Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
High Isl Blk595
Tuesady, May 1, 1984 14:00 CDT
NTSB Narrative Summary Released at Completion of Accident
DURING CRUISE FLIGHT AT 500 FT OVER GULF WATERS, THE LEFT ENGINE SUSTAINED A MASSIVE, UNCONTAINED, EXPLOSIVE FAILURE. SHARPNEL PENETRATED THE RIGHT ENGINE, WHICH FAILED FROM DAMAGE. SHARPNEL ALSO PENETRATED THE AC AND DC JUNCTION BOXES, CAUSING COMPLETE ELECTRICAL FAILURE (NO MAYDAY CALL POSSIBLE). SHARPNEL FURTHER SEVERED THE TAIL ROTOR DRIVE SHAFT AND PENETRATED THE ACFT FUEL SYSTEM; FIRE BROKE OUT IN THE TRANSMISSION AREA AND THE COCKPIT FILLED WITH SMOKE. USING THE CO-PLT'S SIDE WINDOW FOR VISUAL ACQUISITION OF THE WATER SURFACE, A SUCCESSFUL AUTOROTATION WAS PERFORMED. HOWEVER, THE ACFT ROLLED OVER AND SANK SINCE THE EMERGENCY FLOATATION GEAR IS ELECTRICALLY OPERATED AND FAILED TO DEPLOY. AFTER SUCCESSFUL EVACUATION BY ALL OCCUPANTS, PLT RETURNED TO THE INVERTED ACFT AND DEPLOYED LIFE RAFTS. INVESTIGATION REVEALED LEFT ENGINE COMPRESSOR-TO-TURBINE COUPLING HAD FAILED IN FATIGUE. TURBINE WENT OVERSPEED AND BURST UNDER CENTRIFUGAL LOADS.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 5/1/1984 |
| Event Day of the Week | Tuesday |
| Time of Event | 1400 |
| Event Time Zone | Central Daylight Time |
| Event City | HIGH ISL BLK595 |
| Event State | GULF OF MEXICO |
| Event Country | -- |
| Zipcode of the event site | |
| Event Date Year | 1984 |
| Event Date Month | 5 |
| 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 | Unknown |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Pilot |
| Time of the weather observation | 1400 |
| 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 | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 5 |
| Air Temperature at event time (in degrees celsius) | 23 |
| Dew Point at event time (in degress fahrenheit) | 21 |
| Wind Direction (degrees magnetic) | 11 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 6 |
| 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 | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2644 |
| NTSB Notification Source | -- |
| NTSB Notification Date | -- |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | 26590 |
| Date of most recent change to record | Jan 2 2001 9:15AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N763AL |
| NTSB Number | FTW84FA216 |
| 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 | Ground |
| Aircraft Explosion | In-flight |
| Aircraft Manufacturer's Full Name | SIKORSKY |
| Aircraft Model | S-76A |
| Aircraft Series Identifier | S-76A |
| Aircraft Serial Number | 760019 |
| Certified Max Gross Weight | 7500 |
| 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 | 14 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Mar 26 1984 12:00AM |
| Airframe hours since last inspection | 80 |
| Airframe Hours | 3589 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | AIR LOGISTIC INC. |
| Aircraft Owner Street Address | 3921 INDUSTRIAL DR. |
| Aircraft Owner City | NEW IBERIA |
| Aircraft Owner State | LA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 70560 |
| 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 | 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/Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | |
| Departure City | HI ISL BLK 595 |
| Departure State | GM |
| Departure Country | |
| Departure Time | 1325 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | |
| Destination City | FREEPORT |
| Destination State | TX |
| Destination Country | |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| 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 | -- |