Casualties unknown

1999-02-12: Beech 1900C (N31240) — Alaska Central Express, Inc. — Saint Mary's, AK

Saint Mary's, AK, US

On February 12, 1999, a Beech 1900C (registration N31240) operated by Alaska Central Express, Inc. was involved in an aviation accident near Saint Mary's, AK. Investigators recorded the probable cause as: The pilot's descent below the minimum descent altitude on the instrument approach. Factors were pilot fatigue resulting from the pilot's rest period being interrupted by scheduling discussions and the night weather conditions of low ceilings and whiteout. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 9 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards
Aircraft registered N31240
Aircraft registered N31240. Photo: Pete Macklin / CC BY-SA 2.0, via Wikimedia Commons

An airline transport pilot, cleared for a localizer approach, impacted snow-covered terrain 3.2 nautical miles from the runway threshold at night in instrument meteorological conditions. The pilot reported waking up in snow after descending to the minimum descent altitude.

Accident Summary

The accident occurred during a localizer approach to an airport. The airline transport pilot was cleared for the approach. The airplane impacted the ground 3.2 nautical miles from the runway threshold. The minimum descent altitude (MDA) for the approach was 560 feet msl, which is 263 feet above touchdown. Night, instrument meteorological conditions prevailed. The surrounding terrain was flat, snow-covered, and featureless. The reported weather was 200 feet overcast, 1 1/2 miles visibility in snow, and winds of 12 knots, gusting to 32 knots.

Pilot Report

The pilot reported that he was established on the final approach course and was descending to the MDA. He then stated that he woke up in the snow. He said he did not remember any problems with the airplane.

Aircraft and Airport Information

No preaccident mechanical anomalies were discovered with the airplane during the investigation. The airplane was not equipped with an autopilot. The airport has high intensity runway lights, sequenced flashing lead-in lights, and visual approach slope indicator lights. All airport lights and navigation aids were functioning.

Flight Crew Information

The pilot held an airline transport pilot certificate. The report refers to the pilot as a captain. The captain has the option of requesting a copilot, but the captain's pay is reduced by a portion equal to one-half the copilot's pay. The pilot had returned from the previous night's trip at 0725. He had three rest periods since his previous night's flight: four hours, two hours, and five hours 15 minutes. Each rest period was interrupted by contact with the company.

Regulatory Aspects

The company indicated that it is the pilot's responsibility to tell the company if duty times are being exceeded. Title 14 CFR 135.267 states, in part: "(d) Each assignment ... must provide for at least 10 consecutive hours of rest during the 24 hours that precedes the planned completion of the assignment."

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001205X00118. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.