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NTSB Report
March 7, 1992 · Enstrom F28 · N95NR
Lakewood, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 7, 1992
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Lakewood, CO
Aircraft
Enstrom F28
Tail Number
N95NR
Operator
Gavit Steven E
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN92LA041
ENGINE POWER WAS LOST AND THE PILOT INITIATED AN AUTOROTATION. THE PILOT SAID HE HAD 'INDICATIONS POWER WAS NORMAL' SO HE PULLED COLLECTIVE. THE HELICOPTER IMPACTED A ROADWAY. POST ACCIDENT EXAMINATION DISCLOSED THE FLEXIBLE AIR DUCT, BETWEEN THE AIR FILTER BOX AND THE TURBOCHARGER INLET, HAD BECOME DISCONNECTED AND HAD COLLAPSED. THE CLAMP SECURING THE AIR DUCT TO THE AIR FILTER BOX WAS LOOSE AND HAD SLIPPED OFF.
NTSB Probable Cause
THE PREMATURE USE OF COLLECTIVE BY THE PILOT DURING AN AUTOROTATION. FACTORS WERE: THE DISCONNECTION AND SUBSEQUENT COLLAPSE OF THE INDUCTION AIR LINE.
Full Narrative
ENGINE POWER WAS LOST AND THE PILOT INITIATED AN AUTOROTATION. THE PILOT SAID HE HAD 'INDICATIONS POWER WAS NORMAL' SO HE PULLED COLLECTIVE. THE HELICOPTER IMPACTED A ROADWAY. POST ACCIDENT EXAMINATION DISCLOSED THE FLEXIBLE AIR DUCT, BETWEEN THE AIR FILTER BOX AND THE TURBOCHARGER INLET, HAD BECOME DISCONNECTED AND HAD COLLAPSED. THE CLAMP SECURING THE AIR DUCT TO THE AIR FILTER BOX WAS LOOSE AND HAD SLIPPED OFF.
Flight
Event TypeAccident
Event Time17:45 MST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftEnstrom F28
Tail NumberN95NR
Aircraft CategoryHeli
DamageSubstantial
OperatorGavit Steven E
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-F1AD · Reciprocating · 225
Seats3
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 49
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 5 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point52 / 27 C
Altimeter29.00 inHg
Weather SourceWIT