Illustrative image; it may differ from the actual aircraft.

De Havilland Canada Dash 8-400 (DHC-8-402)

OS-a4dd02Unknown

RegistrationUSN412QX

Verified aircraft dataagainst the official civil aviation register

OperatorHorizon Air

0operators

1incidents

1accidents

2logbook years

0photos

De Havilland Canada Dash 8-400 (DHC-8-402) in Toronto.

Vuelopedia is a work in progress: it currently holds about 30% of the information we expect to have by the third quarter of 2027. Although we use only official, highly reliable sources, some aircraft data and history may still contain errors or inaccuracies. We work hard to clear every anomaly from the records using specialized verification tools.

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Technical data

ManufacturerBombardier

Engines2×

PropulsionTurboprop

Built inToronto, Canadá

Country of registrationEstados Unidos

OwnerAlaska Airlines

MSN4059

Hex / ICAO 24-bita4dd02

VerificationIdentity verified against the official register of FAA (United States) · Oct 8, 2026

The model · De Havilland Canada Dash 8

Figures for the Dash 8 Q400 variant, the most representative of the family

Length32.8 m108 ft

Wingspan28.4 m93 ft

Height8.3 m27 ft

Range1,596 km862 NMWith a typical passenger load

Cruise speed667 km/h360 ktMach 0.63

Service ceiling7,620 m25,000 ft

Maximum take-off weight29,574 kg65,199 lb

Maximum payload11,689 kg25,770 lbIts 82 passengers with baggage would weigh about 8.2 t; the rest is fuel and cargo

Typical capacity82 passengersUp to 90 in a high-density layout

Endurance2 h 24 minAt cruise speed, non-stop

With its 1,596 km range, from Seattle it could fly non-stop as far as:

LAXLos Angeles1,537 km

Beyond its rangeDFWDallas-Fort Worth2,668 km

The type first flew in 1983 (43 years ago) · About 1,250 units built · Production ended in 2022

Figures for the type, not for this particular aircraft: each variant and each configuration changes something. They are shown in both systems used in aviation.

The full story of the De Havilland Canada Dash 8 Compare this aircraft

Airports

Where this aircraft has operated, by period · source BTS (EE. UU.)

2021–2022Horizon Air · 2 years

Main base

SEASeattle2 years

Also flew to

PDXPortland GEGSpokane BOIBoise MFRMedford PSCPasco/Kennewick/Richland BLIBellingham RDMBend/Redmond EUGEugene MSOMissoula RNOReno BILBillings GTFGreat Falls BZNBozeman ALWWalla Walla PUWPullman YKMYakima FCAKalispell

Flight logbook

Year-by-year activity · source BTS (EE. UU.)

2022

Horizon Air · 1,175 flights during the year · base Seattle (SEA)

Main route of the year: Seattle (SEA) → Portland (PDX)

2021

Horizon Air · 1,709 flights during the year · base Seattle (SEA)

Main route of the year: Spokane (GEG) → Seattle (SEA)

Aircraft chronology

Nov 19, 2017

Accident at Sacramento

On November 19, 2017, the DHC-8 402 aircraft (registration N412QX), operated by Horizon Air, was involved in an accident at Sacramento. Source: the FAA (United States).

Source: FAA

Dec 29, 2017

Incident at Pullman, Washington

On December 29, 2017, the Bombardier Inc Dhc 8 402 aircraft (registration N412QX), operated by Horizon Air, was involved in an incident at Pullman, Washington (United States) due to a taxiway excursion. Source: the NTSB (United States).

What happened

Horizon Air flight 2184 landed by mistake on a taxiway parallel to runway 6 at Pullman/Moscow Regional Airport, Washington, a field with no control tower. The runway lights were not working — the cable pits had flooded from heavy rain and snow — and there was no NOTAM warning of it; the parallel taxiway lights, by contrast, were on. About 7 km from the threshold, having called the runway in sight, the captain disconnected the autopilot; he looked down to check the gear and, on looking up, saw only blackness until he made out a lit pavement, and slipped the aircraft to line up with it believing it was the runway. The taxiway and the runway are barely 60 metres apart, so a small correction was enough to end up over the wrong surface. The crew realised they were over the taxiway only in the flare, on touching the pavement. Source: the NTSB (United States).

Source: NTSB

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This page was last updated on October 11, 2026

APA

Vuelopedia. (2026, October 11). De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air. Retrieved October 23, 2026, from https://vuelopedia.org/en/aircraft/OS-a4dd02

MLA

“De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air.” Vuelopedia, Fundación Poderia, 11 Oct. 2026, vuelopedia.org/en/aircraft/OS-a4dd02. Accessed 23 Oct. 2026.

Chicago

Vuelopedia. “De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air.” Fundación Poderia. Last modified October 11, 2026. https://vuelopedia.org/en/aircraft/OS-a4dd02.

Harvard

Vuelopedia (2026) De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air. Available at: https://vuelopedia.org/en/aircraft/OS-a4dd02 (Accessed: 23 October 2026).

BibTeX

@misc{vuelopedia_en_aircraft_os_a4dd02,
  author       = {{Vuelopedia}},
  title        = {{De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air}},
  publisher    = {Fundación Poderia},
  year         = {2026},
  date         = {2026-10-11},
  url          = {https://vuelopedia.org/en/aircraft/OS-a4dd02},
  howpublished = {\url{https://vuelopedia.org/en/aircraft/OS-a4dd02}},
  urldate      = {2026-10-23},
  note         = {Accessed 2026-10-23}
}

Wikipedia

{{cite web |url=https://vuelopedia.org/en/aircraft/OS-a4dd02 |title=De Havilland Canada Dash 8-400 (DHC-8-402) · N412QX · Horizon Air |website=Vuelopedia |publisher=Fundación Poderia |date=2026-10-11 |access-date=2026-10-23 |language=en}}