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NTSB Report
July 11, 1982 · Bell 212 · N59572
38 Se Barrow, AK
Overview
Report Status
Preliminary report
Event Type
Accident
Date
July 11, 1982
Injury Outcomes
3 injuries (3 minor injuries), 3 uninjured
Location
38 Se Barrow, AK
Aircraft
Bell 212
Tail Number
N59572
Operator
Kenai Air Alaska
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC82FA056
WHILE EXECUTING A PRECAUTIONARY LANDING AFTER HEARING A SCREECHING SOUND THE PLT LOST DIRECTIONAL CONTROL & THE HELICOPTER LANDED WHILE SPINNING. EXAMINATION REVEALED THAT THE PRIMARY TAIL ROTOR DRIVESHAFT QUILL COUPLING HAD FAILED. THE 204-040-604-5 FEMALE COUPLING HAD EXPERIENCED HIGH TEMPERATURES DURING OPERATION. CADIUM PLATING HAD BEGUN TO MELT ON EXTERIOR SURFACES. VISUAL OVERHEAT INDICATOR STRIPES REQUIRED BY THE COMPONENT REPAIR & OVERHAUL MANUAL WERE NOT PRESENT ON THE FEMALE COUPLING. THE 204-040-603-9 MALE COUPLING HAD EXTENSIVE HEAT & MECHANICAL DAMAGE.
Full Narrative
WHILE EXECUTING A PRECAUTIONARY LANDING AFTER HEARING A SCREECHING SOUND THE PLT LOST DIRECTIONAL CONTROL & THE HELICOPTER LANDED WHILE SPINNING. EXAMINATION REVEALED THAT THE PRIMARY TAIL ROTOR DRIVESHAFT QUILL COUPLING HAD FAILED. THE 204-040-604-5 FEMALE COUPLING HAD EXPERIENCED HIGH TEMPERATURES DURING OPERATION. CADIUM PLATING HAD BEGUN TO MELT ON EXTERIOR SURFACES. VISUAL OVERHEAT INDICATOR STRIPES REQUIRED BY THE COMPONENT REPAIR & OVERHAUL MANUAL WERE NOT PRESENT ON THE FEMALE COUPLING. THE 204-040-603-9 MALE COUPLING HAD EXTENSIVE HEAT & MECHANICAL DAMAGE.
Flight
Event TypeAccident
Event Time17:20 AHDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 212
Tail NumberN59572
Aircraft CategoryHeli
DamageSubstantial
OperatorKenai Air Alaska
Operating RulePart 135
Engines2
Engine TypeTurboshaft
Engine DetailsP & W · PT-6-T-3 · Turboshaft · 900
Seats7
People & Injuries
Injury Summary3 injuries (3 minor injuries), 3 uninjured
Fatal0
Serious0
Minor3
Uninjured3
Total6
Crew 1Age 57 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind60° @ 12 kt
Visibility20 sm
CeilingOvercast 600 ft
Temperature / Dew Point0 C
Altimeter30.00 inHg