ATL89FA163

NTSB accident investigation · Cessna 172F · Vernon, AL · June 17, 1989

Accident · FatalField investigationFinal report
Date
June 17, 1989, 17:30 local (22:30 UTC)
Place
Vernon, AL
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N7939UCessna 172F
Weather
Visual (VMC) · Day
Status
Completed · report June 22, 1992
Report
Approved by Office Director
FAA report
19890617015959A
Case key
7898

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

Improper maintenance of the spark plugs by the pilot/mechanic which resulted in a partial loss of engine power, and the pilot's failure to clear trees during an emergency landing in an open field resulting in an inadvertent 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 engine power(partial) - mech failure/malfCruise
Fluid,fuel grade - improper
Ignition system,spark plug - overtemperatureCause
Maintenance - inadequatePilot in commandCause
Ignition system,spark plug - failure,totalCause
Engine assembly,valve,exhaust - movement restrictedCause
Engine assembly,cylinder - low compressionCause
Forced landingApproach - vfr pattern - final approach
In flight collision with terrain/waterApproach - vfr pattern - final approach
Terrain condition - high obstruction(s)Factor
Clearance - misjudgedPilot in commandCause
Stall - inadvertentPilot in command

Aircraft

Registration
N7939U
Reported as
Cessna 172F
Category
Airplane
Serial number
17251939
Airframe hours
2,209
Engine
Continental O-300-D, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robinson, Hurskin C.
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Annual · November 3, 1983 · 44 hours before
Departed
M55 · Vernon, AL

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
64
Certificate
Private
Airplane ratings
Single-engine land
Medical
Expired
Seat
Left
Toxicology
Performed
Flight hours
236 total

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 4 knots
Visibility
9 statute miles
Lowest ceiling
25,000 ft overcast
Temperature
84 °F, dew point 61 °F
Altimeter
30.00 inHg
Observed at
CBM, 19 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.