Pilot Proceeds Into Known IFR Conditions Over Rocky Mountains

Casualties unknown • Alma, CO, US

A pilot ignored weather advisories regarding obscured mountain tops and poor visibility, choosing to fly into known instrument meteorological conditions over high terrain in the Rockies.

What happened

The pilot was transporting his brother and sister-in-law on a flight intended to attend their mother's funeral. Prior to departure, the pilot obtained a weather briefing during which he was explicitly advised that visual flight rules (VFR) operations were not recommended for the planned route.

Despite these warnings, the pilot requested specific weather reports for a southerly route. He was informed that mountain tops along this path were obscured and that conditions were deteriorating. When presented with the forecast indicating ceilings below 1,000 feet and visibility less than 3 miles in snow and fog across the Rocky Mountains, the pilot indicated he would attempt to proceed, hoping the weather might clear sufficiently to allow passage.

Subsequently, the aircraft crashed on the side of Mount Democrat, a peak standing at 14,286 feet. The impact occurred at an altitude of approximately 13,800 feet. Evidence at the site indicated that the aircraft struck the terrain in near-level flight, suggesting a loss of spatial orientation or controlled flight into terrain due to weather conditions.

The investigation

Investigators examined the wreckage and the surrounding terrain to determine the sequence of events leading to the accident. There was no evidence of pre-impact mechanical failure or malfunction that would have contributed to the crash. The area forecast had explicitly warned that mountains and higher terrain were occasionally obscured in clouds and precipitation, with ceilings and visibility frequently dropping below VFR minimums.

Findings

The pilot elected to continue the flight into known adverse weather conditions despite receiving specific advisories against VFR flight. The decision to proceed into an environment with obscured mountain tops and low ceilings resulted in the aircraft impacting high terrain. The area forecast had clearly indicated that visibility could drop below 3 miles and ceilings below 1,000 feet in the region.

Safety message

Pilots must respect weather briefings and avoid VFR flight into known instrument meteorological conditions, particularly in mountainous terrain where visual references are easily lost.

Probable cause

The pilot's decision to continue visual flight into adverse weather conditions despite being advised that VFR flight was not recommended, resulting in controlled flight into terrain.

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Frequently asked questions

What happened in the 1983-12-14 Piper PA-32 accident near Alma, CO?

A pilot ignored weather advisories regarding obscured mountain tops and poor visibility, choosing to fly into known instrument meteorological conditions over high terrain in the Rockies.

What aircraft was involved and where did it happen?

The accident on 1983-12-14 involved a Piper PA-32, registration N47403, at Alma, CO.

What was the probable cause of the accident?

The pilot's decision to continue visual flight into adverse weather conditions despite being advised that VFR flight was not recommended, resulting in controlled flight into terrain.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X45265. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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