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NTSB Report
July 13, 1991 · Piper PA22/20 · N5968D
Stevens Point, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 13, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Stevens Point, WI
Aircraft
Piper PA22/20
Tail Number
N5968D
Operator
R H Rettler & Associates
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI91LA217
THE TRICYCLE LANDING GEAR AIRPLANE WAS CONVERTED TO A CONVENTIONAL GEAR CONFIGURATION USING A SUPPLEMENTAL TYPE CERTIFICATE (STC). DURING A LANDING ROLLOUT THE AIRPLANE BEGAN TO TURN TO THE LEFT. ATTEMPTS BY THE PILOT AND INSTRUCTOR TO STOP THE TURN WERE UNSUCCESSFUL. THE AIRPLANE DEPARTED THE RUNWAY AND GROUNDLOOPED. AND INVESTIGATION REVEALED THAT THE RIGHT RUDDER CABLE BELLCRANK TORQUE TUBE HAD FAILED. THE RUDDER PEDAL ASSEMBLY AND BROKEN PART DID NOT CONFORM TO THE STC DESIGN.
NTSB Probable Cause
THE IMPROPER INSTALLATION OF THE FLIGHT CONTROL SYSTEM RUDDER CONTROL ROD (RUDDER CABLE BELLCRANK TORQUE TUBE) BY MAINTENANCE PERSONNEL. A FACTOR CONTRIBUTING TO THIS ACCIDENT WAS THE INOPERATIVE TAILWHEEL STEERING.
Full Narrative
THE TRICYCLE LANDING GEAR AIRPLANE WAS CONVERTED TO A CONVENTIONAL GEAR CONFIGURATION USING A SUPPLEMENTAL TYPE CERTIFICATE (STC). DURING A LANDING ROLLOUT THE AIRPLANE BEGAN TO TURN TO THE LEFT. ATTEMPTS BY THE PILOT AND INSTRUCTOR TO STOP THE TURN WERE UNSUCCESSFUL. THE AIRPLANE DEPARTED THE RUNWAY AND GROUNDLOOPED. AND INVESTIGATION REVEALED THAT THE RIGHT RUDDER CABLE BELLCRANK TORQUE TUBE HAD FAILED. THE RUDDER PEDAL ASSEMBLY AND BROKEN PART DID NOT CONFORM TO THE STC DESIGN.
Flight
Event TypeAccident
Event Time14:40 CDT
Nearest AirportStevens Point (0nm N)
Runway3
Runway Length6028 ft
Runway Width120 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA22/20
Tail NumberN5968D
Aircraft CategoryAir
DamageSubstantial
OperatorR H Rettler & Associates
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-A2B · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 25 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind300°
Visibility7 sm
CeilingOvercast 9000 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time18:55
Weather SourceWFAC