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NTSB Report
September 28, 1989 · Niedzielski Coot-A · N247D
Marcy, NY
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 28, 1989
Injury Outcomes
1 injury (1 fatality)
Location
Marcy, NY
Aircraft
Niedzielski Coot-A
Tail Number
N247D
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
NYC89DFA02
WITNESSES STATED THAT THE PILOT HAD BEEN FLYING HIS AMPHIBIAN AIRPLANE IN THE LOCAL AREA FOR ABOUT 1/2 HOUR BEFORE HE RETURNED TO THE TRAFFIC PATTERN AREA. THE HOMEBUILT AIRPLANE ENTERED A MIDFIELD CROSSWIND LEG AT AN ESTIMATED 800 FEET ABOVE THE GROUND. WITNESSES REPORTED THAT THEY HEARD THE ENGINE RPM INCREASE AND DECREASE AS THE AIRCRAFT CROSSED THE AIRPORT, AND THEY DESCRIBED THE WINGS 'WOBBLING' OR 'TIPPING' BACK AND FORTH. THE WITNESSES STATED THAT THE ENGINE NOISE DECREASED, THE AIRPLANE PERFORMED A SERIES OF SHALLOW BANK TURNS BEFORE THE NOSE DROPPED AND THE AIRPLANE BANKED SHARPLY TO THE RIGHT. THE AIRPLANE ENTERED A TWO TO THREE TURN SPIN AND IMPACTED THE GROUND ON AIRPORT PROPERTY. POST-ACCIDENT INVESTIGATION REVEALED THAT THE FUEL PUMP AND THE CARBURETOR FUEL SCREEN WERE CONTAMINATED WITH THE REMAINS OF SEVERAL LARGE INSECTS. THERE WAS NO EVIDENCE OF ANY OTHER PRE-IMPACT MALFUNCTION/DIFFICULTY.
NTSB Probable Cause
FUEL SYSTEM CONTAMINATION AND THE PILOT'S FAILURE TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL/SPIN.
Full Narrative
WITNESSES STATED THAT THE PILOT HAD BEEN FLYING HIS AMPHIBIAN AIRPLANE IN THE LOCAL AREA FOR ABOUT 1/2 HOUR BEFORE HE RETURNED TO THE TRAFFIC PATTERN AREA. THE HOMEBUILT AIRPLANE ENTERED A MIDFIELD CROSSWIND LEG AT AN ESTIMATED 800 FEET ABOVE THE GROUND. WITNESSES REPORTED THAT THEY HEARD THE ENGINE RPM INCREASE AND DECREASE AS THE AIRCRAFT CROSSED THE AIRPORT, AND THEY DESCRIBED THE WINGS 'WOBBLING' OR 'TIPPING' BACK AND FORTH. THE WITNESSES STATED THAT THE ENGINE NOISE DECREASED, THE AIRPLANE PERFORMED A SERIES OF SHALLOW BANK TURNS BEFORE THE NOSE DROPPED AND THE AIRPLANE BANKED SHARPLY TO THE RIGHT. THE AIRPLANE ENTERED A TWO TO THREE TURN SPIN AND IMPACTED THE GROUND ON AIRPORT PROPERTY. POST-ACCIDENT INVESTIGATION REVEALED THAT THE FUEL PUMP AND THE CARBURETOR FUEL SCREEN WERE CONTAMINATED WITH THE REMAINS OF SEVERAL LARGE INSECTS. THERE WAS NO EVIDENCE OF ANY OTHER PRE-IMPACT MALFUNCTION/DIFFICULTY.
Flight
Event TypeAccident
Event Time16:10 EDT
Nearest AirportRiverside (0nm N)
Runway14
Runway Length3500 ft
Runway Width46 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftNiedzielski Coot-A
Tail NumberN247D
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6A-335-B · Reciprocating · 180
Seats1
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 63 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT