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NTSB Report
July 11, 1989 · Enstrom F28F · N288
Oakland, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 11, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Oakland, CA
Aircraft
Enstrom F28F
Tail Number
N288
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX89FA238
THE CERTIFICATED PRIVATE PILOT ELECTED TO CONDUCT A PRACTICE AUTOROTATION WITH TURN AND RECOVER WITH POWER. THE PILOT WAS FLYING WITH A PASSENGER. THE PILOT ALLOWED THE ROTOR RPM TO BLEED OFF AND WAS UNABLE TO RECOVER THE RPM BEFORE TOUCHDOWN. THE HELICOPTER LANDED HARD COLLAPSING THE SKID TYPE LANDING GEAR SYSTEM. THE MAIN ROTOR THEN CONTACTED THE TAILBOOM. THE HELICOPTER SLID ABOUT 100 FEET AFTER TOUCHDOWN AND ROTATED 90 DEGREES TO THE LEFT.
NTSB Probable Cause
FAILURE OF THE PILOT TO PROPERLY MAINTAIN ROTOR RPM THROUGHOUT THE AUTOROTATION.
Full Narrative
THE CERTIFICATED PRIVATE PILOT ELECTED TO CONDUCT A PRACTICE AUTOROTATION WITH TURN AND RECOVER WITH POWER. THE PILOT WAS FLYING WITH A PASSENGER. THE PILOT ALLOWED THE ROTOR RPM TO BLEED OFF AND WAS UNABLE TO RECOVER THE RPM BEFORE TOUCHDOWN. THE HELICOPTER LANDED HARD COLLAPSING THE SKID TYPE LANDING GEAR SYSTEM. THE MAIN ROTOR THEN CONTACTED THE TAILBOOM. THE HELICOPTER SLID ABOUT 100 FEET AFTER TOUCHDOWN AND ROTATED 90 DEGREES TO THE LEFT.
Flight
Event TypeAccident
Event Time13:25 PDT
Nearest AirportOakland Int'L (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftEnstrom F28F
Tail NumberN288
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-F1AD · Reciprocating · 225
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 38 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT