Bombardier CL-600-2C10 N609QX

Summary

On 11 April 2004 at about 20:25 local time, a Bombardier CL-600-2C10 registered N609QX, operated by Horizon Air, was involved in an incident near Denver, Colorado, United States. 60 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

11 April 2004 at 20:25

Classification

Incident

Location

Denver, Colorado, United States

Nearest airport

Denver International Airport (DEN)

Coordinates

39.8586, -104.6669

Aircraft

Bombardier CL-600-2C10

Registration

N609QX

Category

Airplane

Engines

2

Operator

Horizon Air

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Ontario → Denver

Aircraft damage

Not recorded

Weather

VMC

Light

Day

NTSB number

DEN04IA060

Nobody was injured.

The total failure of the airplane's number 1 system hydraulic pump.

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

Read the full NTSB narrative

The captain reported that while in cruise flight at flight level 330, the crew received a master caution light and a hydraulic system 1 low pressure along with warning lights for the outboard ground spoilers, outboard spoilerons, and the outboard spoilers. The hydraulic fluid quantity and fluid temperature readings were good, but the system pressure was dropping. The crew ran the emergency checklist and continued their flight to Denver, using the backup (1B) system. On final approach and landing, the captain reported that they lost number 1 system pressure and quantity. The crew shut off the 1B system and continued to land. After landing, the crew shut down the number one engine and taxied to the gate. A post-incident examination of the airplane's number 1 hydraulic system showed that the hydraulic pump had come apart internally and seized. Metal fragments were found in the hydraulic filters and lines. Further examination of the hydraulic pump showed that several piston shoes in the pump's hanger and piston subassembly had come apart. The resulting metal fragments subsequently caused damage to the hold-down plate, the hanger, and other internal components of the pump, resulting in its seizure.

Quoted verbatim from the NTSB record.