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NTSB Report
June 17, 1988 · Bell 206L-1 · N114FH
Springtown, PA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 17, 1988
Injury Outcomes
2 injuries (2 fatalities)
Location
Springtown, PA
Aircraft
Bell 206L-1
Tail Number
N114FH
Operator
Fleet Helicopter Services
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
NYC88FA166
WHILE IN CRUISE FLIGHT, GROUND WITNESSES OBSERVED THE HELICOPTER MAKE TWO VIOLENT ROLL MANEUVERS FOLLOWED BY AN IN-FLIGHT BREAKUP. AIRCRAFT WRECKAGE WAS SPREAD OVER AN AREA OF APPROXIMATELY 10 ACRES. EXAMINATION OF THE WRECKAGE REVEALED THAT THE COLLECTIVE IDLER LINK AND RETAINING PIN ASSEMBLY WERE MISSING AND THE LOWER ATTACHING STUD OF THE IDLER LINK SHOWED EVIDENCE OF FAILURE. THE STUD WAS BENT IN THE DIRECTION OPPOSITE TO THE DIRECTION OF ROTATION AND SHEARED NUT THREADS AND COTTER PIN REMAINS WERE FOUND IN THE STUD THREADS AND COTTER PIN HOLE, RESPECTIVELY. THE H-SHAPED IDLER LEVER THAT CONNECTS THE UPPER END OF THE IDLER LINK TO THE SWASHPLATE DRIVE COLLAR WAS FOUND ATTACHED TO THE COLLAR AND SHOWED NO EVIDENCE OF DISTRESS. IT COULD NOT BE DETERMINED WHY THE RETAINING PIN CONNECTING THE COLLECTIVE IDLER LINK TO THE IDLER LEVER SEPARATED.
Full Narrative
WHILE IN CRUISE FLIGHT, GROUND WITNESSES OBSERVED THE HELICOPTER MAKE TWO VIOLENT ROLL MANEUVERS FOLLOWED BY AN IN-FLIGHT BREAKUP. AIRCRAFT WRECKAGE WAS SPREAD OVER AN AREA OF APPROXIMATELY 10 ACRES. EXAMINATION OF THE WRECKAGE REVEALED THAT THE COLLECTIVE IDLER LINK AND RETAINING PIN ASSEMBLY WERE MISSING AND THE LOWER ATTACHING STUD OF THE IDLER LINK SHOWED EVIDENCE OF FAILURE. THE STUD WAS BENT IN THE DIRECTION OPPOSITE TO THE DIRECTION OF ROTATION AND SHEARED NUT THREADS AND COTTER PIN REMAINS WERE FOUND IN THE STUD THREADS AND COTTER PIN HOLE, RESPECTIVELY. THE H-SHAPED IDLER LEVER THAT CONNECTS THE UPPER END OF THE IDLER LINK TO THE SWASHPLATE DRIVE COLLAR WAS FOUND ATTACHED TO THE COLLAR AND SHOWED NO EVIDENCE OF DISTRESS. IT COULD NOT BE DETERMINED WHY THE RETAINING PIN CONNECTING THE COLLECTIVE IDLER LINK TO THE IDLER LEVER SEPARATED.
Flight
Event TypeAccident
Event Time18:45 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206L-1
Tail NumberN114FH
Aircraft CategoryHeli
DamageDestroyed
OperatorFleet Helicopter Services
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C28B · Turboshaft · 500
Seats7
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 43 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT