Individually Owned: 150,657
Corporate Owned: 137,281
S. Tim 151 Airport
Aircraft Accident/Incident Report
S.Timbalier 151
Tuesady, January 3, 1989 12:50 CST
NTSB Narrative Summary Released at Completion of Accident
THE ACFT EXPERIENCED AN ENG FAILURE DURING A SLING LOAD PICK UP ON AN OFFSHORE PLATFORM. DURING THE AUTOROTATION, THE LEFT SKID AND FLOAT STRUCK A HANDRAIL ON THE RIG AND SEPARATED. THE ACFT IMPACTED THE WATER, NOSE LOW, AND ROLLED OVER AS A RESULT OF THE SEPARATED FLOAT. INVESTIGATION REVEALED THAT THE ENG FAILURE WAS A RESULT OF A 6TH STAGE COMPRESSOR WHEEL FATIGUE FAILURE. THE WHEEL FATIGUE ORIGINATED AT A CASTING INCLUSION THAT HAD NOT BEEN DETECTED DURING THE MANUFACTURING PROCESS.
NTSB Probable Cause Narrative
A COLLISION BETWEEN THE AIRCRAFT AND THE PLATFORM DURING THE EMERGENCY AUTOROTATION WHICH CAUSED THE LEFT SKID AND FLOAT TO SEPARATE AND DESTABILIZED THE AUTOROTATION. THE COLLISION WAS PROBABLY UNADOIDABLE DUE TO THE MANEUVER THAT WAS BEING CONDUCTED AT THE ONSET OF THE EMERGENCY. THE EMERGENCY LANDING WAS ATTEMPTED FOLLOWING AN ENGINE FAILURE THAT WAS THE RESULT OF A TOTAL COMPRESSOR FAILURE. THE COMPRESSOR FAILURE WAS CAUSED BY A FATIGUE FAILURE OF THE SIXTH STAGE WHEEL WHICH SEPARATED. THE FAILURE WAS INITIATED DUE TO A CASTING INCLUSION IN THE WHEEL WHICH WAS NOT DETECTED DURING THE MANUFACTURING PROCESS.
Event Information
| Type of Event | Accident |
| Event Date | 1/3/1989 |
| Event Day of the Week | Tuesday |
| Time of Event | 1250 |
| Event Time Zone | Central Standard Time |
| Event City | S.TIMBALIER 151 |
| Event State | GULF OF MEXICO |
| Event Country | -- |
| Zipcode of the event site | 00000 |
| Event Date Year | 1989 |
| Event Date Month | 1 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | S. TIM 151 |
| Event Location Nearest Airport ID | 151 |
| 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 | 80 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1250 Central Standard Time |
| Direction of event from weather observation facility (degrees) | 135 |
| Weather Observation Facility ID | 300 |
| Elevation of weather observation facility | 80 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | CST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 10000 |
| Lowest Non-Ceiling Height | 1500 |
| 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) | 10 |
| Air Temperature at event time (in degrees celsius) | 26 |
| Dew Point at event time (in degress fahrenheit) | 22 |
| Wind Direction (degrees magnetic) | 270 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 16 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| 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 | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 965 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jan 3 1989 12:00AM |
| NTSB Notification Time | 1400 |
| Fiche Number and/or location -used to find docket information | 39128 |
| Date of most recent change to record | Dec 13 2000 12:25PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N22704 |
| NTSB Number | FTW89LA036 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 133: Rotorcraft Ext. Load |
| Type of Flight Plan filed | Company VFR |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | BELL |
| Aircraft Model | 206B-III |
| Aircraft Series Identifier | 206B-III |
| Aircraft Serial Number | 3614 |
| Certified Max Gross Weight | 3200 |
| 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 | 5 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Dec 18 1988 12:00AM |
| Airframe hours since last inspection | 45 |
| Airframe Hours | 8213 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | PETROLEUM HELICOPTERS, INC |
| Aircraft Owner Street Address | P.O. BOX 90808 |
| Aircraft Owner City | LAFAYETTE |
| Aircraft Owner State | LA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 70509 |
| 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 | PHM |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | External Load |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Unknown |
| Indicates Domestic or International Flight | Unknown |
| Operator carrying Pax/Cargo/Mail | Unknown |
| Type of Flying (Per_Bus / Primary) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | |
| Departure City | S.T. 151 |
| Departure State | |
| Departure Country | |
| Departure Time | 1245 |
| Departure Time Zone | CST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | |
| Destination City | S.T. 151 |
| Destination State | |
| 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 | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |