NTSB Identification: LAX86MA311.
The docket is stored on NTSB microfiche number 32709.
Accident occurred Sunday, August 03, 1986 in ALAMO, CA
Probable Cause Approval Date: 05/27/1988
Aircraft: BELL 206B, registration: N49606
Injuries: 2 Fatal.

NTSB investigators traveled in support of this investigation and used data obtained from various sources to prepare this aircraft accident report.

WITNESSES REPORTED SEEING THE HELICOPTER CIRCLE TWICE OVER A RESIDENCE AT AN ALT OF APRX 50' AGL. UPON INITIATING THE THIRD TURN THE HELICOPTER ENTERED AN ABRUPT 90 DEG BANK AND NOSED DOWN TO IMPACT WITH THE TERRAIN. EXAM OF THE HELICOPTER FAILED TO REVEAL ANY FAILURE/MALFUNCTION. POSTMORTEM EXAM OF THE PLT REVEALED SEVERE ARTHERIOSCLEROTIC HEART DISEASE WHICH MOST PROBABLY RESULTED IN A CATASTROPHIC MYOCARDIAL EVENT JUST PRIOR TO THE ACCIDENT. THE PLT HAD A HISTORY OF HEART DISEASE DATING PRIOR TO OCT, 1981. IN SEPT, 1984, THE PLT WAS DENIED A CLASS II MEDICAL BASED ON HIS MEDICAL HISTORY. IN JAN, 1985, THE NEWLY APPOINTED FAS ISSUED A SPECIAL ISSUANCE CLASS II WITHOUT FURTHER MEDICAL EXAMS.AFTER FURTHER MEDICAL EXAMS IN APRIL, 1986, THE PLT WAS ISSUED AN UNRESTRICTED CLASS II MEDICAL IN MAY, 1986. AT THIS TIME THE PLT WAS ADVISED TO REPORT ANY CHANGES IN HIS MEDICAL CONDITION. DURING THAT SAME MONTH, THE PLT WAS HOSPITALIZED FOR A MYOCARDIAL INFARCTION. THIS EVENT WAS NOT REPORTED TO THE FAS AND THE PLT CONTINUED FLYING.

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

INCAPACITATION(CARDIOVASCULAR)..PILOT IN COMMAND




Contributing Factors

INSTRUCTIONS,WRITTEN/VERBAL..NOT FOLLOWED..PILOT IN COMMAND


Contributing Factors

INADEQUATE CERTIFICATION/APPROVAL,AIRMAN..FAA(ORGANIZATION)

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