ATL89LA064

NTSB accident investigation · Mooney M20F · Perdido, AL · December 30, 1988

Accident · No injuriesLimited investigationFinal report
Date
December 30, 1988, 12:45 local (17:45 UTC)
Place
Perdido, AL
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N6969VMooney M20F
Weather
Visual (VMC) · Day
Status
Completed · report January 4, 1990
Report
Approved by Office Director
FAA report
19881230057119A
Case key
7973

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.

Airframe/component/system failure/malfunctionDescent - normal
Maintenance,major repair - improperOther maintenance personnelFactor
Propeller system/accessories,prop blade retention - fatigueCause
Propeller system/accessories - separation
Fluid,oil - leak
Forced landingDescent - emergency
Window,flight compartment window/windshield - contaminationFactor
In flight collision with terrain/waterLanding - flare/touchdown
Visual lookout - reduced
Object - tree(s)

Analysis

While descending to 6000 feet the pilot experienced a complete loss of engine oil supply. The windscreen was covered with oil and the pilot had to use the side window to gain forward visibility. After completing the emergency landing check the engine seized. An emergency landing area was selected. The airplane collided with a tree about 10 feet above the ground. The airplane continued about 200 feet before coming to a stop in an upright position. The post crash examination indicated that the propeller assembly had separated from the engine propeller shaft. The fracture analysis of the bolts disclosed that four bolts failed in fatigue. The propeller was overhauled about 12 hours before the mishap. The overhaul facility reused the old bolts after magna-flux and plating. The installation torque was not determined.

Aircraft

Registration
N6969V
Reported as
Mooney M20F
Category
Airplane
Serial number
22-1336
Airframe hours
1,271
Engine
Lycoming I0-360-A1A, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Thomas W. Mitchell
Registered owner
Thomas W Mitchell
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 23, 1989 · 119 hours before
Departed
ISM · Kissimmee, FL
Destination
PIB · Hattiesburg, MS
Flight plan
IFR

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
37
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
382 total · 27 in this make and model · 277 as pilot in command · 22 in the last 90 days · 16 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
150° at 10 knots
Visibility
7 statute miles
Lowest ceiling
1,200 ft broken
Temperature
72 °F, dew point 66 °F
Observed at
PNS, 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.