MIA85FA153

NTSB accident investigation · Sikorsky S-58ET · Gulf Of Mexico · April 20, 1985

Accident · FatalField investigationFinal report
Date
April 20, 1985, 00:00 local (05:00 UTC)
Place
Gulf Of Mexico
Injuries
3 fatal
Damage
Destroyed
Phase of flight
Unknown
Aircraft
N65526Sikorsky S-58ET
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850420020599A
Case key
31241

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionUnknown
Operation with known deficiencies in equipment - performedPilot in commandCause
Rotorcraft flight control,swashplate assembly - fatigueCause
Rotorcraft flight control,swashplate assembly - disconnectedCause
Rotorcraft flight control,cyclic control - inoperative
Rotorcraft flight control,collective control - inoperative
Loss of control - in flightUnknown
In flight collision with terrain/waterUnknown
Terrain condition - water,rough

Analysis

The helicopter disappeared while on an overwater flt from key west, FL to ft peirce, FL. One occupant & the wreckage of the helicopter were subsequently recovered from the Gulf Of Mexico. The plt & the other occupant were not located & were presumed dead. Prior to departure, 1 of the crewmembers was overheard to say 'that didn't sound good'referring to some unusual sound at the time of shut-down. The plt told a witness they were having mechanical difficulty which they would correct in ft pierce. Another witness heard the plt state to 1 of the pax that a cap or part had fallen off & was missing. An exam of the rotating & stationary swashplates which made up the star ass'y revealed that they had separated from each other. A metallurgical exam revealed that 8 of the 12 bolts which secured the rotating star inner race to the ass'y had failed in fatigue; the other 4 bolts were missing. There was extensive damage to the belly, tail cone & pylon.

Aircraft

Registration
N65526
Reported as
Sikorsky S-58ET
Category
Helicopter
Serial number
58-750
Airframe hours
4,548
Engine
P&W PT6T-3, 750 horsepower, turbo shaft
Damage
Destroyed
Flight
Positioning · Part 91
Registered owner
Carson Helicopters, Inc.
Airworthiness certificate
Standard, Normal
Departed
EYW · Key West, FL
Destination
FPR · Ft. Pierce, FL

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
37
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
8,800 total · 2,800 in this make and model · 7,843 as pilot in command · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 63 °F
Altimeter
30.00 inHg
Observed at
EYW, 57 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.