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NTSB Report
September 3, 1989 · Bell 47G-2 · N37870
Cayey, PR
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 3, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Cayey, PR
Aircraft
Bell 47G-2
Tail Number
N37870
Operator
Martinez Juan
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA89LA240
THE PVT PLT HAD A SINGLE ENG LAND RATING & WAS TRAINING AS A STUDENT FOR A HELICOPTER RATING. WHILE ON A LOCAL FLT AT ABOUT 300 FT AGL, HE NOTED A DECREASE IN ROTOR RPM. HE RPRTD THAT HE TRIED TO INCREASE THE RPM BY ADVANCING THE THROTTLE, BUT THERE WAS NO RESPONSE. SUBSEQUENTLY, THE PLT LANDED THE HELICOPTER IN TREES, WHEN HE WAS UNABLE TO REACH A CLEARING. NO REASON WAS FOUND FOR THE RPRTD LOSS OF POWER.
NTSB Probable Cause
LOSS OF ENGINE POWER FOR AN UNKNOWN REASON. A FACTOR RELATED TO THE ACCIDENT WAS: THE PRESENCE OF TREES IN THE EMERGENCY LANDING AREA.
Full Narrative
THE PVT PLT HAD A SINGLE ENG LAND RATING & WAS TRAINING AS A STUDENT FOR A HELICOPTER RATING. WHILE ON A LOCAL FLT AT ABOUT 300 FT AGL, HE NOTED A DECREASE IN ROTOR RPM. HE RPRTD THAT HE TRIED TO INCREASE THE RPM BY ADVANCING THE THROTTLE, BUT THERE WAS NO RESPONSE. SUBSEQUENTLY, THE PLT LANDED THE HELICOPTER IN TREES, WHEN HE WAS UNABLE TO REACH A CLEARING. NO REASON WAS FOUND FOR THE RPRTD LOSS OF POWER.
Flight
Event TypeAccident
Event Time17:30 AST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 47G-2
Tail NumberN37870
Aircraft CategoryHeli
DamageSubstantial
OperatorMartinez Juan
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-435-A · Reciprocating · 260
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 38 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind100° @ 8 kt
Visibility12 sm
CeilingBroken clouds 25000 ft
Altimeter29.00 inHg
Observation Time22:00
Weather SourceWFAC