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NTSB Report
September 7, 1992 · Curt Hoffstad Pitts S1-S · N90LB
Council Bluffs, IA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 7, 1992
Injury Outcomes
1 injury (1 minor injury)
Location
Council Bluffs, IA
Aircraft
Curt Hoffstad Pitts S1-S
Tail Number
N90LB
Operator
Parmley Aviation
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI92DCD10
THE PILOT OF THE ACCIDENT AIRPLANE WAS PERFORMING A LOW LEVEL AEROBATIC ROUTINE AT AN AIRSHOW. WITNESSES OBSERVED THE AIRPLANE ENTER A FLAT SPIN FOLLOWING A VERTICAL CLIMB. THE PILOT WAS ABLE TO STOP THE SPIN ROTATION BUT WAS UNABLE TO RETURN TO LEVEL FORWARD FLIGHT BEFORE COLLIDING WITH TERRAIN.
NTSB Probable Cause
THE FAILURE OF THE PILOT TO MAINTAIN AIRCRAFT CONTROL WHILE MANEUVERING DURING AEROBATIC FLIGHT.
Full Narrative
THE PILOT OF THE ACCIDENT AIRPLANE WAS PERFORMING A LOW LEVEL AEROBATIC ROUTINE AT AN AIRSHOW. WITNESSES OBSERVED THE AIRPLANE ENTER A FLAT SPIN FOLLOWING A VERTICAL CLIMB. THE PILOT WAS ABLE TO STOP THE SPIN ROTATION BUT WAS UNABLE TO RETURN TO LEVEL FORWARD FLIGHT BEFORE COLLIDING WITH TERRAIN.
Flight
Event TypeAccident
Event Time14:32 CDT
Nearest AirportCouncil Bluffs Muni Airpt (0nm)
Runway31
Runway Length4100 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCurt Hoffstad Pitts S1-S
Tail NumberN90LB
Aircraft CategoryAir
DamageSubstantial
OperatorParmley Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360 · Reciprocating · 180
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 46 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 12 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point66 F
Altimeter29.00 inHg
Observation Time18:52
Weather SourceWFAC