Aircraft Accident/Incident Report

Clarksburg, Tennessee 38324
Friday, August 19, 1994 17:40 CDT

NTSB Narrative Summary Released at Completion of Accident

WHILE EN ROUTE TO HIS DESTINATION AIRPORT, THE PILOT EXPERIENCED COMPLETE LOSS OF ENGINE POWER. THE PILOT SELECTED A PASTURE AND MADE AN EMERGENCY LANDING. DURING THE ROLLOUT, THE AIRPLANE COLLIDED WITH TREES ALONG A FENCE LINE. EXAMINATION OF THE ENGINE DISCLOSED THAT THE ALTERNATOR DRIVE COUPLING FAILED, AND DEBRIS FROM THE COUPLING LODGED IN THE ENGINE OIL PUMP DRIVE; THE ENGINE EXPERIENCED A LOSS OF ENGINE OIL PRESSURE.

NTSB Probable Cause Narrative

THE FAILURE OF THE ALTERNATOR DRIVE COUPLING, AND DEBRIS FROM THE FAILED COUPLING THAT LODGED IN THE ENGINE OIL PUMP, RESULTING IN A SHEARED OIL PUMP DRIVE SHAFT. THE ENGINE SUBSEQUENTLY FAILED BECAUSE OF OIL STARVATION.

Event Information

Type of Event Accident
Event Date 8/19/1994
Event Day of the Week Friday
Time of Event 1740
Event Time Zone Central Daylight Time
Event City CLARKSBURG
Event State TENNESSEE
Event Country --
Zipcode of the event site 38324
Event Date Year 1994
Event Date Month 8
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 Full
Investigator's weather source Weather Observation Facility
Time of the weather observation 1651 Central Daylight Time
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID MKL
Elevation of weather observation facility 433
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation CDT
Lighting Conditions Day
Lowest Ceiling Height 25000
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) 12
Air Temperature at event time (in degrees celsius) 31
Dew Point at event time (in degress fahrenheit) 21
Wind Direction (degrees magnetic) 220
Variable Wind Indicator Unknown
Wind Speed (knots) 5
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) 1750
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) 1309
NTSB Notification Source --
NTSB Notification Date Aug 19 1994 12:00AM
NTSB Notification Time 2222
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 6 2000 11:56AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N9797V
NTSB Number ATL94LA158
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed VFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 172XP
Aircraft Series Identifier 172XP
Aircraft Serial Number 1722350
Certified Max Gross Weight 1700
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 Aug 31 1993 12:00AM
Airframe hours since last inspection 60
Airframe Hours 1087
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name BRYAN, THOMAS E. SR
Aircraft Owner Street Address 4267 AMBER LANE
Aircraft Owner City MEMPHIS
Aircraft Owner State TN
Aircraft Owner Country
Aircraft Owner Zipcode 38111
Operator is an individual? --
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? No
Certified for Part 133 or 137 Operation Unknown
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) Business
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code JWN
Departure City NASHVILLE
Departure State TN
Departure Country
Departure Time 1640
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code OLV
Destination City MEMPHIS
Destination State TN
Destination Country
Specific Phase of Flight Cruise
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 --