Individually Owned: 150,657
Corporate Owned: 137,281
Fairbanks International Airport
Aircraft Accident/Incident Report
Fairbanks, Alaska 99709
Monday, May 7, 2001 19:56 AKD
NTSB Narrative Summary Released at Completion of Accident
The commercial certificated pilot/flight instructor was conducting a local area instructional flight with the student pilot/owner of the airplane. The flight instructor reported that he was doing wheel landings with the student to a gravel runway. During the touch down on the third or fourth landing, the tailwheel assembly suddenly broke off. An FAA airworthiness inspector examined the airplane after the accident and found a preexisting crack in the tailwheel spring assembly that was about 1/16 inch deep, and about 1/2 inch long. The spring failed at the crack. When the tail wheel departed the airplane, it struck the bottom of the rudder, and the rudder trim tab. The bottom and aft portion of the rudder assembly was torn open. The spring assembly had accrued 126 hours, and 65 hours since the last annual inspection.
NTSB Probable Cause Narrative
A failure of the tailwheel spring assembly due to fatigue during touch and go landings. A factor in the accident was an inadequate annual inspection by maintenance personnel.
Event Information
| Type of Event | Accident |
| Event Date | 5/7/2001 |
| Event Day of the Week | Monday |
| Time of Event | 1956 |
| Event Time Zone | -- |
| Event City | FAIRBANKS |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99709 |
| Event Date Year | 2001 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 644849N |
| Event Location Longitude | 1475135W |
| Event Location Airport | FAIRBANKS INTERNATIONAL |
| Event Location Nearest Airport ID | PAFA |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 434 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1953 Atlantic Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | PAFA |
| Elevation of weather observation facility | 434 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | ADT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 5500 |
| Lowest Non-Ceiling Height | 4000 |
| Sky/Lowest/Cloud Conditions | Few |
| 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) | 7 |
| Dew Point at event time (in degress fahrenheit) | -1 |
| Wind Direction (degrees magnetic) | 184 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.64 |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 11397 |
| NTSB Notification Source | FAA REGIONAL OPERTIONS CENTER |
| NTSB Notification Date | May 8 2001 12:00AM |
| NTSB Notification Time | 730 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Feb 20 2002 1:46PM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | AL-FAI-FSDO-01 |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N3143A |
| NTSB Number | ANC01LA055 |
| 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 | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 170B |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 25787 |
| Certified Max Gross Weight | 2200 |
| 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 | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Nov 6 2000 12:00AM |
| Airframe hours since last inspection | 65 |
| Airframe Hours | 4904 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | CORDELL T. GRAY |
| Aircraft Owner Street Address | 2105 FLIGHT STREET |
| Aircraft Owner City | NORTH POLE |
| Aircraft Owner State | AK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 99075 |
| 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) | Instructional |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | PAFA |
| Departure City | FAIRBANKS |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | 1917 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Landing - flare/touchdown |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Jan 18 2002 3:47PM |
| User who most recently changed record | STAM |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 19 |
| Runway Length | 3980 |
| Runway Width | 75 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |