General Information

Data Source:                          NTSB AVIATION ACCIDENT/INCIDENT DATABASE
   Report Number:                        DEN85LA101 
   Local Date:                           03/21/1985
   Local Time:                           10:00 CST
   State:                                ND    
   City:                                 GRAND FORKS                        
   Airport Name:                         GRAND FORKS INTL         
   Airport Id:                           GFK   
   Event Type:                           ACCIDENT
   Injury Severity:                      NONE   
   Report Status:                        FINAL      
   Mid Air Collision:                    NO 

Operations Information

Category of Operation:                GENERAL AVIATION       
   Aircraft Type:                        AIRPLANE       
   Aircraft Damage:                      SUBSTANTIAL      
   Phase of Flight:                      570 LANDING                                           
   Aircraft Make/Model:                  PIPER PA-18-150                 
   Operator Doing Business As:                                         
   Operator Name:                                                      
   Operator Code:                            
   Operator:                                                                       
   Owner Name:                           UNIVERSITY OF NORTH DAKOTA    

Narrative

ON MARCH 21, 1985, A PIPER PA 18 GROUND LOOPED ON LANDING RO LLOUT AT 
   GRAN FORKS, ND. THE INSTRUCTOR STATED THE AIRCRAFT ACCIDENT OCCURRED 
   WHEN HE WAS CHECKING OUT ANOTHER FLIGHT IN STRUCTOR IN THE TAILWHEEL 
   AIRPLANE. DURING THE LANDING ROLL OUT THE AIRPLANE "GOTAWAY" FROM THE 
   STUDENT INSTRUCTOR IN TH E FRONT SEAT. THE AIRPLANE GROUNDLOOPED TO THE 
   RIGHT AND BENT THE LEFT WING SPAR.

Sequence of Events

Occurrence #: 1  260 LOSS OF CONTROL - ON GROUND/WATER
   Phase of Operation: 572 LANDING - ROLL

           Findings
           Subject - Modifier - Personnel Cause/Factor

   1b.   24539(S) - 3127(M) - 4101(P)  Cause
         DIRECTIONAL CONTROL - NOT MAINTAINED - DUAL STUDENT
   2b.   24537(S) - 3140(M) - 4101(P)  Cause
         GROUND LOOP/SWERVE - UNCONTROLLED - DUAL STUDENT
   3b.   24627(S) - 3115(M) - 4103(P)  Cause
         SUPERVISION - INADEQUATE - PILOT IN COMMAND (CFI)

   Occurrence #: 2  160 DRAGGED WING, ROTOR, POD, FLOAT OR TAIL/SKID
   Phase of Operation: 572 LANDING - ROLL

           Findings
           Subject - Modifier - Personnel Cause/Factor

Probable Cause

Aircraft Information

Number of Seats:                      2  
   Aircraft Use:                         INSTRUCTIONAL      
   Type of Operation:                    14 CFR 91 
   Domestic/International:                            
   Passenger/Cargo:                                        
   Registration Number:                  2582S 
   Air Carrier Operating Certificates:   
   Aircraft Fire:                        NONE

                  Injuries
          Fatal  Serious  Minor  None
   Crew      0       0       0      2
   Pass      0       0       0      0
   Other     0       0       0      0
   Invlvd    0       0       0      2

   Landing Gear:                         TAILWHEEL-ALL FIXED
   Certificated Maximum Gross Weight:    1750
   Engine Make:                          LYCOMING     
   Engine Model:                         O-320-A2B    
   Number of Engines:                    1 
   Engine Type:                          RECIPROCATING-CARBURETOR    

Environment/Operations Information

Basic Weather Conditions:             VISUAL METEOROLOGICAL CONDITIONS (VMC)  
   Wind Direction (deg):                 320
   Wind Speed (knots):                   5
   Visibility (sm):                      10
   Visibility RVR (ft):                  0
   Visibility RVV (sm):                  0
   Cloud Height Above Ground Level (ft): 2500
   Visibility Restrictions:              NONE
   Precipitation Type:                   NONE
   Light Condition:                      DAYLIGHT
   Departure Airport Id:                     
   Departure City:                       
   Departure State:                        
   Destination Airport Id:                   
   Destination City:                     
   Destination State:                      
   Flight Plan Filed:                    NONE
   ATC Clearance:                        NONE
   VFR Approach/Landing:                 TRAFFIC PATTERN
   Event Location:                       ON AIRPORT

Pilot-in-Command

Certificates:                         AIRLINE TRANSPORT
   Ratings:
     Plane:                              SINGLE ENGINE LAND
     Non-Plane:                          NONE
     Instrument:                         AIRPLANE
   Had Current BFR:                      YES
   Months Since Last BFR:                1  
   Medical Certificate:                  CLASS 1
   Medical Certificate Validity:         VALID MEDICAL-NO WAIVERS/LIMITATIONS

              Flight Time (Hours)
   Total       :   3291  Last 24 Hrs :    3
   Make/Model  :     20  Last 30 Days:    0
   Instrument  :      0  Last 90 Days:   24
   Multi-Engine:      0  Rotorcraft  :    0

Source: National Transportation Safety Board