NTSB Identification: NYC82FGM11
14 CFR Part 91: General Aviation
Accident occurred Tuesday, June 15, 1982 in KITTANNING, PA
Probable Cause Approval Date: 06/15/1983
Aircraft: BELL 47G-3B-1, registration: N9276Z
Injuries: 1 Fatal,2 Serious.

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 ON A POWERLINE PATROL FLIGHT WITH THREE OCCUPANTS ON BOARD. WHILE PROCEEDING ALONG THE POWERLINE WITH A TAILWIND, THE PILOT STARTED TO CLIMB OVER A HILL. HE STATED TO THE PASSENGERS THAT HE WAS UNABLE TO OUT CLIMB THE HILL, THEN CIRCLED TO THE RIGHT AND GAINED MORE AIRSPEED TO TOP THE HILL. AFTER TOPPING THE HILL, HE STARTED DOWN THE OTHER SIDE WHILE TO THE LEFT AND ABOUT 10 FT ABOVE THE POWERLINE WITH AN AIRSPEED OF 0 TO 20 KTS. ABOUT 1/4 MILE DOWN THE HILL AND AT 200 FT LOWER ELEVATION, THE HELICOPTER APPROACHED ANOTHER LINE THAT CROSSED OVER THE LINE THAT WAS BEING PATROLLED. AT ABOUT THAT TIME, THE HELICOPTER ENTERED A STEEP TURN OVER THE LINE BEING PATROLLED AND BELOW THE OTHER. THE HELICOPTER AVOIDED THE LINES, BUT CRASHED. THE TRANSMISSION SHEARED DURING IMPACT, MOVED FORWARD, AND CAUSED FATAL INJURY TO THE PILOT. THE PASSENGERS SUSPECTED A LOSS OF POWER, BUT NO PRECRASH FAILURE WAS FOUND. AC61-13B WARNS OF POSSIBLE "SETTLING WITH POWER" IN STEEP POWER APPROACHES NEAR ZERO AIRSPEED.

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

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND

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

CLEARANCE..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..TAILWIND


Contributing Factors

TERRAIN CONDITION..HIGH OBSTRUCTION(S)

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