FTW90FA093

NTSB accident investigation · Mooney M-20J · Inola, OK · April 10, 1990

Accident · FatalField investigationFinal report
Date
April 9, 1990, 20:40 local (Apr 10, 1990, 01:40 UTC)
Place
Inola, OK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N526LMooney M-20J
Weather
Instrument (IMC) · Night/dark
Status
Completed · report September 21, 1992
Report
Approved by Office Director
FAA report
19900409007909A
Case key
23017

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 decision to conduct the flight into known adverse weather and his inability to maintain control of the airplane due to spatial disorientation. Factors were the dark night conditions and thunderstorms.

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.

In flight encounter with weatherCruise
Light condition - dark nightFactor
Weather forecast - not obtainedPilot in command
Weather condition - thunderstormFactor
Flight into known adverse weather - performedPilot in commandCause
Lack of total instrument timePilot in command
Loss of control - in flightManeuvering - turn to reverse direction
Aircraft control - not maintainedPilot in commandCause
Spatial disorientationPilot in commandCause
In flight collision with objectManeuvering - turn to reverse direction
Object - tree(s)
Object - fence
Object - fence post
Object - wire,transmission
In flight collision with terrain/waterManeuvering - turn to reverse direction

Analysis

The non-instrument rated pilot had just completed a night instrument flight lesson and elected to fly his airplane home. His flight instructor tried to get him to drive home but he said no, he could make it. The exact wx conditions he encountered could not be determined but the area was under a severe thunderstorm warning at the time. There were no records to show the pilot contacted any commercial or government weather service. The airplane was in a high speed, descending left turn, toward the direction of the departure airport, when it impacted a tree, a fence and fence post, a high voltage power line, and the ground. All of the wreckage was found along the wreckage path. No pre-impact problems could be found with the airplane, engine, or related components. The flight instructor said the airplane departed in VFR conditions. He also said that everything was operational on the airplane when they finished their instrument flight lesson.

Aircraft

Registration
N526L
Reported as
Mooney M-20J
Category
Airplane
Serial number
24-1382
Airframe hours
1,226
Engine
Lycoming IO-360-A3B6D, 200 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Robert A. Johnston
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 2, 1990
Departed
TUL · Tulsa, OK
Destination
Wagoner, OK
Airport
NONE

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
39
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
354 total · 299 as pilot in command · 28 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
160° at 12 knots
Visibility
7 statute miles
Lowest ceiling
900 ft overcast
Temperature
63 °F, dew point 61 °F
Altimeter
29.00 inHg
Observed at
TUL, 30 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.