Individually Owned: 151,845
Corporate Owned: 143,699
Aircraft Accident/Incident Report
Hyak, Washington 98068
Tuesady, October 19, 2004 12:00 PDT
NTSB Narrative Summary Released at Completion of Accident
During the en route climb to cruise, the pilot was cleared to 17,000 feet by the controller. About one minute later, the pilot was given a clearance to proceed direct to his ultimate destination, and at that time he gave no indication of having encountered any problem. Then about five seconds after receiving the clearance, the pilot advised Center that he had a flight control problem. About ten seconds after that, he stated that he had an in-flight emergency, and about fifteen seconds after declaring the emergency, the pilot transmitted three times in a rapid excited voice that he was "out of control." The controller was not able to make any further radio contact with the aircraft, which soon thereafter descended into the terrain at a high rate of speed. The aircraft wreckage was not found for over eight months, and when located was determined to be in over 1,000 pieces over a distance of approximately one-half mile. Due to the extent of the disintegration of the aircraft, no determination could be made as to the exact flight control malfunction that had occurred.
NTSB Probable Cause Narrative
The loss of aircraft control during climb to cruise due to an undetermined flight control malfunction.
Event Information
| Type of Event | Accident |
| Event Date | 10/19/2004 |
| Event Day of the Week | Tuesday |
| Time of Event | 1200 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Hyak |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 98068 |
| Event Date Year | 2004 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 472265N |
| Event Location Longitude | 1211613W |
| 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 | 1153 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | 110 |
| Weather Observation Facility ID | KELN |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | 45 |
| Time Zone of the weather observation | PST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 8500 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 13 |
| Dew Point at event time (in degress fahrenheit) | 7 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.76 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 19280 |
| NTSB Notification Source | FAA Communications Center |
| NTSB Notification Date | Oct 19 2004 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Feb 28 2006 12:35PM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | Seattle FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N39TJ |
| NTSB Number | SEA05LA133 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Aero Vodochody Aero. Works |
| Aircraft Model | L-39C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 812041 |
| Certified Max Gross Weight | 10360 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| 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 | Conditional |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | 1950 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Rocky L. Stewart |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Livermore |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 94551 |
| 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 | KBFI |
| Departure City | Seattle |
| Departure State | WA |
| Departure Country | USA |
| Departure Time | 1146 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | KLWS |
| Destination City | Lewiston |
| Destination State | ID |
| Destination Country | USA |
| Specific Phase of Flight | Climb - to cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 13 2005 11:56AM |
| 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 | -- |