Background
The flight was originally scheduled to pick up passengers and cargo. However, a landing gear problem forced the dispatch of another aircraft carrying a mechanic. The second aircraft returned with the passengers, while the mechanic repaired the accident aircraft. The accident aircraft later departed with only the cargo on board.
Accident
The aircraft was not operating under a flight plan. Instrument meteorological conditions were reported from 7,000 to 12,500 feet above mean sea level by the other company aircraft. The wreckage was located on the side of Mount Torbert at the 10,570-foot level.
Personnel and Equipment
The pilot-in-command was found in the right pilot seat with a non-aviation related book in his lap. The mechanic was found in the left pilot seat with a world aeronautical chart and a CD-11 open on his lap. The mechanic held a commercial pilot certificate but no instrument rating.
Investigation Findings
The investigation revealed weaknesses in company operations. Official findings identified several factors: mountainous and hilly terrain, snow-covered terrain, whiteout conditions, an attempted VFR flight into IMC by the copilot/second pilot, failure to follow procedures by the pilot in command, and insufficient standards and requirements on the part of company management.