Casualties unknown

2003-12-23: Beech 58P (N181AM) — U.s. Forest Service — Missoula, MT

Missoula, MT, US

On December 23, 2003, a Beech 58P (registration N181AM) operated by U.s. Forest Service was involved in an aviation accident near Missoula, MT. Investigators recorded the probable cause as: The second pilot's failure to maintain terrain clearance while maneuvering after takeoff. Proper climb rate not verified by the flight crew, fog, freezing fog, dark night conditions and inadequate supervision by the pilot-in-command were factors. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 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

During a night departure in instrument meteorological conditions, the flying pilot (inexperienced in type) felt a thump during a right turn, bank angle increased, and the aircraft entered a descent, impacting terrain. No mechanical failure was found.

Incident Summary

Shortly after takeoff in night instrument meteorological conditions, the second pilot, who had no previous flight time in that make and model of aircraft and was serving as the flying pilot, initiated a right turn from runway heading at an altitude of about 400 to 500 feet above ground level. The maneuver was intended to intercept the outbound radial from the VOR to follow the departure procedure. During the turn, the flight crew felt a "thump," and the right bank angle increased from approximately 25 degrees to 45 degrees. While the second pilot attempted to correct the increasing bank, the aircraft entered a descent at some point.

Pilot Actions

Just before ground impact, which occurred in open terrain approximately one mile south of the runway, the pilot-in-command took control of the aircraft in an effort to level the wings. The aircraft then skipped across the open terrain for several hundred yards before coming to rest on its belly. The aircraft was subsequently consumed by fire. Neither pilot could explain the loss of altitude; both believed they were in a continuous climb during the event, as airspeed and pitch attitude remained constant. Neither pilot recalled scanning the vertical speed indicator or altimeter to verify whether they were indicating a climb or descent.

Post-Accident Findings

During the post-accident inspection of the aircraft, no evidence of a mechanical failure or malfunction was found, and no evidence of an in-flight collision with an object was noted. At the time of the accident, low freezing fog and reduced visibility were reported.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20031224X02087. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.