ASN Wikibase Occurrence # 133308
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| Date: | Thursday 13 January 1994 |
| Time: | 14:30 LT |
| Type: |  Aérospatiale AS 350 |
| Owner/operator: | Bulldog Airlines Inc. |
| Registration: | N902BA |
| MSN: | 1414 |
| Year of manufacture: | 1982 |
| Total airframe hrs: | 4343 hours |
| Engine model: | Lycoming LTS101-600-A2 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Lakeland, Polk County, Florida -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Survey |
| Departure airport: | Orlando, FL (NONE) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT-IN-COMMAND WAS MANEUVERING BETWEEN 500 TO 600 FEET AGL, AT 70 MPH, WHEN THE HELICOPTER EXPERIENCED A HIGH SIDE GOVERNOR FAILURE. HE RETARDED THE FUEL CONTROL LEVER (F.F.C.) AFT TO THE FLIGHT IDLE POSITION AND NOTED NO CHANGE. HE THEN MOVED THE THROTTLE TO THE OFF POSITION, TURNED THE FUEL CONTROL VALVE OFF, AND MADE A FORCED LANDING IN AN OPEN FIELD WHILE MANEUVERING IN THE DESCENT TO AVOID POWER LINES. THE HELICOPTER ROLLED OVER ON ITS LEFT SIDE DURING THE LANDING. EXAMINATION OF THE ENGINE BY THE FAA AND THE ENGINE MANUFACTURER CONFIRMED THE PILOT'S DIAGNOSIS OF A HIGH SIDE GOVERNOR FAILURE. THE EMERGENCY PROCEDURE IN THE FLIGHT MANUAL FOR A GOVERNOR FAILURE STATES, SLOWLY MOVE THE F.F.C. LEVER REARWARDS UNTIL ROTOR SPEED CORRESPONDS TO A POSITION OF THE INDICATOR POINTER IN THE CENTER OF THE GREEN AREA. THE MANUAL DOES NOT STATE THAT IN ORDER TO MODULATE THE FUEL FLOW, THE F.F.C. LEVER MUST GO BELOW THE FLIGHT IDLE POSITION.
Probable Cause: THE PILOT-IN-COMMAND'S FAILURE TO FOLLOW THE EMERGENCY PROCEDURE IN THE FLIGHT MANUAL FOR GOVERNOR MALFUNCTION. CONTRIBUTING TO THE ACCIDENT WAS INADEQUATE WRITTEN PROCEDURES IN THE FLIGHT MANUAL BY THE AIRCRAFT MANUFACTURER.
Accident investigation:
 |
|
Sources:
NTSB MIA94LA050
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=902BA
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Jun-2014 17:51 | Dr. John Smith | Updated [Time, Operator, Location, Departure airport, Source, Narrative] |
| 02-Jul-2014 19:08 | Dr. John Smith | Updated [Narrative] |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 09:21 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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