Individually Owned: 150,657
Corporate Owned: 137,281
Snohomish County Airport
Aircraft Accident/Incident Report
Everett, Washington 98204
Tuesady, June 26, 2007 14:40 PDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported that the takeoff on runway 34L seemed normal until he raised the flaps. The pilot then heard a "big bang [that] shook the entire airplane" and he noticed that the canopy had come unlatched. Concerned that the canopy could possibly depart the aircraft and damage the tail, the pilot declared an emergency and circled left to land on runway 11. The pilot aligned the aircraft with the runway, but the airplane's airspeed was excessive for a normal touchdown point. When the pilot realized that he was "too fast", he pulled the throttle to idle and pulled the mixture out to stop the engine. The aircraft did not touchdown until it reached the numbers at the departure end of the runway. During the landing roll, the aircraft rolled across taxiway Golf, runway 16L-34R, and taxiway Foxtrot. The aircraft continued to roll off the taxiway surface, through the airport perimeter fence and onto a public street, where it encountered uneven terrain and nosed over, coming to rest upside down.
NTSB Probable Cause Narrative
Excessive airspeed during a return for landing which resulted in an overrun. An unlatched canopy, a proper touchdown point not attained and rough terrain were factors.
Event Information
| Type of Event | Accident |
| Event Date | 6/26/2007 |
| Event Day of the Week | Tuesday |
| Time of Event | 1440 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Everett |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 98204 |
| Event Date Year | 2007 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 475437N |
| Event Location Longitude | 1221722W |
| Event Location Airport | Snohomish County Airport |
| Event Location Nearest Airport ID | PAE |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 606 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | -- |
| 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) | 21 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 350 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 22283 |
| NTSB Notification Source | FAA ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Oct 31 2007 7:09AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N3715 |
| NTSB Number | SEA07CA185 |
| 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 | Hammer |
| Aircraft Model | Thorp T-18 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 66 |
| Certified Max Gross Weight | 1440 |
| 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 | Fixed |
| Aircraft, Type of Last Inspection | Conditional |
| Date of Last Inspection | Apr 1 2007 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 251 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Robert Hammer |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Kirkland |
| Aircraft Owner State | WA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 98033 |
| Operator is an individual? | No |
| Operator Name | Robert Hammer |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | Kirkland |
| Operator State | WA |
| Operator Country | USA |
| 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 | Yes |
| Departure Airport Code | PAE |
| Departure City | Everett |
| Departure State | WA |
| Departure Country | USA |
| Departure Time | 1430 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | PAE |
| Destination City | Everett |
| Destination State | WA |
| Destination Country | USA |
| Specific Phase of Flight | Emergency landing after takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jul 23 2007 8:01PM |
| User who most recently changed record | STAM |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | 11 |
| Runway Length | 4500 |
| Runway Width | 75 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |