DFW08CA171

NTSB accident investigation · Mooney M20 · Lake Ft Gibson, OK · June 29, 2008

Accident · Minor injuriesData collectionFinal report
Date
June 29, 2008, 17:15 local (22:15 UTC)
Place
Lake Ft Gibson, OK
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N1287XMooney M20
Defining event
Maneuvering: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report September 26, 2008
Report
Approved by Office Director
Parties
FAA FSDO
Case key
68343

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 loss of control while maneuvering the aircraft.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotMooney M20E: 16 casesAll aircraft: 9,295 casesProbable cause
Terrain: waterEnvironmental issues › Physical environment · Not specifiedMooney M20E: 1 caseAll aircraft: 97 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot, with one passenger on-board the airplane, was to practice maneuvers with the airplane. The pilot performed "lazy 8's, circles around-a-point, S-turns, and low-flight." While doing slow flight at full power and flaps deployed, the aircraft's right wing dropped; the pilot tried to correct the problem by lowering the nose and applying aileron and rudder. However, the pilot reported that the aircraft started to spin, and oscillate left-to-right. The pilot was not able to fully recover the aircraft before impacting the surface of a lake. Both the passenger and pilot were able to open the aircraft's door and exit the craft.

Factual narrative

The pilot, with one passenger on-board the airplane, was to practice maneuvers with the airplane. The pilot performed "lazy 8's, circles around-a-point, S-turns, and low-flight." While doing slow flight at full power and flaps deployed, the aircraft's right wing dropped; the pilot tried to correct the problem by lowering the nose and applying aileron and rudder. However, the pilot reported that the aircraft started to spin, and oscillate left-to-right. The pilot was not able to fully recover the aircraft before impacting the surface of a lake. Both the passenger and pilot were able to open the aircraft's door and exit the craft.

Aircraft

Registration
N1287X
Reported as
Mooney M20
Category
Airplane
Serial number
160
Airframe hours
2,942
Engine
Lycoming IO-360, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 1, 2007
Departed
H73 · Tahlequah, OK

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
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
November 1, 2007
Seat
Left
Flight hours
357 total · 271 in this make and model · 87 in the last 90 days · 26 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 64 °F
Altimeter
30.11 inHg
Observed at
KTQH

Other investigations on N1287X · 2

Matched to the same aircraft by N-number and date.