Aircraft Accident/Incident Report

Guntersville, Alabama 35976
Wednesday, August 12, 1992 18:30 CDT

NTSB Narrative Summary Released at Completion of Accident

THE PILOT WAS PROCEEDING TO HIS DESTINATION AT FLIGHT LEVEL 210, BETWEEN CLOUD LAYERS. HE WAS APPROACHING A CLOUD CELL, AND REQUESTED TO DEVIATE TO THE NORTH. THE PILOT NOTICED NOTHING ON HIS WEATHER RADAR, AND HE DECIDED TO CONTINUE ON COURSE AFTER A VFR AIRCRAFT AHEAD OF HIM REPORTED NO SIGNIFICANT TURBULENCE. AS HE ENTERED THE CLOUD FORMATION, THERE WAS 'ONE VERY HARD HIT OF TURBULENCE', WITH ASSOCIATED ICE AND HAIL. HE THEN LOST CONTROL OF THE AIRCRAFT. AFTER A LOSS OF ABOUT 10,000 FEET OF ALTITUDE, HE WAS ABLE TO REGAIN AIRCRAFT CONTROL. DURING THE RECOVERY, HE NOTICED THE AIRSPEED IN EXCESS OF 'RED LINE.' HE LANDED THE AIRPLANE AT A NEARBY AIRPORT WITHOUT FURTHER INCIDENT. AN FAA INSPECTOR DETERMINED THAT THE AIRCRAFT WAS STRUCTURALLY DAMAGED IN FLIGHT. NTAP RADAR DATA SHOWS THAT THE FLIGHT PENETRATED AN AREA OF HEAVY WEATHER RETURNS.

NTSB Probable Cause Narrative

THE PILOT'S INADEQUATE EVALUATION OF THE IN FLIGHT WEATHER CONDITIONS, AND HIS SUBSEQUENT LOSS OF AIRCRAFT CONTROL, WHICH RESULTED IN THE DESIGN STRESS LIMITS OF THE AIRCRAFT BEING EXCEEDED. FACTORS WERE CLOUDS, THE ASSOCIATED TURBULENCE, AND THE HAIL IN THE CLOUDS.

Event Information

Type of Event Accident
Event Date 8/12/1992
Event Day of the Week Wednesday
Time of Event 1830
Event Time Zone Central Daylight Time
Event City GUNTERSVILLE
Event State ALABAMA
Event Country --
Zipcode of the event site 35976
Event Date Year 1992
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 0
Degrees magnetic from airport 0
Airport Elevation --
Weather Briefing Completeness Full
Investigator's weather source Weather Observation Facility
Time of the weather observation 1950 Central Daylight Time
Direction of event from weather observation facility (degrees) 40
Weather Observation Facility ID HSV
Elevation of weather observation facility 630
Distance of event from weather observation facility (units?) 29
Time Zone of the weather observation CDT
Lighting Conditions Day
Lowest Ceiling Height 11000
Lowest Non-Ceiling Height 4000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 7
Air Temperature at event time (in degrees celsius) 26
Dew Point at event time (in degress fahrenheit) 23
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) --
Intensity of Precipitation Light
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor 1
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 2888
NTSB Notification Source --
NTSB Notification Date Aug 12 1992 12:00AM
NTSB Notification Time 2130
Fiche Number and/or location -used to find docket information 47732
Date of most recent change to record Dec 11 2000 3:11PM
User who most recently changed record dbo
Basic weather conditions Instrument Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N416HC
NTSB Number ATL92LA159
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed IFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name BEECH
Aircraft Model A36
Aircraft Series Identifier A36
Aircraft Serial Number E-2408
Certified Max Gross Weight 3650
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 --
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection Jan 2 2000 12:00AM
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Unknown
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name TREES UNLIMITED, INC.
Aircraft Owner Street Address 1422 WINDSONG, A-1 PLANTATION
Aircraft Owner City AMELIA ISLAND
Aircraft Owner State FL
Aircraft Owner Country
Aircraft Owner Zipcode 32034
Operator is an individual? --
Operator Name TREES UNLIMITED, INC.
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 1422 WINDSONG, A-1 PLANTATION
Operator City AMELIA ISLAND
Operator State FL
Operator Country
Operator Zip code 32034
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) Ferry
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code LIT
Departure City LITTLE ROCK
Departure State AR
Departure Country
Departure Time 1530
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code PDK
Destination City ATLANTA
Destination State GA
Destination Country
Specific Phase of Flight Cruise
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 --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --