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NTSB Report
September 12, 1984 · Bell 206B · N1086Y
Vernal, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 12, 1984
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Vernal, UT
Aircraft
Bell 206B
Tail Number
N1086Y
Operator
Telestar
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN84LA288
PLT STATED THAT WHILE ON A HEADING OF 050 DEGS (WIND FROM 270 DEGS AT 5 KTS) THE ACFT BEGAN TO SHUDDER AND VEERED TO THE RIGHT. PLT ATTEMPTED REMEDIAL ACTION BUT ACFT CONTINUED DESCENDING IN A RIGHT SPIRAL TO GROUND CONTACT. EXAMINATION OF THE HELICOPTER DID NOT DISCLOSE ANY MECHANINCAL FAILURE/MALFUNCTION. BELL HELICOPTER TEXTRON, INC., PUBLISHED INFORMATION LETTER 206-84-41 DATED JULY 6, 1984 IN WHICH IT DESCRIBES UNANTICIPATED RIGHT YAW AS, '... THE OCCURRENCE OF AN UNCOMMANDED RIGHT YAW RATE WHICH DOES NOT SUBSIDE OF ITS OWN ACCORD AND WHICH, IF NOT CORRECTED CAN RESULT IN LOSS OF AIRCRAFT CONTROL.' THE PLT WAS IN THE POST SOLO PHASE OF HIS HELICOPTER TRAINING. ONE PASSENGER WAS ON BOARD WHEN THE ACCIDENT OCCURRED.
Full Narrative
PLT STATED THAT WHILE ON A HEADING OF 050 DEGS (WIND FROM 270 DEGS AT 5 KTS) THE ACFT BEGAN TO SHUDDER AND VEERED TO THE RIGHT. PLT ATTEMPTED REMEDIAL ACTION BUT ACFT CONTINUED DESCENDING IN A RIGHT SPIRAL TO GROUND CONTACT. EXAMINATION OF THE HELICOPTER DID NOT DISCLOSE ANY MECHANINCAL FAILURE/MALFUNCTION. BELL HELICOPTER TEXTRON, INC., PUBLISHED INFORMATION LETTER 206-84-41 DATED JULY 6, 1984 IN WHICH IT DESCRIBES UNANTICIPATED RIGHT YAW AS, '... THE OCCURRENCE OF AN UNCOMMANDED RIGHT YAW RATE WHICH DOES NOT SUBSIDE OF ITS OWN ACCORD AND WHICH, IF NOT CORRECTED CAN RESULT IN LOSS OF AIRCRAFT CONTROL.' THE PLT WAS IN THE POST SOLO PHASE OF HIS HELICOPTER TRAINING. ONE PASSENGER WAS ON BOARD WHEN THE ACCIDENT OCCURRED.
Flight
Event TypeAccident
Event Time16:30 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206B
Tail NumberN1086Y
Aircraft CategoryHeli
DamageSubstantial
OperatorTelestar
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft · 317
Seats5
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 40 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 5 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point39 C / 0 C
Altimeter0
Observation Time20:50
Weather SourcePILO