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Accident description
Last updated: 21 October 2017
Status:Final
Date:Tuesday 17 August 2004
Time:23:40
Type:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft 99 Airliner
Operator:Alpine Aviation
Registration: N199GL
C/n / msn: U-15
First flight: 1968
Total airframe hrs:40521
Engines: 2 Pratt & Whitney Canada PT6A-27
Crew:Fatalities: 1 / Occupants: 1
Passengers:Fatalities: 1 / Occupants: 1
Total:Fatalities: 2 / Occupants: 2
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:11 km (6.9 mls) NE of Neihart, MT (   United States of America)
Crash site elevation: 2767 m (9078 feet) amsl
Phase: En route (ENR)
Nature:Cargo
Departure airport:Billings-Logan International Airport, MT (BIL/KBIL), United States of America
Destination airport:Kalispell-Glacier National Park Airport, MT (FCA/KFCA), United States of America
Flightnumber:5071
Narrative:
The airplane departed Billings at 23:05 carrying 2,665 pounds of mail on behalf of the U.S. Postal Service to Kalispell.
The airplane flew into the southern slope of Mt. Baldy in the middle of a large skree field approximately 150 feet below the summit, at an altitude of 9,079 feet amsl (2767 m).

Probable Cause:

PROBABLE CAUSE: "The pilot's failure to maintain adequate terrain clearance during cruise, which resulted in the in-flight collision with mountainous terrain. Dark night conditions and mountainous terrain were contributing factors."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 2 months
Accident number: SEA04FA166
Download report: Summary report

Classification:
Controlled Flight Into Terrain (CFIT) - Mountain

Sources:
» NTSB id. SEA04FA166


Photos

photo of Beechcraft 99 N199GL
N199GL was leased to Alpine Air in in October 1990 and ultimatly bought by the airline in December 2003
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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 Billings-Logan International Airport, MT to Kalispell-Glacier National Park Airport, MT as the crow flies is 511 km (319 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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