NTSB Identification: NYC83FGM01
14 CFR Part 91: General Aviation
Accident occurred Wednesday, October 20, 1982 in COALTOWN, PA
Probable Cause Approval Date: 10/20/1983
Aircraft: HUGHES 369D, registration: N31PL
Injuries: 3 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 PILOT AND TWO PASSENGERS WERE PATROLLING ALONG THE WEST'SIDE OF A POWER LINE FROM SOUTH TO NORTH. WHILE PATROLLING THE PILOT WAS MAINTAINING AN ALTITUDE OF 75 TO 100 FT AGL AT 20 TO 30 KTS WITH AN 8 TO 10 KT TAIL WIND. HE REPORTED THAT HE WAS DESCENDING DOWN A RIDGE WHEN THE HELICOPTER BEGAN A SLOW YAW TO THE RIGHT. HE STATED THAT FULL LEFT PEDDLE WAS USELESS AND THE HELICOPTER CONTINUED TO YAW TO THE RIGHT. HE REDUCED THE COLLECTIVE TO CONTROL THE RATE OF THE TURN, BUT BEGAN DESCENDING TOWARD THE WIRES. HE THEN INCREASED THE COLLECTIVE AND ADDED RIGHT CYCLIC TO AVOID THE WIRES. AFTER SPINNING 2 OR 3 TIMES, HE REDUCED THE POWER AND COLLECTIVE AND BEGAN AN AUTOROTATIVE LANDING. DURING THE LANDING, THE HELICOPTER TOUCHED DOWN HARD IN A WOODED AREA. A POST IMPACT FIRE DESTROYED THE FUSELAGE FROM STATION 164 FORWARD.

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

REASON FOR OCCURRENCE UNDETERMINED



Contributing Factors

TERRAIN CONDITION..HIGH OBSTRUCTION(S)




Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..HIGH VEGETATION

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