Robinson R22 Beta II — Checklist

This document is an AAIB (Air Accidents Investigation Branch) bulletin detailing an investigation into an incident involving the Robinson R22 Beta helicopter, registration G-BYHE. The bulletin provides a comprehensive analysis of the flight, the pilot's actions, and the mechanical aspects of the helicopter that contributed to a significant accident. It is intended for pilots, maintenance personnel, and aviation safety professionals to understand the factors leading to the incident and to improve safety protocols. The document includes detailed descriptions of the helicopter's systems, operational procedures, and the investigation's findings regarding the mechanical failure and pilot error that resulted in the tail boom detaching during flight.

• The Robinson R22 Beta is powered by a Lycoming O-320-B2C piston engine.
• The collective pitch control lever is 38 cm long and 2.5 cm in diameter.
• The governor maintains engine RPM at 104% when the collective is raised.
• The tail rotor drive shaft is approximately 1 inch in diameter and is housed within the tail boom.
• The investigation identified pilot error and mechanical failure as contributing factors to the accident.