NTSB Identification: MIA89LA024.
The docket is stored on NTSB microfiche number 38201.
Accident occurred Thursday, November 10, 1988 in ST. THOMAS
Probable Cause Approval Date: 11/24/1989
Aircraft: BELL 206L, registration: N16619
Injuries: 2 Minor,2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT AUTOROTATED THE HELICOPTER INTO THE WATER AFTER A LOSS OF POWER WHILE TRANSITIONING FROM FWD FLIGHT TO A HOVER. WHILE LANDING WITH THE EMERGENCY FLOATS ARMED, HE ATTEMPTED TO DEPLOY THE FLOATS BUT WAS UNABLE. THE PLT & PAX EVACUATED. THE HELICOPTER SANK. EXAMINATION REVEALED THE ELECTRICAL WIRES FOR ACTIVATION OF THE DISCHARGE AGENT SEPARATED ON IMPACT, RENDERING THE FLOAT DEPLOYMENT SYSTEM INOPERABLE. THE COMPRESSOR SECTION OF THE ENGINE SUSTAINED A CONTAINED FAILURE. THERE WAS NO EVIDENCE OF FOREIGN OBJECT INGESTION, FAILURE OR MALFUNCTION OF NO'S 1,2, OR 2.5 BEARINGS, RUBBING OF THE ROTOR BLADES AGAINST THE COMPRESSOR CASE, OR AXIAL MOVEMENT OF THE ROTOR ASSY. A METALLURGICAL EXAMINATION WAS UNABLE TO DETERMINE THE EVENT RESULTING IN THE FAILURE OF THE COMPRESSOR SECTION. THE OPERATOR STATED THAT COMPANY PERSONNEL WERE NOT ACCOMPLISHING THE SALT WATER CONTAMINATION REMOVAL PROCEDURE RECOMMENDED BY THE ENG MANUFACTURER.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

COMPRESSOR ASSEMBLY,ROTOR DISC..DISINTEGRATED


Contributing Factors

EMERGENCY EQUIPMENT..DELAYED..PILOT IN COMMAND


Contributing Factors

MISC ROTORCRAFT,EMERGENCY FLOATATION GEAR..DISABLED

Index for Nov1988 | Index of months