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NTSB Report
June 20, 1991 · Sikorsky 58H · N4582B
Corsicana, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 20, 1991
Injury Outcomes
No injuries (6 uninjured)
Location
Corsicana, TX
Aircraft
Sikorsky 58H
Tail Number
N4582B
Operator
Bradford S Ladue
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW91LA105
THE HELICOPTER WAS IN CRUISE FLIGHT OVER A LAKE WHEN AN ENGINE POWER LOSS OCCURRED. THE PILOT ENTERED AUTOROTATION AND MANEUVERED DOWNWIND TOWARD THE SHORE LINE. THE HELICOPTER LANDED HARD AND THE RIGHT MAIN GEAR STRUT COLLAPSED, PENETRATING THE FUSELAGE. ENGINE EXAMINATION SHOWED A TOTAL FAILURE OF THE MAGNETO. IT HAD RECENTLY UNDERGONE REPAIR AND INSPECTION AT AN ENGINE SHOP.
NTSB Probable Cause
FAILURE OF THE MAGNETO. FACTORS WERE THE HELICOPTER'S POSITION OVER WATER, THE TAILWIND, AND THE INADEQUATE MAIN ROTOR RPM PRIOR TO TOUCHDOWN.
Full Narrative
THE HELICOPTER WAS IN CRUISE FLIGHT OVER A LAKE WHEN AN ENGINE POWER LOSS OCCURRED. THE PILOT ENTERED AUTOROTATION AND MANEUVERED DOWNWIND TOWARD THE SHORE LINE. THE HELICOPTER LANDED HARD AND THE RIGHT MAIN GEAR STRUT COLLAPSED, PENETRATING THE FUSELAGE. ENGINE EXAMINATION SHOWED A TOTAL FAILURE OF THE MAGNETO. IT HAD RECENTLY UNDERGONE REPAIR AND INSPECTION AT AN ENGINE SHOP.
Flight
Event TypeAccident
Event Time16:30 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSikorsky 58H
Tail NumberN4582B
Aircraft CategoryHeli
DamageSubstantial
OperatorBradford S Ladue
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsWright · R-1820-84C · Reciprocating · 1525
Seats6
People & Injuries
Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 39 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 11 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter29.00 inHg
Weather SourceWIT