MKC87LA096

NTSB accident investigation · Rotorway Executive · Gerald, MO · April 28, 1987

Accident · No injuriesLimited investigationFinal report
Date
April 28, 1987, 13:30 local (18:30 UTC)
Place
Gerald, MO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N4891HRotorway Executive
Weather
Visual (VMC) · Day
Status
Completed · report May 27, 1988
Report
Approved by Office Director
FAA report
19870428012719A
Case key
34375

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

On this page

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.

Loss of engine power(total) - mech failure/malfCruise - normal
Ignition system - looseCause
Engine assembly - disabledFactor
Forced landingDescent - emergency
Autorotation - performedPilot in command
In flight collision with terrain/waterDescent - emergency
Rotor rpm - not maintainedPilot in commandFactor
Remedial action - delayedPilot in commandFactor
Level off - improperPilot in commandCause
Terrain condition - uphill

Analysis

The stu PIC was solo on a x-country flt when the eng backfired. The stu entered autorotation with low rotor RPM which accelerated the descent rate. The stu flared before touchdown but did not level the helo in time to land. The tailboom struck the gnd and the helo rotated on its side. The stu stated that the lndg site he had chosen consisted of sloping terrain. The stu stated that he flared and the tailboom struck the upsloping terrain. The stu stated that had he leveled off at the appropriate time he probably would have been successful. The eng insp revealed that the eng timing belt had slipped, effectively disabling the eng.

Aircraft

Registration
N4891H
Reported as
Rotorway Executive
Category
Helicopter, amateur-built
Serial number
3078
Airframe hours
106
Engine
Rotorway RW-145, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Harvey J. Jacquin
Airworthiness certificate
Special, Experimental (Special)
Departed
Washington, MO
Destination
Bland, MO

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
53
Certificate
Student
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
106 total · 106 in this make and model · 10 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 6 knots, gusting 20
Visibility
10 statute miles
Temperature
70 °F, dew point 36 °F
Altimeter
30.00 inHg
Observed at
STL, 51 nm away

FAA reports on this event · 1

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