NTSB Identification: ATL84FA277.
The docket is stored on NTSB microfiche number 27046.
Accident occurred Saturday, September 01, 1984 in KNOXVILLE, TN
Aircraft: BELL 222, registration: N22299
Injuries: 1 Serious,4 Minor.
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.
THE HELICOPTER WAS IN A HOVER WHEN A RT PEDAL TURN WAS INITIATED AND A CLIMB ATTEMPTED. PLT STATED, 'I WAS UNABLE TO CLIMB, AND THE AIRCRAFT BEGAN TO LOSE ROTOR RPM. I INCREASED POWER TO 100% MRTQ. THE ACFT WAS SETTLING.' UNABLE TO SUSTAIN FLT, A LANDING WAS MADE AT A ROAD INTERSECTION DURING WHICH 3 VEHICLES WERE DAMAGED. THE ACFT WAS SUBSTANTIALLY DAMAGED BY FIRE. INSPECTION & TESTING REVEALED THE TORQUE CONTROL UNIT, P/N 222-360-010-101, WHICH LIMITS THE AMT OF COMBINED ENG TORQUE DELIVERED TO THE MAIN TRANSMISSION, WAS ADJUSTED TO 46.0 PSI. ACCORDING TO BELL MAINTENANCE MANUALS,THE UNIT SHOULD BE SET AT 48.5 PSI (+1.5/-0.0). THE UNIT WAS INSTALLED IN THE ACFT ON 3/1/82. IT COULD NOT BE DETERMINEDIF THE UNIT WAS ADJUSTED AT THE TIME OF INSTALLATION OR AFTER.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE..INADEQUATE
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