Bombardier DHC-8-401 N410QX

Summary

On 2 March 2002 at about 01:40 local time, a Bombardier DHC-8-401 registered N410QX, operated by Horizon Airlines, was involved in an incident near Boise, Idaho, United States. 73 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

2 March 2002 at 01:40

Classification

Incident

Location

Boise, Idaho, United States

Coordinates

Not recorded

Aircraft

Bombardier DHC-8-401

Registration

N410QX

Category

Airplane

Engines

2

Operator

Horizon Airlines

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Seattle → Boise

Aircraft damage

Not recorded

Weather

VMC

Light

Day

NTSB number

SEA02IA044

Nobody was injured.

The partial failure of one of the number two hydraulic system elevator hydraulic lines, leading to the loss of fluid and pressure in that system during cruise flight. This loss resulted in reliance upon the sole remaining activation system (number one hydraulic) to operate the rudder.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

During en route cruise, there was a failure of a number two system elevator hydraulic line. This resulted in a loss of hydraulic fluid and loss of pressurization in the number two system. The loss of this system resulted in the rudder being dependent upon the sole remaining activation system (hydraulic system number one) for its operation. After the landing gear was lowered manually, the aircraft landed without further incident, but because the loss of the number two system rendered the nose wheel steering inoperative, the aircraft had to be towed from the runway. The reason for the failure of the hydraulic line could not be positively determined.

Quoted verbatim from the NTSB record.