MKC82DA166

NTSB accident investigation · Scorpion 133 · Mondamin, IA · September 5, 1982

Accident · Minor injuriesFinal report
Date
September 5, 1982, 16:30 local (21:30 UTC)
Place
Mondamin, IA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N13420Scorpion 133
Weather
Visual (VMC) · Day
Status
Completed · report September 5, 1983
Report
Approved by Office Director
FAA report
19820905043789A
Case key
71746

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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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 control - in flightLanding - flare/touchdown
Rotorcraft flight control,collective control - incorrectCause
Maintenance,adjustment - improperOther maintenance personnelFactor
Condition(s)/step(s) insufficiently definedProduction/design personnelCause
Rotor rpm - not maintainedPilot in command
Hard landingLanding - flare/touchdown

Analysis

After a ground adjustment to the collective pitch on his homebuilt helicopter, the pilot tookoff to practice hovering takeoff and landing. In an attempt to hover close to ground, he raised the collective and the aircraft shot up about 30 feet. It then fell off to the left and impacted the ground a later discussion with factory representative disclosed a difference between verbal adjustment instructions and those on the published plans for building the aircraft.

Aircraft

Registration
N13420
Reported as
Scorpion 133
Category
Helicopter, amateur-built
Serial number
RW2958
Airframe hours
10
Engine
Rotorway RW145, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Gary Deitering
Registered owner
Gary Deitering
Departed
Mondamin, IA
Destination
Mondamin, IA

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
35
Certificate
Private
Medical
Class 3, Valid Medical--no waivers/lim.
Flight hours
73 total · 11 in this make and model · 41 as pilot in command · 11 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Temperature
167 °F

FAA reports on this event · 1

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