Sunday, June 17, 2018

Improper Decision to Takeoff with Known Structural Issue: Taylor Coot Amphibian, N100TN, accident occurred June 06, 2018 in Malone, Fond du Lac County, Wisconsin

Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; Milwaukee, Wisconsin 

Aviation Accident Final Report - National Transportation Safety Board:  https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

Aviation Accident Data Summary - National Transportation Safety Board:  https://app.ntsb.gov/pdf

http://registry.faa.gov/N100TN

Location: Malone, WI
Accident Number: GAA18CA329
Date & Time: 06/06/2018, 1900 CDT
Registration: N100TN
Aircraft: DOBBS GEORGE COOT
Aircraft Damage: Substantial
Defining Event: Miscellaneous/other
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis 

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. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's improper decision to take off with a known structural issue, which resulted in hull damage. 

Findings

Aircraft
Fuselage main structure - Fatigue/wear/corrosion (Cause)

Personnel issues
Decision making/judgment - Pilot (Cause)

Factual Information

History of Flight

Takeoff
Miscellaneous/other (Defining event)
Aircraft structural failure

Pilot Information

Certificate: Private
Age: 61, Male
Airplane Rating(s): Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: None
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: BasicMed
Last FAA Medical Exam: 08/04/2017
Occupational Pilot: No
Last Flight Review or Equivalent: 03/23/2017
Flight Time:   (Estimated) 905.9 hours (Total, all aircraft), 12.9 hours (Total, this make and model), 905.9 hours (Pilot In Command, all aircraft), 12 hours (Last 90 days, all aircraft), 6 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: DOBBS GEORGE
Registration: N100TN
Model/Series: COOT A
Aircraft Category: Airplane
Year of Manufacture: 1980
Amateur Built: Yes
Airworthiness Certificate: Experimental
Serial Number: SS22
Landing Gear Type: Retractable - Amphibian; Tricycle
Seats: 2
Date/Type of Last Inspection: 10/25/2017, Condition
Certified Max Gross Wt.: 2300 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 538 Hours as of last inspection
Engine Manufacturer: Lycoming
ELT: Installed, not activated
Engine Model/Series: O-320-A2B
Registered Owner: On file
Rated Power: 150 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KFLD, 807 ft msl
Distance from Accident Site: 17 Nautical Miles
Observation Time: 2353 UTC
Direction from Accident Site: 187°
Lowest Cloud Condition: Clear
Visibility: 10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 4 knots /
Turbulence Type Forecast/Actual: / None
Wind Direction: 250°
Turbulence Severity Forecast/Actual: / N/A
Altimeter Setting: 29.87 inches Hg
Temperature/Dew Point: 22°C / 13°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Malone, WI
Type of Flight Plan Filed: None
Destination: Cheboygan, MI
Type of Clearance: None
Departure Time: 1910 CDT
Type of Airspace: Class G

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 44.047500, -88.440278 (est)

FOND DU LAC - A man is uninjured after his plane crashed into shallow water in Lake Winnebago Wednesday night.

Just after 7 p.m., the Fond du Lac County Sheriff's department was called to a report of a plane partially submerged in the lake about a quarter mile off the shore of Velvet Beach Road, the sheriff's department said.

Upon arrival deputies said they found a 1980 Coot Amphibian plane submerged in about three-feet of water just west of N10664 Pukwana Beach Road.

According to the pilot, Glenn Moore of Elkhart Lake, during his take off one of the plane's sponsons began to take on water. As he continued take off, one of the sponsons eventually tore off, causing the plane to take on more water and eventually sink.

Moore was able to get the attention of boaters in the area and was eventually towed back to shore safely, the sheriff's department said.

The crash remains under investigation by the sheriff’s office and the Federal Aviation Administration. 

Original article can be here: https://www.fdlreporter.com

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