NYC84FU006

NTSB accident investigation · Pterodactyl Pfledgling · Canandaigua, NY · July 2, 1984

Accident · FatalFinal report
Date
July 1, 1984, 20:50 local (Jul 2, 1984, 00:50 UTC)
Place
Canandaigua, NY
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
UNREGPterodactyl Pfledgling
Weather
Visual (VMC) · Dusk
Status
Completed
Report
Approved by Office Director
Case key
35433

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Light condition - duskFactor
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
Remedial action - initiatedPilot in command
Airframe/component/system failure/malfunctionOther
Wing - overload
Design stress limits of aircraft - exceededPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

During takeoff, the ultralight vehicle was observed to enter a steep climb. A witness stated that when it was climbing over the midpoint of the rwy, it entered a steep dive. The plt recovered from the descent & began another steep climb. After reaching about 250 to 300 ft, the ultralight entered another steep dive. Again, the plt started to recover; however, during the pull-out, the left wing buckled, then the vehicle descended to the ground & crashed. No pre-accident fatigue failure or part malfunction was found.

Aircraft

Registration
UNREG
Reported as
Pterodactyl Pfledgling
Category
Ultralight, amateur-built
Engine
Cuyuna 430-D, 30 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 103
Operator
David S. Schlenker
Destination
Bloomfield, NY
Airport
Canandaigua, runway 34, 1,900 × 100 ft, grass/turf

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
24
Airplane ratings
Single-engine land
Medical
Unknown, Unknown
Seat
Center
Toxicology
Performed
Flight hours
50 in this make and model

Weather

Conditions
Visual (VMC) · Dusk
Wind
Calm
Visibility
12 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 57 °F
Observed at
ROC