Aircraft Incident/Accident Report

South Pass 65, -- 00000
Thursday, August 19, 2004 7:05 CDT

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NTSB Narrative Summary Released at Completion of Accident
The 11,750-hour co-pilot heard a "loud bang" followed by a loss of tail rotor control that produced a 30-degree yaw to the right and a 15-20 degree "nose tuck." Subsequently, the co-pilot reduced power and initiated an autorotation to the water, and prior to touchdown, successfully deployed the emergency floats. The reason for the failure and separation of the tail rotor gearbox could not be determined.
NTSB Probable Cause Narrative
The failure and separation of the tail rotor gearbox for undetermined reasons.
Event Information
Type of EventIncident 
Event Date8/19/2004 
Event Day of the WeekThursday 
Time of Event705 
Event Time ZoneCentral Daylight Time 
Event CitySouth Pass 65 
Event Country-- 
Zipcode of the event site00000 
Event Date Year2004 
Event Date Month
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude290558N 
Event Location Longitude0885211W 
Event Location Airport-- 
Event Location Nearest Airport ID-- 
Indicates whether the acc/inc occurred off or on an airportOff Airport/Airstrip 
Distance from airport in statute miles-- 
Degrees magnetic from airport-- 
Airport Elevation-- 
Weather Briefing CompletenessFull 
Investigator's weather sourcePilot 
Time of the weather observation 
Direction of event from weather observation facility (degrees)-- 
Weather Observation Facility ID-- 
Elevation of weather observation facility-- 
Distance of event from weather observation facility (units?)-- 
Time Zone of the weather observation-- 
Lighting ConditionsDawn 
Lowest Ceiling Height-- 
Lowest Non-Ceiling Height-- 
Sky/Lowest/Cloud ConditionsScattered 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)-- 
Visibility Runway Visual Value (Statute Miles)-- 
Visibility (Statute Miles)
Air Temperature at event time (in degrees celsius)28 
Dew Point at event time (in degress fahrenheit)26 
Wind Direction (degrees magnetic)-- 
Variable Wind Indicator-- 
Wind Speed (knots)-- 
Wind Velocity Indicator Calm 
Wind Gust IndicatorNot Gusting 
Wind Gust (knots) -- 
Altimeter Setting at event time (in. Hg) 30.09 
Density Altitude (feet)-- 
Intensity of Precipitation-- 
METAR weather report -- 
Event Highest InjuryNone 
On Ground, Fatal Injuries-- 
On Ground, Minor Injuries-- 
On Ground, Serious Injuries-- 
Injury Total Fatal-- 
Injury Total Minor-- 
Injury Total None
Injury Total Serious-- 
Injury Total All-- 
Investigating AgencyNTSB 
NTSB Docket Number (internal use)17437 
NTSB Notification SourceFAA Operations Center  
NTSB Notification DateJul 19 2004 12:00AM 
NTSB Notification Time1030 
Fiche Number and/or location -used to find docket informationDMS 
Date of most recent change to recordMar 30 2005 6:20AM 
User who most recently changed recordNTSB\JOHB  
Basic weather conditionsVisual Meteorological Cond 
FAA District OfficeBaton Rouge, Louisiana 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN22347 
NTSB NumberFTW04IA217 
Missing Aircraft Indicator-- 
Federal Aviation Reg. PartPart 135: Air Taxi & Commuter 
Type of Flight Plan filedCompany VFR 
Flight plan Was Activated?Yes 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NameBell 
Aircraft Model412 
Aircraft Series Identifier-- 
Aircraft Serial Number36005 
Certified Max Gross Weight11900 
Aircraft CategoryHelicopter 
Aircraft Registration ClassU.S. Registered/U.S. Soil 
Aircraft is a homebuilt?No 
Flight Crew Seats-- 
Cabin Crew Seats-- 
Passenger Seats-- 
Total number of seats on the aircraft15 
Number of Engines
Fixed gear or retractable gearFixed 
Aircraft, Type of Last InspectionContinuous Airworthiness 
Date of Last InspectionAug 18 2004 12:00AM 
Airframe hours since last inspection11 
Airframe Hours14437 
ELT InstalledYes 
ELT ActivatedNo 
ELT Aided Location of Event SiteNo 
ELT Type-- 
Aircraft Owner NamePetroleum Helicopters Inc. 
Aircraft Owner Street Address2001 SE Evangeline Thruway 
Aircraft Owner CityLafayette 
Aircraft Owner StateLA 
Aircraft Owner CountryUSA  
Aircraft Owner Zipcode70508 
Operator is an individual?No 
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-- 
Other Operator of large aircraft?-- 
Certified for Part 133 or 137 Operation-- 
Operator Certificate Number-- 
Indicates whether an air carrier operation was scheduled or notNon-scheduled 
Indicates Domestic or International FlightDomestic 
Operator carrying Pax/Cargo/MailPassenger Only 
Type of Flying (Per_Bus / Primary)-- 
Second Pilot on BoardYes 
Departure Point Same as EventNo 
Departure Airport Code1B7  
Departure CityBoothville 
Departure StateLA 
Departure CountryUSA 
Departure Time635 
Departure Time ZoneCDT 
Destination Same as Local Flt-- 
Destination Airport Code-- 
Destination CityVK989  
Destination StateGM 
Destination CountryUSA 
Specific Phase of FlightCruise 
Report sent to ICAO?Yes 
Evacuation occurredYes 
Date of most recent change to record-- 
User who most recently changed record-- 
Since inspection or accidentTime of Accident 
Event Location Runway Number and LocationNA 
Runway Length-- 
Runway Width-- 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--