Aircraft Accident/Incident Report

Morgan City, Louisiana 70380
Friday, September 13, 1996 7:10 CDT

NTSB Narrative Summary Released at Completion of Accident

The helicopter was in route to South Marsh 243C in the Gulf Of Mexico from Morgan City, Louisiana. Approximately 5 minutes into the flight, at an altitude of 500 feet AGL, 'a loud continuous, chattering and violent vibration started without warning.' During the emergency landing to a canal, about 50 feet above the trees, the vibration totally ceased; however, the helicopter began turning to the right. At this time the pilot initiated an autorotation and deployed the floats. The helicopter touched down on the water in a level attitude at 20 to 25 MPH, and the helicopter came to rest on its side. One tail rotor blade was sheared from the leading edge to the trailing edge at the outboard end. Scanning of the sheared area by energy dispersive x-ray analysis (EDXA) revealed elements of lead and chromium in one area, and titanium, iron, nickel and chromium in another area. Examination of the area which contained the elements of lead and chromium with an optical microscope at 60X magnification, revealed particles of red paint within this area. The object that struck the tail rotor blade could not be determined.

NTSB Probable Cause Narrative

The loss of tail rotor control as result of a tail rotor blade strike by an undetermined object. A factor was the lack of suitable terrain for the forced landing.

Event Information

Type of Event Accident
Event Date 9/13/1996
Event Day of the Week Friday
Time of Event 710
Event Time Zone Central Daylight Time
Event City MORGAN CITY
Event State LOUISIANA
Event Country --
Zipcode of the event site 70380
Event Date Year 1996
Event Date Month 9
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 Not pertinent
Investigator's weather source Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 2000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 24
Dew Point at event time (in degress fahrenheit) 16
Wind Direction (degrees magnetic) 270
Variable Wind Indicator Unknown
Wind Speed (knots) 5
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 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 5
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1416
NTSB Notification Source --
NTSB Notification Date Sep 13 1996 12:00AM
NTSB Notification Time 905
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 8 2000 10:21AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N2654
NTSB Number FTW96LA386
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 135: Air Taxi & Commuter
Type of Flight Plan filed Company VFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Bell
Aircraft Model 206L-1/C-30P
Aircraft Series Identifier 206L-1/C-3
Aircraft Serial Number 45482
Certified Max Gross Weight 4150
Aircraft Category Helicopter
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 7
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection AAIP
Date of Last Inspection Sep 12 1996 12:00AM
Airframe hours since last inspection 0
Airframe Hours 16603
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name MOBIL ADMIN SVCS CO INC
Aircraft Owner Street Address 1200 YOUNGS ROAD
Aircraft Owner City MORGAN CITY
Aircraft Owner State LA
Aircraft Owner Country
Aircraft Owner Zipcode 70380
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 ZV1A
Owner has at least one certificate Yes - certificate holder
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 Non-scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) Unknown
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code 5LA2
Departure City
Departure State
Departure Country
Departure Time 705
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code
Destination City SO. MARSH 243
Destination State GM
Destination Country
Specific Phase of Flight --
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 --