What happened
During an approach to Runway 23 using the ILS, the flightcrew was operating in weather characterized by light snow, low visibility of 3/4 statute mile, and an overcast ceiling of 300 feet. Prior to the arrival, a preceding Hawker Jet had reported poor braking action on the runway, which was covered in a thin layer of snow. The pilot-in-imcommand had estimated that a dry runway would require 2,720 feet for a safe landing.
Upon touchdown, the aircraft had approximately 2,233 feet of the 5,101-foot runway remaining. The aircraft failed to stop within the available pavement, exiting the end of the runway and entering a grassy area. During the excursion, the nose landing gear assembly collapsed. There were 0 fatalities reported in this incident.
Findings
Investigation into the landing performance revealed that the estimated landing distance required for a dry runway under the prevailing conditions was approximately 2,750 feet, according to the aircraft's Pilot's Operating Manual. However, the crew lacked the necessary charts within the FAA-approved Airplane Flight Manual to calculate a revised landing distance for a contaminated runway.
At the time of the accident, wind conditions were recorded at 330 degrees with 12-knot sustained winds and gusts up to 22 knots. While regulations for transport category airplanes required landing distance determinations for level, smooth, dry, and hard-surfaced runways, there were no specific requirements for manufacturers to provide distance calculations for wet or contaminated surfaces.