Aircraft Accident/Incident Report

Marysville, Washington 98271
Thursday, October 12, 2006 15:00 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot of the amphibious airplane said that he started the day by practicing seven water landings on a fresh water lake. He said he was flying back to his home base when he decided to do a landing in the brackish waters where two sloughs came together. He said the water landing went well, but when he continued with a high speed taxi, the aircraft nosed over. The pilot said that the front of the hull and the cockpit area were fractured and broken. The pilot said that he believes there was a strong tidal current in the area, and it contributed to the aircraft nosing over.

NTSB Probable Cause Narrative

The pilot's failure to identify an unsafe condition (strong tidal currents) prior to a water landing, which resulted in the airplane nosing over when the pilot was unable to maintain aircraft control.

Event Information

Type of Event Accident
Event Date 10/12/2006
Event Day of the Week Thursday
Time of Event 1500
Event Time Zone Pacific Daylight Time
Event City Marysville
Event State WASHINGTON
Event Country --
Zipcode of the event site 98271
Event Date Year 2006
Event Date Month 10
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 480203N
Event Location Longitude 1221124W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1453 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 190
Weather Observation Facility ID PAE
Elevation of weather observation facility 142
Distance of event from weather observation facility (units?) 11
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 18
Dew Point at event time (in degress fahrenheit) 7
Wind Direction (degrees magnetic) 330
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 5
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.93
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 21525
NTSB Notification Source FAA NW ROC
NTSB Notification Date Oct 12 2006 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record May 29 2007 12:24PM
User who most recently changed record NTSB\lema
Basic weather conditions Visual Meteorological Cond
FAA District Office Seattle, WA

Aircraft Involved

Aircraft #1

Aircraft Registration Number N9877S
NTSB Number SEA07LA011
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Sorensen
Aircraft Model Searey
Aircraft Series Identifier --
Aircraft Serial Number 1DK175
Certified Max Gross Weight 1370
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? Yes
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Continuous Airworthiness
Date of Last Inspection Feb 1 2006 12:00AM
Airframe hours since last inspection 35
Airframe Hours 35
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Gerald P. Sorensen
Aircraft Owner Street Address --
Aircraft Owner City Everett
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98205
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code AWO
Departure City Arlington
Departure State WA
Departure Country USA
Departure Time 900
Departure Time Zone PDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code --
Destination City Marysville
Destination State WA
Destination Country USA
Specific Phase of Flight Taxi
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Apr 16 2007 3:27PM
User who most recently changed record STAM
Since inspection or accident Time of Accident
Event Location Runway Number and Location NA
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --