ATL83FA091

NTSB accident investigation · Mooney M-20A · Prattville, AL · January 29, 1983

Accident · FatalField investigationFinal report
Date
January 29, 1983, 12:58 local (18:58 UTC)
Place
Prattville, AL
Injuries
4 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N8146EMooney M-20A
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Safety recommendations
Yes
FAA report
19830129001609A
Case key
5886

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/malfunctionManeuvering
Low pass - performedPilot in command
Wing,spar - deterioratedCause
Wing,spar - failure,totalCause
Maintenance,major repair - improperOther personCause
Maintenance,annual inspection - inadequateOther maintenance personnelFactor
Wing,spar - separation
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The left wing separated as the plt began a pull-up after a low pass. The separation point was in the wing root where themain spar had been secured to the fuselage with a metal bracket. A butt splice had been made to the bottom of the wing spar. The fracture area at the root end of the main wing spar was soft, damp & discolored compared to other wood in the area. The butt joint was later determined as having no capability for transferring axial stresses. This repair was not done under supervision of a licensed mechanic. The acft had operated 40 hrs since the annual inspection dated 6/8/82. AD76-15-1 (inspection of the wood wing) requires that the wood wing be inspected iaw Mooney sb M20-170A.

Aircraft

Registration
N8146E
Reported as
Mooney M-20A
Category
Airplane
Serial number
1417
Airframe hours
2,352
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
William Laine Hobbie II
Registered owner
Aloft Aerial Applicators Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 8, 1982 · 40 hours before
Departed
Auburn, AL
Airport
1A9 · Autauga Conty

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
21
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
281 total · 15 in this make and model · 227 as pilot in command · 35 in the last 90 days · 15 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 10 knots
Visibility
6 statute miles
Lowest ceiling
5,000 ft broken
Temperature
63 °F, dew point 48 °F
Altimeter
30.00 inHg
Observed at
MGM, 10 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.