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NTSB Report
June 9, 1991 · Pitts S1C · N48JP
Houston, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 9, 1991
Injury Outcomes
No injuries (1 uninjured)
Location
Houston, TX
Aircraft
Pitts S1C
Tail Number
N48JP
Operator
Joseph a Pacht
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW91LA094
FOLLOWING A SERIES OF AEROBATIC MANEUVERS TO TEST THE EFFECTIVENESS OF NEW TYPE OF COMPOSITE PROPELLER THE AIRPLANE EXPERIENCED A CATASTROPHIC FAILURE OF THE PROPELLER. THE PROPELLER WAS ISSUED WITH A KIT THAT INCLUDED THE MOUNTING BOLTS. THE BOLTS PROVIDED WERE TOO LONG AND BOTTOMED OUT RESULTING IN NO TORQUE BEING APPLIED TO THE PROPELLER. THE PROPELLER WOBBLED, AND THE PROPELLER LAMINATIONS SEPARATED.
NTSB Probable Cause
THE FAILURE OF THE PROPELLER DUE TO IMPROPER INSTALLATION.
Full Narrative
FOLLOWING A SERIES OF AEROBATIC MANEUVERS TO TEST THE EFFECTIVENESS OF NEW TYPE OF COMPOSITE PROPELLER THE AIRPLANE EXPERIENCED A CATASTROPHIC FAILURE OF THE PROPELLER. THE PROPELLER WAS ISSUED WITH A KIT THAT INCLUDED THE MOUNTING BOLTS. THE BOLTS PROVIDED WERE TOO LONG AND BOTTOMED OUT RESULTING IN NO TORQUE BEING APPLIED TO THE PROPELLER. THE PROPELLER WOBBLED, AND THE PROPELLER LAMINATIONS SEPARATED.
Flight
Event TypeAccident
Event Time12:00 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPitts S1C
Tail NumberN48JP
Aircraft CategoryAir
DamageSubstantial
OperatorJoseph a Pacht
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A3A · Reciprocating · 180
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 40 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind70° @ 12 kt
Visibility12 sm
CeilingBroken clouds 13000 ft
Altimeter0
Weather SourceWIT