Pierre - Rapid City

The airplane was on an instrument flight rules flight in night instrument meteorological conditions when the accident occurred. The airplane had been cleared for an ILS approach and the pilot elected to use a non-published procedure to intercept the final approach. After becoming established on the final approach, the airplane impacted the ground about 7 miles from the destination airport at an elevation approximately the same as the airport elevation. Flight inspections of the instrument approach performed prior to and subsequent to the accident revealed satisfactory performance of both the localizer and glideslope functions. The number one altimeter setting did not match the altimeter setting that was current at the time of the accident. Post accident examination of the altimeters revealed that the number one altimeter read 360 feet high. No determination was made as to whether the discrepancy existed prior to impact. However, the pilot did not report any pre-flight discrepancies with regard to the airplane's altimeters. No other anomalies were found or reported with regard to the airplane's structure or systems.

Flight / Schedule

Pierre - Rapid City

Registration

N99TH

MSN

U-155

Year of Manufacture

1974

Operator

Alpine Air

Date

December 29, 2006 at 02:00 AM

Type

CRASH

Flight Type

Cargo

Flight Phase

Landing (descent or approach)

Crash Site

Plain, Valley

Crash Location

Rapid City South Dakota

Region

North America • United States of America

Coordinates

44.0806°, -103.2280°

Crash Cause

Human factor

Narrative Report

On December 29, 2006 at 02:00 AM, Pierre - Rapid City experienced a crash involving Beechcraft 99 Airliner, operated by Alpine Air, with the event recorded near Rapid City South Dakota.

The flight was categorized as cargo and the reported phase was landing (descent or approach) at a plain, valley crash site.

1 people were known to be on board, 0 fatalities were recorded, 1 survivors were identified or estimated. This corresponds to an estimated fatality rate of 0.0%.

Crew on board: 1, crew fatalities: 0, passengers on board: 0, passenger fatalities: 0, other fatalities: 0.

The listed crash cause is human factor. The airplane was on an instrument flight rules flight in night instrument meteorological conditions when the accident occurred. The airplane had been cleared for an ILS approach and the pilot elected to use a non-published procedure to intercept the final approach. After becoming established on the final approach, the airplane impacted the ground about 7 miles from the destination airport at an elevation approximately the same as the airport elevation. Flight inspections of the instrument approach performed prior to and subsequent to the accident revealed satisfactory performance of both the localizer and glideslope functions. The number one altimeter setting did not match the altimeter setting that was current at the time of the accident. Post accident examination of the altimeters revealed that the number one altimeter read 360 feet high. No determination was made as to whether the discrepancy existed prior to impact. However, the pilot did not report any pre-flight discrepancies with regard to the airplane's altimeters. No other anomalies were found or reported with regard to the airplane's structure or systems.

Aircraft reference details include registration N99TH, MSN U-155, year of manufacture 1974.

Geospatial coordinates for this crash are approximately 44.0806°, -103.2280°.

Fatalities

Total

0

Crew

0

Passengers

0

Other

0

Crash Summary

The airplane was on an instrument flight rules flight in night instrument meteorological conditions when the accident occurred. The airplane had been cleared for an ILS approach and the pilot elected to use a non-published procedure to intercept the final approach. After becoming established on the final approach, the airplane impacted the ground about 7 miles from the destination airport at an elevation approximately the same as the airport elevation. Flight inspections of the instrument approach performed prior to and subsequent to the accident revealed satisfactory performance of both the localizer and glideslope functions. The number one altimeter setting did not match the altimeter setting that was current at the time of the accident. Post accident examination of the altimeters revealed that the number one altimeter read 360 feet high. No determination was made as to whether the discrepancy existed prior to impact. However, the pilot did not report any pre-flight discrepancies with regard to the airplane's altimeters. No other anomalies were found or reported with regard to the airplane's structure or systems.

Cause: Human factor

Occupants & Outcome

Crew On Board

1

Passengers On Board

0

Estimated Survivors

1

Fatality Rate

0.0%

Known people on board: 1

Operational Details

Schedule / Flight

Pierre - Rapid City

Operator

Alpine Air

Flight Type

Cargo

Flight Phase

Landing (descent or approach)

Crash Site

Plain, Valley

Region / Country

North America • United States of America

Aircraft Details

Registration

N99TH

MSN

U-155

Year of Manufacture

1974

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