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Aircraft Incidents and Accidents

Monday, April 1, 2002 3:00 PM EST
GAINESVILLE, GEORGIA 30501
LEE GILMER MEMORIAL AIRPORT

NTSB Probable Cause Narrative
A loss of engine power following a supercharger bearing failure and subsequent collision with the ground while maneuvering for an emergency landing.
NTSB Narrative Summary Released at Completion of Accident
The pilot and CFI were conducting a series of touch and go landings when smoke was seen streaming from the right lower section of the engine cowling after take off. Witnesses also reported hearing a rough engine condition. At approximately the same time, the pilot initiated a left turn towards the airport. The airplane was last seen in a nose low attitude. The airplane disappeared below the tree line and collided with the ground. Examination of the engine revealed damage throughout the supercharger assembly. The supercharge impeller was not totally secure on the impeller shaft. The impeller shaft retainer nut was loose on its shaft. This nut as well as the impeller shaft gear-teeth showed signs of wear. These teeth were worn down and disfigured. Both the aluminum cover plate and the bottom of the impeller blades showed signs of circular scraping. Small pieces of metal were found throughout the engine. Disassembly of the oil filter revealed metal shavings throughout. No metal parts or gear teeth were found in the oil sump.
Event Information
Type of EventAccident 
Event Date4/1/2002 
Event Day of the WeekMonday 
Time of Event1500 
Event Time ZoneEastern Standard Time 
Event CityGainesville 
Event StateGEORGIA 
Event Country-- 
Zipcode of the event site30501 
Event Date Year2002 
Event Date Month
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude341623N 
Event Location Longitude0834937W 
Event Location AirportLee Gilmer Memorial 
Event Location Nearest Airport IDGVL 
Indicates whether the acc/inc occurred off or on an airportOff Airport/Airstrip 
Distance from airport in statute miles
Degrees magnetic from airport200 
Airport Elevation1275 
Weather Briefing CompletenessUnknown 
Investigator's weather sourceWeather Observation Facility 
Time of the weather observation1453 Eastern Standard Time 
Direction of event from weather observation facility (degrees)229 
Weather Observation Facility IDPDK 
Elevation of weather observation facility1002 
Distance of event from weather observation facility (units?)34 
Time Zone of the weather observationEST 
Lighting ConditionsDay 
Lowest Ceiling Height-- 
Lowest Non-Ceiling Height-- 
Sky/Lowest/Cloud ConditionsClear 
Sky Condition for Lowest Ceiling-- 
Visibility Runway Visual Range (Feet)-- 
Visibility Runway Visual Value (Statute Miles)-- 
Visibility (Statute Miles) 10 
Air Temperature at event time (in degrees celsius)21 
Dew Point at event time (in degress fahrenheit)
Wind Direction (degrees magnetic)290 
Variable Wind IndicatorWind direction could be determined 
Wind Speed (knots)
Wind Velocity Indicator -- 
Wind Gust IndicatorNot Gusting 
Wind Gust (knots) -- 
Altimeter Setting at event time (in. Hg) 30.01 
Density Altitude (feet)1855 
Intensity of Precipitation-- 
METAR weather report -- 
Event Highest InjuryFatal 
On Ground, Fatal Injuries-- 
On Ground, Minor Injuries-- 
On Ground, Serious Injuries-- 
Injury Total Fatal
Injury Total Minor-- 
Injury Total None-- 
Injury Total Serious-- 
Injury Total All
Investigating AgencyNTSB 
NTSB Docket Number (internal use)14143 
NTSB Notification SourceFAA  
NTSB Notification DateApr 1 2002 12:00AM 
NTSB Notification Time1530 
Fiche Number and/or location -used to find docket informationDMS 
Date of most recent change to recordNov 25 2003 11:36AM 
User who most recently changed recordNTSB\MONR  
Basic weather conditionsVisual Meteorological Cond 
FAA District OfficeAtlanta Fsdo 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN7471C 
NTSB NumberATL02FA072 
Missing Aircraft Indicator-- 
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?No 
DamageSubstantial 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NameNorth American 
Aircraft ModelT-6-AT6D 
Aircraft Series Identifier-- 
Aircraft Serial Number42-85550 
Certified Max Gross Weight4225 
Aircraft CategoryAirplane 
Aircraft Registration ClassU.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
Number of Engines
Fixed gear or retractable gearRetractable 
Aircraft, Type of Last InspectionAnnual 
Date of Last InspectionOct 10 2001 12:00AM 
Airframe hours since last inspection-- 
Airframe Hours5440.11 
ELT InstalledYes 
ELT ActivatedNo 
ELT Aided Location of Event SiteNo 
ELT Type-- 
Aircraft Owner NameRoger D Henderson 
Aircraft Owner Street Address42 Christopher CT 
Aircraft Owner CityEl Sobrante 
Aircraft Owner StateCT 
Aircraft Owner CountryUSA  
Aircraft Owner Zipcode94803 
Operator is an individual?No 
Operator NameU.S. Aircraft Inc., LLC 
Operator Same as Owner?No 
Operator Is Doing Business As-- 
Operator Address Same as Owner?No 
Operator Street Address709 Key Royale Drive 
Operator CityHolmes Beach 
Operator StateFL 
Operator CountryUSA  
Operator Zip code34218 
Operator Code-- 
Owner has at least one certificateNone 
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 BoardYes 
Departure Point Same as EventYes 
Departure Airport CodeGVL  
Departure CityGainesville 
Departure StateGA 
Departure CountryUSA 
Departure Time-- 
Departure Time ZoneEST 
Destination Same as Local Fltdest & departure same, accident can occur anywhere 
Destination Airport CodeGVL  
Destination CityGainesville 
Destination StateGA 
Destination CountryUSA 
Specific Phase of FlightTakeoff - initial climb 
Report sent to ICAO?No 
Evacuation occurredNo 
Date of most recent change to recordSep 18 2003 1:04PM 
User who most recently changed recordPOWP  
Since inspection or accidentLast Inspection 
Event Location Runway Number and Location290 
Runway Length4001 
Runway Width100 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight-- 

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