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NTSB Report
May 21, 1990 · Sikorsky S-58D · N94495
Juneau, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 21, 1990
Injury Outcomes
1 injury (1 serious injury), 1 uninjured
Location
Juneau, AK
Aircraft
Sikorsky S-58D
Tail Number
N94495
Operator
Alaska Skycranes
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
SEA90LA083
THE PILOT EXPERIENCED LOSS OF TAIL ROTOR CONTROL WHILE AT A HIGH HOVER WITH AN EXTERNAL LOAD OF LOGS. THE ACFT BEGAN SPINNING TO THE RIGHT AND IMPACTED THE GROUND WHILE IN A SPIN. EXAMINATION OF THE WRECKAGE REVEALED A FRACTURE OF THE NO. 3 SEGMENT OF THE TAIL ROTOR DRIVE SHAFT ASSY.
NTSB Probable Cause
THE FAILURE OF THE NUMBER 3 SEGMENT OF THE TAIL ROTOR DRIVE SHAFT ASSEMBLY.
Full Narrative
THE PILOT EXPERIENCED LOSS OF TAIL ROTOR CONTROL WHILE AT A HIGH HOVER WITH AN EXTERNAL LOAD OF LOGS. THE ACFT BEGAN SPINNING TO THE RIGHT AND IMPACTED THE GROUND WHILE IN A SPIN. EXAMINATION OF THE WRECKAGE REVEALED A FRACTURE OF THE NO. 3 SEGMENT OF THE TAIL ROTOR DRIVE SHAFT ASSY.
Flight
Event TypeAccident
Event Time15:05 AKDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSikorsky S-58D
Tail NumberN94495
Aircraft CategoryHeli
DamageDestroyed
OperatorAlaska Skycranes
Operating RulePart 133
Engines1
Engine TypeReciprocating
Engine DetailsCurtis Wright · R-1820 · Reciprocating · 1525
Seats2
People & Injuries
Injury Summary1 injury (1 serious injury), 1 uninjured
Fatal0
Serious1
Minor0
Uninjured1
Total2
Crew 1Age 30 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind250° @ 15 kt
Visibility30 sm
CeilingBroken clouds 4000 ft
Temperature / Dew Point59 / 43 C
Altimeter29.00 inHg
Observation Time19:45
Weather SourceWFAC