Individually Owned: 151,845
Corporate Owned: 143,699
Aircraft Accident/Incident Report
W Cameron Blk
Sunday, May 7, 1989 14:04 CDT
NTSB Narrative Summary Released at Completion of Accident
THE TWIN ENGINE HELICOPTER WAS IN CRUISE FLIGHT OVER THE GULF OF MEXICO, WHEN IT SUDDENLY PITCHED NOSE DOWN AND DESCENDED UNCONTROLLED TO IMPACT INVERTED INTO THE WATER. IT SANK TO A DEPTH OF APPROXIMATELY 380 FEET. AFTER RECOVERY OF THE HELICOPTER, EXAMINATION REVEALED THAT AN INCORRECT HYDRAULIC SWITCH GUARD HELD THE TEST SWITCH IN THE RESET POSITION, ELECTRICALLY ISOLATING HYDRAULIC SYSTEM NUMBER TWO FROM OPERATION, AND THAT THE HYDRAULIC MODULE WAS IN THE NUMBER 1 SYSTEM. FURTHER INSPECTION AND TESTING FOUND A DEFECTIVE MICRO-SWITCH IN THE OUTBOARD LATERAL GUIDE ASSEMBLY OF THE HYDRAULIC MODULE. ADDITIONALLY, THE OPERATOR HAD NOT COMPLIED WITH A REQUIRED SERVICE BULLETIN FOR THE MODULE.
NTSB Probable Cause Narrative
THE PARTIAL ELECTRICAL FAILURE OF THE MICRO-SWITCH FOR THE OUTBOARD LATERAL GUIDE ASSEMBLY, AND THE INCORRECT GUARD INSTALLED ON THE HYDRAULIC TEST SWITCH, RESULTING IN A TOTAL HYDRAULIC FAILURE. FACTORS WERE: THE INCORRECT INSTALLATION OF THE GUARD BY AN UNKNOWN PERSON, THE FAILURE OF THE COMPANY TO COMPLY WITH THE SPECIFIED SERVICE BULLETIN.
Event Information
| Type of Event | Accident |
| Event Date | 5/7/1989 |
| Event Day of the Week | Sunday |
| Time of Event | 1404 |
| Event Time Zone | Central Daylight Time |
| Event City | W CAMERON BLK |
| Event State | GULF OF MEXICO |
| Event Country | -- |
| Zipcode of the event site | 00000 |
| Event Date Year | 1989 |
| 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 | NONE |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Witness |
| 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 | 10000 |
| 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) | 25 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 17 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | 0 |
| 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 | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2368 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 7 1989 12:00AM |
| NTSB Notification Time | 2030 |
| Fiche Number and/or location -used to find docket information | 43008 |
| Date of most recent change to record | Dec 13 2000 12:40PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2785B |
| NTSB Number | FTW89FA093 |
| 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 | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | MBB |
| Aircraft Model | BO-105S |
| Aircraft Series Identifier | BO-105S |
| Aircraft Serial Number | 636 |
| Certified Max Gross Weight | 5512 |
| 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 | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | May 6 1989 12:00AM |
| Airframe hours since last inspection | 3 |
| Airframe Hours | 1781 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | Yes |
| ELT Type | -- |
| Aircraft Owner Name | MCDONNELL DOUGLAS FINANCE CORP |
| Aircraft Owner Street Address | 340 GOLDEN SHORE |
| Aircraft Owner City | LONG BEACH |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 90802 |
| Operator is an individual? | -- |
| Operator Name | AIR LOGISTICS |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 3921 INDUSTRIAL DR. |
| Operator City | NEW IBERIA |
| Operator State | LA |
| Operator Country | |
| Operator Zip code | 70560 |
| Operator Code | SW-N |
| 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 | No |
| Departure Point Same as Event | No |
| Departure Airport Code | NONE |
| Departure City | HI-A330 |
| Departure State | GM |
| Departure Country | |
| Departure Time | 1401 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | NONE |
| Destination City | WC-643 |
| Destination State | GM |
| Destination Country | |
| Specific Phase of Flight | Cruise |
| 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 | -- |