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NTSB Report
May 13, 1990 · Enstrom F-28A · N9056
Marathon, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 13, 1990
Injury Outcomes
No injuries (3 uninjured)
Location
Marathon, FL
Aircraft
Enstrom F-28A
Tail Number
N9056
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA90LA120
THE SIGHTSEEING HELICOPTERS HAD JUST TAKEN OFF AND WAS ABOUT 50 FT IN THE AIR WHEN TAIL ROTOR DRIVE AND CONTROL WAS LOST. THE PILOT EXECUTED A POWER ON FORCED LANDING TO THE OCEAN THE TAIL ROTOR GEAR BOX FAILED AT THE CASTING AROUND THE INPUT DRIVE GEAR AND THERE WERE SIGNS OF LOGJAMMING ON THE INTERIOR OF THE CASTING. THE DRIVE GEAR WAS NOT RECOVERED FROM THE OCEAN.
NTSB Probable Cause
FAILURE OF THE INPUT DRIVE GEAR OF THE TAIL ROTOR GEAR BOX FOR UNDETERMINED REASONS BECAUSE THE DRIVE GEAR WAS NOT RECOVERED FROM THE OCEAN.
Full Narrative
THE SIGHTSEEING HELICOPTERS HAD JUST TAKEN OFF AND WAS ABOUT 50 FT IN THE AIR WHEN TAIL ROTOR DRIVE AND CONTROL WAS LOST. THE PILOT EXECUTED A POWER ON FORCED LANDING TO THE OCEAN THE TAIL ROTOR GEAR BOX FAILED AT THE CASTING AROUND THE INPUT DRIVE GEAR AND THERE WERE SIGNS OF LOGJAMMING ON THE INTERIOR OF THE CASTING. THE DRIVE GEAR WAS NOT RECOVERED FROM THE OCEAN.
Flight
Event TypeAccident
Event Time11:30 EDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftEnstrom F-28A
Tail NumberN9056
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360 · Reciprocating · 205
Seats3
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 62 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 8 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter29.00 inHg
Observation Time14:55