Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Mazama, Washington 98833
Thursday, April 17, 2003 PDT
NTSB Narrative Summary Released at Completion of Accident
The aircraft had been missing for four months when the wreckage was spotted by a helicopter pilot engaged in firefighting operations. The wreckage was located on the east wall of a north/south running valley at the 5,000 foot level. On site documentation of the wreckage indicated that the aircraft was traveling in a northerly direction when it collided with several trees before impacting the steep mountainous terrain. No evidence of a mechanical failure or malfunction was indicated. At the time of the accident, low clouds and mountain obscuration were in the area. Two pilot's flying in the area north of the departure airport had observed a twin engine aircraft flying in a northerly direction between 200 to 500 feet above ground level. Data extracted from the on board GPS unit indicated that the destination may have been to an airport in Canada. The last coordinates and altitude matched the accident site location and elevation. The last recorded speed was 197 knots. No flight plan had been filed nor was there evidence of a weather briefing from flight services. Family members were unable to verify the purpose of the flight or its destination.
NTSB Probable Cause Narrative
The pilot's failure to maintain clearance from terrain while maneuvering. Mountainous terrain, trees and mountain obscuration were factors.
Event Information
| Type of Event | Accident |
| Event Date | 4/17/2003 |
| Event Day of the Week | Thursday |
| Time of Event | -- |
| Event Time Zone | Pacific Daylight Time |
| Event City | Mazama |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 98833 |
| Event Date Year | 2003 |
| Event Date Month | 4 |
| MidAir Collision Indicator | -- |
| On Ground Collision occurred ? | -- |
| Event Location Latitude | 484759N |
| Event Location Longitude | 1203359W |
| 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 | Unknown |
| Investigator's weather source | Unknown |
| 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 | -- |
| Sky Condition for Lowest Ceiling | -- |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | -- |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| 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) | 15395 |
| NTSB Notification Source | FAA ROC |
| NTSB Notification Date | Aug 8 2003 12:00AM |
| NTSB Notification Time | 1500 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Apr 28 2004 3:34PM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | -- |
| FAA District Office | Spokane, Washington |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4178T |
| NTSB Number | SEA03FA165 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 320D |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 320D0078 |
| Certified Max Gross Weight | 5200 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Sep 11 1997 12:00AM |
| Airframe hours since last inspection | 431 |
| Airframe Hours | 4125 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | David E. Nichols |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Vallejo |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 94589 |
| 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 | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | EAT |
| Departure City | Wenatchee |
| Departure State | WA |
| Departure Country | USA |
| Departure Time | 745 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | AD5 |
| Destination City | Merritt, BC |
| Destination State | -- |
| Destination Country | USA |
| Specific Phase of Flight | Maneuvering |
| Report sent to ICAO? | Yes |
| Evacuation occurred | No |
| Date of most recent change to record | Feb 18 2004 12:55PM |
| User who most recently changed record | STAM |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | -- |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |