Aircraft Accident/Incident Report

St. Martinville, Louisiana 70582
Thursday, April 16, 1998 20:20 CDT

NTSB Narrative Summary Released at Completion of Accident

The non-instrument rated commercial pilot lost control of the airplane after encountering instrument meteorological conditions and moderate to severe turbulence while on a night cross-country flight. The wreckage of the airplane was located the following day in a remote unpopulated area approximately 19 miles east of Lafayette. There were no reported eye witnesses to the accident. Prior to the loss of control, the pilot received VFR traffic advisories from Air Traffic Control (ATC) while conducting flight at 11,500 feet. Radar and radio contact were lost when the airplane was about 20 nautical miles east of Lafayette. The airplane was last observed by radar at 10,200 feet. No distress calls were received from the aircraft. ATC advised the pilot of a weather advisory which called for a 30mile wide area of moderate to severe turbulence from 4,000 to 12,000 feet associated with wind shear. About 20 minutes prior to the accident, a pilot of an ATR72 airplane reported encountering moderate to severe turbulence between 5,000 and 8,000 feet, about 10.5 nm north of the accident site. The pilot had been provided with weather advisories calling for adverse weather and marginal VFR along his anticipated route of flight. No structural or mechanical anomalies were observed during an examination of the airplane.

NTSB Probable Cause Narrative

The pilot's failure to maintain control of the aircraft as a result of VFR flight into instrument meteorological conditions and flight into known adverse weather conditions. Contributing factors were turbulence, clouds, dark night and lack of an instrument rating.

Event Information

Type of Event Accident
Event Date 4/16/1998
Event Day of the Week Thursday
Time of Event 2020
Event Time Zone Central Daylight Time
Event City ST. MARTINVILLE
Event State LOUISIANA
Event Country --
Zipcode of the event site 70582
Event Date Year 1998
Event Date Month 4
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 Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 2010 Central Daylight Time
Direction of event from weather observation facility (degrees) 285
Weather Observation Facility ID LFT
Elevation of weather observation facility 42
Distance of event from weather observation facility (units?) 19
Time Zone of the weather observation CDT
Lighting Conditions Day
Lowest Ceiling Height 1300
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 4
Air Temperature at event time (in degrees celsius) 24
Dew Point at event time (in degress fahrenheit) 22
Wind Direction (degrees magnetic) 200
Variable Wind Indicator Unknown
Wind Speed (knots) 8
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) --
Intensity of Precipitation Unknown
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 2
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 935
NTSB Notification Source --
NTSB Notification Date Apr 16 1998 12:00AM
NTSB Notification Time 2241
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 11 2000 11:07AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N238BC
NTSB Number FTW98FA185
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire Ground
Aircraft Explosion None
Aircraft Manufacturer's Full Name Young
Aircraft Model GLASAIR III
Aircraft Series Identifier GLASAIR II
Aircraft Serial Number 3099
Certified Max Gross Weight 2500
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? Yes
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Sep 22 1997 12:00AM
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site Yes
ELT Type --
Aircraft Owner Name JACK D. SIEBENHAAR
Aircraft Owner Street Address 2253 W. NARANJA AVE.
Aircraft Owner City MESA
Aircraft Owner State AZ
Aircraft Owner Country
Aircraft Owner Zipcode 85202
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) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code LCH
Departure City LAKE CHARLES
Departure State LA
Departure Country
Departure Time 1950
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code LAL
Destination City LAKELAND
Destination State FL
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 --