Saturday, March 23, 2019

Cessna 180H, N95EA: Accident occurred September 02, 2018 near Yakutat Seaplane Base (2Y3), Alaska

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Juneau, Alaska

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


https://registry.faa.gov/N95EA


Location: Yakutat, AK
Accident Number: GAA18CA572
Date & Time: 09/02/2018, 1330 AKD
Registration: N95EA
Aircraft: Cessna 180
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal 

Analysis 

The pilot reported that, while on step during takeoff from an ocean bay and as she turned the float-equipped airplane into the wind, the left wing and float raised. The right wing impacted the water, and the airplane pivoted about 90° clockwise before coming to rest partially submerged on its left side.

The airplane sustained substantial damage to both wings.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

A video of the takeoff taken from the shore showed the airplane making a sweeping left turn on the step. Wind indications in the video showed the wind coming from the airplane's left. The left turn tightens as the airplane turns into the wind, the left wing and float lift, and the right wing then strikes the water.

The automated weather observation system about 4 nautical miles from the accident site reported that, about the time of the accident, the wind was from 330° at 8 knots. The pilot was departing to the northwest.

The pilot reported that the wind at the accident site was light and variable at 0 to 5 knots.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain lateral control of the airplane during a step-turn takeoff.

Findings

Aircraft
Lateral/bank control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Factual Information

History of Flight

Takeoff
Loss of control on ground (Defining event)
Collision with terr/obj (non-CFIT)

Pilot Information


Certificate: Airline Transport; Flight Instructor; Commercial
Age: 53, Female
Airplane Rating(s): Multi-engine Land; Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): Airplane Multi-engine; Airplane Single-engine; Instrument Airplane
Toxicology Performed: No
Medical Certification: Class 1 With Waivers/Limitations
Last FAA Medical Exam: 06/09/2017
Occupational Pilot: Yes
Last Flight Review or Equivalent: 05/17/2017
Flight Time:  (Estimated) 16000 hours (Total, all aircraft), 300 hours (Total, this make and model), 10000 hours (Pilot In Command, all aircraft), 15 hours (Last 90 days, all aircraft), 12 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information


Aircraft Make: Cessna
Registration: N95EA
Model/Series: 180 H
Aircraft Category: Airplane
Year of Manufacture: 1969
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 18052052
Landing Gear Type: Float
Seats: 2
Date/Type of Last Inspection: 04/01/2018, Annual
Certified Max Gross Wt.: 2950 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 6978 Hours at time of accident
Engine Manufacturer: Continental
ELT: C126 installed, not activated
Engine Model/Series: O-470R
Registered Owner: Michael L. Cozad Trustee
Rated Power: 230 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: PAYA, 31 ft msl
Distance from Accident Site: 4 Nautical Miles
Observation Time: 2153 UTC
Direction from Accident Site: 147°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling:None 
Visibility (RVR):
Wind Speed/Gusts: 8 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 330°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.98 inches Hg
Temperature/Dew Point: 17°C / 11°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Yakutat, AK (2Y3)
Type of Flight Plan Filed: VFR
Destination: Cordova, AK (CKU)
Type of Clearance: Unknown
Departure Time: 1330 AKD
Type of Airspace: Class E

Airport Information

Airport: Yakutat (2Y3)
Runway Surface Type: Water
Airport Elevation: 0 ft
Runway Surface Condition: Water--calm
Runway Used: NW
IFR Approach: None
Runway Length/Width:  7500 ft / 2000 ft
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 59.566111, -139.740833 (est) 

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