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NTSB Report
June 7, 2018 · Dobbs George COOT A · N100TN
Malone, WI
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 7, 2018
Injury Outcomes
No injuries (1 uninjured)
Location
Malone, WI
Aircraft
Dobbs George COOT A (1980)
Tail Number
N100TN
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA18CA329
According to the pilot in the experimental amateur-built amphibious airplane, during takeoff from a lake, the airplane bounced twice, but on the third bounce, the hull "gave way." Water entered the airplane, and the pilot exited through the canopy. The pilot reported that the hull had been repaired previously, but it still had "some leakage" after the repair. Substantial damage was sustained to the forward left side of the hull where the sponson was attached. Photographs provided by the Federal Aviation Administration showed long-term water damage to the plywood and fiberglass hull structure.
NTSB Probable Cause
The pilot’s improper decision to take off with a known structural issue, which resulted in hull damage.
Full Narrative
According to the pilot in the experimental amateur-built amphibious airplane, during takeoff on a lake the airplane bounced twice, but on the third bounce the hull "gave way." The airplane took on water and the pilot exited through the canopy. The hull failure occurred to the front left side where the sponson was attached. The pilot reported that the hull had been repaired previously, but it still had "some leakage" after the repair. Substantial damage was sustained to the forward left side of the hull. Photographs provided by the FAA showed long-term water damage to the plywood and fiberglass hull structure.
Flight
Event TypeAccident
Event Time19:00 CDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDobbs George COOT A
Tail NumberN100TN
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-A2B · Reciprocating · 150
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 61 · Basc · None
Conditions
ConditionsVMC
LightDaylight
Wind250° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point55
Altimeter29.87 inHg
Observation Time23:53
Weather SourceWFAC