NTSB Identification: FTW83IA279.
The docket is stored on NTSB microfiche number 23155.
Nonscheduled 14 CFR
Incident occurred Sunday, June 12, 1983 in HIGH ISLAND 582
Aircraft: AEROSPATIALE AS 355 F, registration: N5796A
Injuries: 1 Uninjured.

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

ACFT DEVELOPED A SEVERE VERTICAL VIBRATION AND MADE A PRECAUTIONARY LANDING. FATIGUE CRACKS WERE FOUND WHICH ORIGINATED IN A CORROSION PIT LOCATED IN AN AREA OF CHIPPED PAINT WHICH HAD BEEN COVERED WITH A COAT OF PRIMER CONTRARY TO AEROSPATIALE SERVICE BULLETINS.

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

ROTOR DRIVE SYSTEM,MAIN ROTOR MAST(DRIVE SHAFT)..FATIGUE

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

ROTOR DRIVE SYSTEM,MAIN ROTOR MAST(DRIVE SHAFT)..CRACKED


Contributing Factors

MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..IMPROPER..COMPANY MAINTENANCE PERSONNEL

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