Accident description
Last updated: 20 April 2014
Status:Final
Date:Tuesday 26 December 1989
Time:22:30 PST
Type:British Aerospace 3101 Jetstream 31
Operating for:United Express
Leased from:North Pacific Airlines - NPA
Registration: N410UE
C/n / msn: 776
First flight: 1987
Total airframe hrs:4972
Cycles:7168
Engines: 2 Garrett TPE331-10UG-514H
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 4 / Occupants: 4
Total:Fatalities: 6 / Occupants: 6
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:Pasco-Tri-Cities Airport, WA (PSC) (   United States of America) show on map
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Yakima Air Terminal, WA (YKM/KYKM), United States of America
Destination airport:Pasco-Tri-Cities Airport, WA (PSC), United States of America
Flightnumber:2415
Narrative:
United Express Flight 2415 took off from Seattle for a flight to Pasco via Yakima. While flying into Yakima, the flight encountered icing conditions. After landing, the first officer (together with a deadheading pilot) knocked ice of the wings. The NPA station agent at Yakima asked the captain if he wanted to deice the aircraft, or just the tail plane, since both pilots just removed the ice from the wings. The captain declined both offers.
The aircraft took off again at 22.03 using runway 27. Since Pasco tower was closing at 22:30, Seattle Center cleared the flight for an ILS runway 21R approach. At 22:30 the aircraft was observed descending fast from a higher than normal altitude. The aircraft suddenly nosed over and crashed short of the runway.


PROBABLE CAUSE: "The flight crew's decision to continue an unstabilized instrument landing system approach that led to a stall, most likely of the horizontal stabilizer, and loss of control at low altitude. Contributing to the accident was the air traffic controller's improper vectors that positioned the airplane inside the outer marker while it was still well above the glide slope. Contributing to the stall and loss of control was the accumulation of airframe ice that degraded the aerodynamic performance of the airplane."

Events:


Sources:
» NTSB Safety Recommendations A-94-70 through -72
» Ian Churchill
» NTSB Safety Recommendations A-92-59 through -65
» NTSB/AAR-91/06

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - USA
report status: Final
report number: NTSB/AAR-91-06
report released:04-NOV-1991
duration of investigation:678 days (1 year 10.4 months)
download report: Unstabilized Approach and Loss of Controll NPA, Inc. dba United Express Flight 2415 British Aerospace BA-3101, N410UE, Tri-Cities Airport Pasco, Washington December 26, 1989. (NTSB/AAR-91-06)
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Follow-up / safety actions

NTSB issued 7 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Yakima Air Terminal, WA to Pasco-Tri-Cities Airport, WA as the crow flies is 114 km (71 miles).

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