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NTSB AVIATION ACCIDENT/INCIDENT DATABASE REPORT


General Information

Data Source:                          NTSB AVIATION ACCIDENT/INCIDENT DATABASE
   Report Number:                        CHI93LA159 
   Local Date:                           05/05/1993
   Local Time:                           11:45 CDT
   State:                                ND    
   City:                                 GRAND FORKS                        
   Airport Name:                                                  
   Airport Id:                           6NA9  
   Event Type:                           ACCIDENT
   Injury Severity:                      MINOR  
   Report Status:                        FINAL      
   Mid Air Collision:                    NO 

Operations Information

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

Narrative

THE PILOT WAS PRACTICING LANDINGS WHEN THE ACCIDENT OCCURRE D.  THE 
   PILOT STATED HE LOWERED THE COLLECTIVE AND CENTERED THE CYCLIC IN ORDER 
   TO STOP A GROUND RUN DURING THE LANDING. THE HELICOPTER BEGAN TO 
   VIBRATE AND THE PILOT BROUGHT THE CYCLIC BACK TO CENTER, ROLLED OFF THE 
   THROTTLE AND VERIFIED THAT THE COLLECTIVE WAS LOWERED.  THE HELICOPTER 
   CONTINUED TO SHAKE WITH THE BLADES STRIKING THE GROUND.  THE SADDLE FU 
   EL TANK SEPARATED FROM THE HELICOPTER AND A FIRE WAS INITIATED.  THE 
   PILOT WAS ABLE TO EVACUATE THE HELICOPTER PR IOR TO ITS BEING CONSUMED 
   BY FIRE. POST ACCIDENT INSPECTION OF HELICOPTER AND ITS COMPONENTS NOT 
   DESTROYED IN THE FIRE FAILED TO REVEAL ANY FAILURE/MALFUNCTION WHICH 
   WOULD HAVE RESULTED IN THE ACCIDENT.

Sequence of Events

Occurrence #: 1  260 LOSS OF CONTROL - ON GROUND/WATER
   Phase of Operation: 571 LANDING - FLARE/TOUCHDOWN

           Findings
           Subject - Modifier - Personnel Cause/Factor

   1b.   24559(S) - 3135(M) - 4000(P)
         RUN ON LANDING - PERFORMED - PILOT IN COMMAND
   2b.   24542(S) - 3115(M) - 4000(P)
         REMEDIAL ACTION - INADEQUATE - PILOT IN COMMAND
   3b.   23202(S) - 3134(M) - 4000(P)  Cause
         COLLECTIVE - NOT USED - PILOT IN COMMAND

   Occurrence #: 2  320 ON GROUND/WATER ENCOUNTER WITH TERRAIN/WATER
   Phase of Operation: 571 LANDING - FLARE/TOUCHDOWN

           Findings
           Subject - Modifier - Personnel Cause/Factor


Probable Cause

THE PILOT'S IMPROPER USE OF COLLECTIVE IN RECOVERING FROM A LOSS OF 
   CONTROL DUE TO GROUND RESONANCE.

Aircraft Information

Number of Seats:                      2  
   Aircraft Use:                         INSTRUCTIONAL      
   Type of Operation:                    14 CFR 91 
   Domestic/International:                            
   Passenger/Cargo:                                        
   Registration Number:                  7504D 
   Air Carrier Operating Certificates:   
   Aircraft Fire:                        ON GROUND

                  Injuries
          Fatal  Serious  Minor  None
   Crew      0       0       1      0
   Pass      0       0       0      0
   Other     0       0       0      0
   Invlvd    0       0       1      0

   Landing Gear:                         SKID
   Certificated Maximum Gross Weight:    2050
   Engine Make:                          LYCOMING     
   Engine Model:                         HIO-360-S1A  
   Number of Engines:                    1 
   Engine Type:                          RECIPROCATING-FUEL INJECTED 

Environment/Operations Information

Basic Weather Conditions:             VISUAL METEOROLOGICAL CONDITIONS (VMC)  
   Wind Direction (deg):                 180
   Wind Speed (knots):                   5
   Visibility (sm):                      15
   Visibility RVR (ft):                  0
   Visibility RVV (sm):                  0
   Cloud Height Above Ground Level (ft): 25000
   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:                         PRIVATE
   Ratings:
     Plane:                              SINGLE ENGINE LAND
     Non-Plane:                          HELICOPTER
     Instrument:                         NONE
   Had Current BFR:                      
   Months Since Last BFR:
   Medical Certificate:                  CLASS 1
   Medical Certificate Validity:         VALID MEDICAL-NO WAIVERS/LIMITATIONS

              Flight Time (Hours)
   Total       :    172  Last 24 Hrs :    1
   Make/Model  :     95  Last 30 Days:   13
   Instrument  :    112  Last 90 Days:   29
   Multi-Engine:      0  Rotorcraft  :    0