Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Bethel, Alaska 99559
Thursday, May 25, 1995 10:00 AKD
NTSB Narrative Summary Released at Completion of Accident
THE COMMERCIAL PILOT DEPARTED ON AN AIR TAXI CARGO FLIGHT TO A REMOTE DESTINATION. ABOUT 20 MINUTES AFTER TAKEOFF, THE ENGINE SUDDENLY QUIT, AND THE PILOT PERFORMED AN EMERGENCY LANDING ON ROUGH TERRAIN IN A STREAM BED. AFTER RECOVERY OF THE AIRPLANE 5 MONTHS LATER, AN EXAMINATION OF THE ENGINE REVEALED THAT THE #2 MAIN BEARING HAD FAILED AND THE CRANKSHAFT HAD FRACTURED THROUGH THE CRANK CHEEK BETWEEN THE #2 ROD AND #2 MAIN BEARING JOURNALS. THE #2 MAIN BEARING WAS SEVERELY FRAGMENTED AND DEFORMED, AND THE NUMBER 2 MAIN BEARING SADDLE WAS SEVERELY DEFORMED. A METALLURGICAL EXAMINATION OF THE CRANKSHAFT INDICATED THAT IT HAD FAILED FROM FATIGUE. THE EXAMINATION ALSO DISCLOSED THAT THE CRANKSHAFT CONFORMED TO THE MANUFACTURER'S MATERIAL SPECIFICATIONS FOR HARDNESS AND NITRIDING. RECORDS SHOWED THE ENGINE HAD BEEN REBUILT BY THE MANUFACTURER ON 7/23/92 AND INSTALLED IN THE AIRPLANE ON 9/3/92. AFTER BEING REBUILT, IT HAD ACCUMULATED 1154 HOURS OF FLIGHT TIME. AT 1004 HOURS, THE OIL PUMP HAD BEEN SERVICED DUE TO LOW OIL PRESSURE. DURING A 100 HOUR INSPECTION AT 1140 HOURS, METAL WAS FOUND IN THE OIL FILTER AND THE #4 CYLINDER WAS CHANGED.
NTSB Probable Cause Narrative
A FAILURE OF THE #2 MAIN ENGINE BEARING AND SUBSEQUENT FATIGUE FAILURE OF THE ENGINE CRANKSHAFT. A FACTOR RELATING TO THE ACCIDENT WAS: THE LACK OF SUITABLE TERRAIN FOR AN EMERGENCY LANDING.
Event Information
| Type of Event | Accident |
| Event Date | 5/25/1995 |
| Event Day of the Week | Thursday |
| Time of Event | 1000 |
| Event Time Zone | -- |
| Event City | BETHEL |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99559 |
| Event Date Year | 1995 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| 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 | Not pertinent |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 700 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 5 |
| Air Temperature at event time (in degrees celsius) | 6 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 170 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 12 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1163 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 25 1995 12:00AM |
| NTSB Notification Time | 955 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 7 2000 4:15PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N19BR |
| NTSB Number | ANC95LA058 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | Company VFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | CESSNA |
| Aircraft Model | 206 |
| Aircraft Series Identifier | 206 |
| Aircraft Serial Number | U206002992 |
| Certified Max Gross Weight | 3600 |
| 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 | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | May 9 1995 12:00AM |
| Airframe hours since last inspection | 14 |
| Airframe Hours | 6615 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | ARCTIC AIR GROUP |
| Aircraft Owner Street Address | P.O. BOX 190228 |
| Aircraft Owner City | ANCHORAGE |
| Aircraft Owner State | AK |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 99519 |
| Operator is an individual? | -- |
| Operator Name | ARCTIC CIRCLE AIR SERVICE INC. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. BOX 60049 |
| Operator City | FAIRBANKS |
| Operator State | AK |
| Operator Country | |
| Operator Zip code | 99706 |
| Operator Code | ACSA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | BET |
| Departure City | |
| Departure State | AK |
| Departure Country | |
| Departure Time | 940 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | VAK |
| Destination City | CHEVAK |
| Destination State | AK |
| Destination Country | |
| Specific Phase of Flight | Emergency landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:34AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |