Aviation Accident Summaries

Aviation Accident Summary LAX92LA109

ROSAMOND, CA, USA

Aircraft #1

N169RM

85 MANISTA KB-2

Analysis

DURING A LOCAL AREA FLIGHT THE PILOT WAS OBSERVED CIRCLING OVER A RESIDENTIAL AREA AT A LOW ALTITUDE. THE PILOT INITIATED AN ABRUPT TURNING MANEUVER WHILE CHANGING THE EXPERIMENTAL GYROPLANE'S PITCH ATTITUDE. ROTOR RPM DECREASED AND THE BLADES BEGAN EXCESSIVELY FLAPPING. THE BLADES COLLIDED WITH AND SEVERED THE RUDDER AND PROPELLER. THEREAFTER, THE GYROPLANE NOSED DOWN AND DESCENDED (UNCONTROLLED) INTO A CITY STREET.

Probable Cause and Findings

THE PILOT'S FAILURE TO MAINTAIN MAIN ROTOR RPM ADEQUATE TO AVOID FLAPPING. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE RELATED TO THE PILOT'S PERFORMANCE OF AN EXCESSIVELY ABRUPT MANEUVER.

 

Source: NTSB Aviation Accident Database

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