LAX92LA109

NTSB accident investigation · 85 Manista KB-2 · Rosamond, CA · February 4, 1992

Accident · FatalLimited investigationFinal report
Date
February 4, 1992, 14:45 local (22:45 UTC)
Place
Rosamond, CA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N169RM85 Manista KB-2
Weather
Visual (VMC) · Day
Status
Completed · report March 9, 1993
Report
Approved by Office Director
FAA report
19920204001819A
Case key
27551

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

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.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Abrupt maneuverManeuvering
Maneuver - abruptPilot in commandFactor
Maneuver - excessivePilot in commandFactor
Adequate rotor rpm - not maintainedPilot in commandCause
Airframe/component/system failure/malfunctionManeuvering
Flight control,rudder - separation
Propeller system/accessories,blade - separation
In flight collision with terrain/waterDescent - uncontrolled

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.

Aircraft

Registration
N169RM
Reported as
85 Manista KB-2
Category
Gyroplane, amateur-built
Serial number
L169844
Airframe hours
173
Engine
Mcculloch 4318A&E/0-100, 70 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Calvin C. Peterson
Registered owner
Robert R. Manista, Jr.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Unknown · January 2, 2000

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
66
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Toxicology
Performed
Flight hours
5,500 total · 38 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None
Temperature
61 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.