passenger flight made a tailwind touchdown at excessive speed in the opposite direction of the of 740 metre-long runway to the notified direction in use and, after departing the runway to one side during deceleration, re-entered the runway and attempted to take off. This failed and the aircraft breached the perimeter fence and fell into a river. The Investigation identified inappropriate actions of the aircraft commander in respect of both the initial landing and his response to the subsequent runway excursion and also cited the absence of effective CRM.)
  • DHC6, Tiree UK, 2017 (On 7 March 2017, a DHC-6-300 left the side of the runway after touchdown in what the crew believed was a crosswind component within the Operator's crosswind limit. The Investigation concluded that the temporary loss of control of the aircraft was consistent with the occurrence with a sudden gust of wind above the applicable crosswind limits and noted the reliance of the crew on 'spot' winds provided by TWR during the final stages of the approach.)
  • DHC6, en-route, Arghakhanchi Western Nepal, 2014 (On 16 February 2014 a Nepal Airlines DHC6 attempting a diversion on a VFR flight which had encountered adverse weather impacted terrain at an altitude of over 7000 feet in a mountainous area after intentionally entering cloud following a decision to divert due to weather incompatible with VFR. The aircraft was destroyed and all 18 occupants were killed. The Investigation attributed the accident to loss of situational awareness by the aircraft commander and inadequate crew co-operation in responding to the prevailing weather conditions.)
  • DHC6, en-route, Mount Elizabeth Antarctica, 2013 (On 23 January 2013, a Canadian-operated DHC6 on day VFR positioning flight in Antarctica was found to have impacted terrain under power and whilst climbing at around the maximum rate possible. The evidence assembled by the Investigation indicated that this probably occurred following entry into IMC at an altitude below that of terrain in the vicinity having earlier set course en route direct to the intended destination. The aircraft was destroyed and there were no survivors.)
  • DHC6, vicinity Kokoda Papua New Guinea, 2009 (On 11 August 2009, a De Havilland Canada DHC-6-300 being operated by Airlines PNG on a scheduled domestic passenger flight from Port Moresby to Kokoda impacted terrain in day IMC while transiting the Kokoda Gap, approximately 6nm south east of the intended destination. The aircraft was destroyed by impact forces and all 13 occupants were killed.)
  • DHC6, vicinity Oksibil Indonesia, 2009 (On 2 August 2009 a DHC-6 being operated by Merpati Nusantara Airlines on a scheduled domestic passenger flight from Sentani to Oksibil in West Papua in daylight and on a VFR Flight Plan was in collision with terrain 6nm from destination resulting in the destruction of the aircraft and the death of all 15 occupants.)
  • DHC6, vicinity Saint Barthelemy French Antilles, 2001 (On 24 March 2001, a De Havilland DHC-6, operated by Caraïbes Air Transport, lost control during a VFR approach to Saint Barthelemy airport in the French Antilles. On short final the aircraft took a sharp left turn which resulted in impact with the terrain.)