MKC89GA147

NTSB accident investigation · Maule MX-7 · Atlantic, IA · June 30, 1989

Accident · FatalFinal report
Date
June 30, 1989, 17:44 local (22:44 UTC)
Place
Atlantic, IA
Injuries
2 fatal
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6131MMaule MX-7
Weather
Visual (VMC) · Day
Status
Completed · report September 5, 1990
Report
Approved by Office Director
Case key
34700

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

Failure of the pilot to maintain adequate airspeed, while maneuvering at low altitude, which led to an inadvertent stall and loss of control. A contributing factor was the lack of altitude to recover from a stall.

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 - turn to reverse direction
Maneuver - initiatedPilot in command
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Altitude - inadequatePilot in commandFactor

Analysis

The public use acft was being used by the Iowa state highway patrol to search for a missing person. Ground searchers in the area rprtd the acft was flying at an altitude of about 100 to 150 ft AGL, when it was observed to enter a steep bank, apchg 90 deg. The turn was made to circle back & keep sight of someone believed to be the missing person. While turning, the acft suddenly entered a nose down attitude & impacted the ground. A post-acdnt inspn of the acft did not reveal any preimpact mechanical failures.

Aircraft

Registration
N6131M
Reported as
Maule MX-7
Category
Airplane
Serial number
11062C
Airframe hours
113
Engine
Lycoming O-360-C1F, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft · Public use
Registered owner
Iowa State Highway Patrol
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · June 5, 1989 · 42 hours before
Departed
AIO · Atlantic, 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
30
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
1,357 total · 64 in this make and model · 1,160 as pilot in command · 114 in the last 90 days · 24 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 5 knots
Visibility
15 statute miles
Lowest ceiling
8,000 ft broken
Temperature
90 °F
Altimeter
30.00 inHg