Aircraft Accident/Incident Report

Dayton, Tennessee 37321
Thursday, March 8, 1990 9:48 EST

NTSB Narrative Summary Released at Completion of Accident

THE PILOT HAD REPORTED LEVEL AT 11,000 FT. A SHORT TIME LATER, WHEN ATC REQUESTED HIS HEADING, HE RESPONDED THAT HE HAD AN AUTOPILOT MALFUNCTION. ATC ASKED THE PILOT IF HE WANTED VECTORS. THE PILOT RESPONDED 'PLEASE.' THERE WERE NO FURTHER COMMUNICATIONS WITH THE AIRCRAFT. THE AIRCRAFT IMPACTED INTO A RIVER IN A STEEP ANGLE ALMOST DIRECTLY BELOW HIS LAST REPORTED POSITION. THE PILOT WAS IN IMC CONDITIONS, WHILE EN ROUTE TO HAVE AUTOPILOT MAINTENANCE. HE WAS KNOWN TO RELY ON HIS AUTOPILOT DURING IFR FLIGHT.

NTSB Probable Cause Narrative

THE PILOT'S INTENTIONAL USE OF AN AUTOPILOT WITH KNOWN DEFICIENCIES. THE PILOT KNOWINGLY RELIED ON THIS AUTOPILOT WHICH MALFUNCTIONED IN FLIGHT AND RESULTED IN HIS BECOMING SPATIALLY DISORIENTATED.

Event Information

Type of Event Accident
Event Date 3/8/1990
Event Day of the Week Thursday
Time of Event 948
Event Time Zone Eastern Standard Time
Event City DAYTON
Event State TENNESSEE
Event Country --
Zipcode of the event site 37321
Event Date Year 1990
Event Date Month 3
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 0
Degrees magnetic from airport 0
Airport Elevation 0
Weather Briefing Completeness Full
Investigator's weather source Weather Observation Facility
Time of the weather observation 952 Eastern Standard Time
Direction of event from weather observation facility (degrees) 320
Weather Observation Facility ID CSV
Elevation of weather observation facility 1881
Distance of event from weather observation facility (units?) 27
Time Zone of the weather observation EST
Lighting Conditions Day
Lowest Ceiling Height 600
Lowest Non-Ceiling Height 400
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 2
Air Temperature at event time (in degrees celsius) 6
Dew Point at event time (in degress fahrenheit) 5
Wind Direction (degrees magnetic) 150
Variable Wind Indicator Unknown
Wind Speed (knots) 7
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) 0
Intensity of Precipitation Light
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal 1
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 270
NTSB Notification Source --
NTSB Notification Date Mar 8 1990 12:00AM
NTSB Notification Time 1200
Fiche Number and/or location -used to find docket information 41119
Date of most recent change to record Dec 12 2000 4:49PM
User who most recently changed record dbo
Basic weather conditions Instrument Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N7123Y
NTSB Number ATL90FA074
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed IFR
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PIPER
Aircraft Model PA-30
Aircraft Series Identifier PA-30
Aircraft Serial Number 30-142
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 4
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Nov 1 1989 12:00AM
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Unknown
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name WILMA PETE
Aircraft Owner Street Address BOX 627
Aircraft Owner City CROSSVILLE
Aircraft Owner State TX
Aircraft Owner Country
Aircraft Owner Zipcode 38555
Operator is an individual? --
Operator Name LOWELL B. PETE
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? 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) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code CSV
Departure City CROSSVILLE
Departure State TN
Departure Country
Departure Time 928
Departure Time Zone EST
Destination Same as Local Flt --
Destination Airport Code LEE
Destination City LEESBURG
Destination State FL
Destination Country
Specific Phase of Flight Descent
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:35AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length 0
Runway Width 0
Sight Seeing flight No
Air Medical Flight No
Medical Flight --