Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Willow, Alaska 99688
Wednesday, July 18, 2001 14:30 AKD
NTSB Narrative Summary Released at Completion of Accident
The certificated airline transport pilot, with two passengers aboard, was conducting an aerial timber survey. While in cruise flight about 1,000 feet above the ground, the engine began to backfire, run rough, and lose power. The engine then quit, and the pilot selected a gravel bar along a glacial fed river as an emergency landing area. During the emergency approach to landing, the airplane landed short of the intended landing site, touched down in about 3 feet of water, and nosed over. After recovery, an FAA airworthiness inspector examined the airplane. The inspector reported that the number seven cylinder was cracked, the number nine cylinder had no compression, and that about one cup of clear water was found within the carburetor float bowl. The inspector said that he was unable to determine if the cylinder damage, or the presence of water in the carburetor was a result of impact damage with the river water. When the engine was disassembled the number nine cylinder head was found separated from the cylinder barrel.
NTSB Probable Cause Narrative
The loss of engine power during cruise due to the separation of an engine cylinder.
Event Information
| Type of Event | Accident |
| Event Date | 7/18/2001 |
| Event Day of the Week | Wednesday |
| Time of Event | 1430 |
| Event Time Zone | -- |
| Event City | Willow |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99688 |
| Event Date Year | 2001 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 614527N |
| Event Location Longitude | 1500310W |
| 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 | Full |
| 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) | 90 |
| Air Temperature at event time (in degrees celsius) | 10 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| 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 | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 3 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 11948 |
| NTSB Notification Source | ANC FAA, ROC |
| NTSB Notification Date | Jul 18 2001 12:00AM |
| NTSB Notification Time | 1430 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Jul 2 2002 4:28PM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Anchorage FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N9262Z |
| NTSB Number | ANC01TA087 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Public Use |
| Type of Flight Plan filed | Company VFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | de Havilland |
| Aircraft Model | DHC-2 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 1266 |
| Certified Max Gross Weight | 5300 |
| 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 | 6 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Jul 2 2001 12:00AM |
| Airframe hours since last inspection | 12.4 |
| Airframe Hours | 9549.5 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | USDA Forest Service |
| Aircraft Owner Street Address | 101 Airport Road |
| Aircraft Owner City | Palmer |
| Aircraft Owner State | AK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 99645 |
| Operator is an individual? | No |
| Operator Name | State of Alaska Dept. of Natural Resources |
| Operator Same as Owner? | No |
| 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) | Public Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | Z41 |
| Departure City | Lake Hood Strip |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | 1230 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | Z41 |
| Destination City | Lake Hood Strip |
| Destination State | AK |
| Destination Country | USA |
| Specific Phase of Flight | Cruise - normal |
| Report sent to ICAO? | Yes |
| Evacuation occurred | No |
| Date of most recent change to record | May 31 2002 7:30PM |
| 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 | -- |