No fatalities

Helicopter Involved in Pinnacle Landing Attempt on Mountain Peak

Philomath, OR, United States

On June 17, 2008, a Robinson R-22 Beta operated by Hillsboro Aviation Inc. was involved in an aviation accident near Philomath, OR. No fatalities were reported. Investigators recorded the probable cause as: The student pilot's failure to maintain rotor rpm during a pinnacle approach and the flight instructor's delayed remedial action and inadequate supervision of the flight. Contributing to the accident was the downdraft weather condition. This summary draws on records from NTSB; 5 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1785761257Data APIEditorial standards

A flight instructor and student sustained minor injuries after their helicopter impacted terrain during a pinnacle landing attempt to a 4,060-foot mountain, following a downdraft encounter.

Incident Overview

A flight instructor and a student pilot were conducting an instructional cross-country flight. They stopped for fuel at an airport with an elevation of 250 feet and were returning to their home base. Upon departure, the wind was reported from 300 degrees at 16 knots, gusting to 20 knots.

Pinnacle Landing Attempt

The flight crew decided to perform a pinnacle landing to a 4,060-foot mountain. As the student pilot approached the peak for landing, a downdraft was encountered. The main rotor disk low rpm indicators activated, prompting the flight instructor to take control of the helicopter in an attempt to salvage the situation.

Impact and Egress

During the maneuver, the helicopter's landing skid impacted the terrain, causing the aircraft to roll twice down the mountain. Both the flight instructor and the student pilot exited the helicopter with minor injuries.

Contributing factors

Causes

Prop/rotor parameters — Not attained/maintainedInstructor/check pilot

Other contributing factors

Contributed to outcomeMountainous/hilly terrain