MKC83FU004

NTSB accident investigation · Mattison MAC 300 · Brewster, KS · July 6, 1983

Accident · Serious injuriesFinal report
Date
July 5, 1983, 19:15 local (Jul 6, 1983, 00:15 UTC)
Place
Brewster, KS
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
UNREGMattison MAC 300
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
33360

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 flightManeuvering
Flight control,rudder - disconnectedFactor
Aircraft preflight - improperPilot in commandCause
Rudder - not correctedPilot in commandCause
Stall/spin - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - cropFactor

Analysis

The ultralight went out of control and dove in a cockscrew spiral to the ground. The vehicle did not move after impact. The acft was at about 200 ft AGL when witnesses saw it dip the right wing and start a spin which was described as a corkscrew. It made 4 or 5 revolutions before hitting the ground. The sheriff took a picture which shows that the upper hinge clevis on the rudder post is not connected to the rudder support post. The pin is in the support post clevis. The vehicle was hangered in a shed that required the rudder be removed to hanger it. The pilot said he installed the rudder before the accident flt.

Aircraft

Registration
UNREG
Reported as
Mattison MAC 300
Category
Ultralight
Airframe hours
20
Engine
Kawasaki TA340A-F202, 30 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 103
Registered owner
Donald L. Hawkins, Sr.
Airport
5KSO · Hutton, runway 14, 4,000 × 200 ft, grass/turf

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
54
Airplane ratings
Single-engine land
Medical
Unknown
Seat
Center
Flight hours
330 total · 20 in this make and model · 290 as pilot in command · 20 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
81 °F