ASN Wikibase Occurrence # 370455
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| Date: | Friday 1 March 2002 |
| Time: | 20:40 LT |
| Type: |  Bombardier DHC-8-402Q Dash 8 |
| Owner/operator: | Horizon Airlines |
| Registration: | N410QX |
| MSN: | 4053 |
| Total airframe hrs: | 726 hours |
| Engine model: | P&W PW150A |
| Fatalities: | Fatalities: 0 / Occupants: 73 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Boise, ID -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Seattle/Tacoma International Airport, WA (SEA/KSEA) |
| Boise Airport, ID (BOI/KBOI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Probable Cause: 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.
Accident investigation:
 |
|
Sources:
NTSB SEA02IA044
History of this aircraft
Other occurrences involving this aircraft
| 25 April 2014 | N410QX | Horizon Airlines | 0 | Near Seattle–Tacoma International Airport | |
min |
| Bird strike | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2024 10:54 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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