NTSB Identification: FTW88FA131.
The docket is stored on NTSB microfiche number 40079.
Nonscheduled 14 CFR
Accident occurred Thursday, July 14, 1988 in GULF-OF-MEXICO
Probable Cause Approval Date: 01/16/1990
Aircraft: AEROSPATIALE SA330J, registration: N47307
Injuries: 1 Fatal,1 Serious,14 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

DRG LIFT-OFF FROM AN OIL PLATFORM IN THE GULF OF MEXICO, THE HELICOPTER BGN A SLOW UNCOMMANDED LEFT TURN. THE PLT TRIED TO FLY IT BY LOWERING THE NOSE & INCREASING COLLECTIVE. AFTER 2 TURNS, THE HELICOPTER SETTLED & IMPACTED THE WATER IN A LEFT BANK, NOSE DOWN ATTITUDE. THE AUTO-PLT WAS NOT DISCONNECTED, NOR WERE THE FLOATS INFLATED. NO PREIMPACT MECH FAILURE WAS FOUND. INTERVIEWS REVEALED THE HELICOPTER WAS NOT STABILIZED IN A HOVER BEFORE INITIATING A TAKEOFF. THERE WAS A PREVIOUS WRITE-UP WHICH STATED 'A/C REQUIRES MORE RIGHT PEDAL THAN USUAL IN HOVER AND FORWARD FLIGHT.' IN RESPONSETO THIS WRITE-UP, A MECHANIC HAD ADJUSTED A TUBE WHICH RAN REARWARD FROM THE PEDAL ASSEMBLY TO THE LOWER PORTION OF THE AUTO-PILOT SYSTEM. THE MAINTENANCE MANUAL DESCRIBED THIS TUBE AS BEING ONE OF THE 'SEMI-FIXED' RODS. REFERRING TO THESE RODS, THE MANUAL CAUTIONED, 'THEY ARE ADJUSTED ONCE FOR ALL WHEN THEY ARE FITTED TO THE AIRCRAFT. THEY MUST NOT BE ADJUSTED SUBSEQUENTLY.'

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

NONE SUBMITTED

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