Helicopter UH-1H 68-15464

Information on U.S. Army helicopter UH-1H tail number 68-15464
The Army purchased this helicopter 0369
Total flight hours at this point: 00001775
Date: 11/10/1970
Accident case number: 701110121
Unit: 134 AHC
The station for this helicopter was Tuy Hoa in South Vietnam
Number killed in accident = 0 . . Injured = 0 . . Passengers = 0
costing 38455
Original source(s) and document(s) from which the incident was created or updated: Defense Intelligence Agency Helicopter Loss database. Army Aviation Safety Center database. Also: OPERA (Operations Report. )
Loss to Inventory

Crew Members:
AC W2 GROCE HV
P W1 EDWARDS JD

Accident Summary:

 THE PURPOSE OF THE FLIGHT WAS TO PERFORM A VIBRATION CHECK OF A NEW ENGINE INSTALLED BY THE 79TH TRANS. CO. AT QUI NHON, RVN. THE 79TH HAD PERFORMED A TEST FLIGHT BUT FAILED TO INCLUDE THE RESULTS OF THE VIBRATION CHECK AND ENGINE TOPPING CHART IN THE TEST FLIGHT THEY PERFORMED. WO1 EDWARDS MADE THE RUN-UP AND GROUND CHECK OF THE AIRCRAFT. CW2 GROCE SUPERVISED THE ENGINE MAN INSTALLING THE LEADS ON THE VIBRATION METER. WO1 EDWARDS WAS THE PILOT IN CONTROL OF THE AIRCRAFT THROUGHOUT THE ENTIRE FLIGHT. AFTER RECEIVING CLEARANCE FROM THE TOWER HE TOOK OFF USING THE 03 TAXIWAY. WHILE CLIMBING OUT AT 180' AGL AND 70 KNOTS IAS WO1 EDWARDS ELECTED TO MAKE A HYDRAULIC CHECK. THIS MANEUVER WAS NOT CONDUCTED IN ACCORDANCE WITH STANDARD TEST FLIGHT PROCEDURES. WO1 EDWARDS INSTRUCTED CW2 GROCE TO TURN OFF THE HYDRAULIC SWITCH. CW2 GROCE INFORMED WO1 EDWARDS HE WAS TURNING OFF THE HYDRAULIC SWITCH AT THAT TIME AND WO1 EDWARDS PUT THE COLLECTIVE FULL DOWN AND DISCOVERED HE STILL HAD HYD ASSIST AND INFORMED CW2 GROCE HE STILL HAD HYDRAULICS. AT THIS TIME WO1 EDWARDS PULLED IN COLLECTIVE PITCH AND CW2 GROCE REACHED TO RECYCLE THE HYDRAULIC SWITCH AND NOTED THE RPM PASSING THROUGH 6200 AND INFORMED WO1 EDWARDS TO BOTTOM COLLECTIVE PITCH. AT APPROXIMATELY 80' AGL AND 70 KNOTS IAS, WO1 EDWARDS STARTED A DECELERATION TO SLOW HIS FORWARD AIRSPEED, AT APPROXIMATELY 20' AGL 45 KNOTS IAS PULLED INITIAL COLLECTIVE PITCH. DUE TO THE LOW ROTOR RPM, APPROXIMATELY 225, THE AIRCRAFT HAD A HIGH SINK RATE AND HIT IN A TAIL LOW ATTITUDE AND LEVELED SKIDS. THE TAIL BOOM AND STINGER HAD CONTACT WITH THE TAXIWAY FOR 28'7" BEFORE THE SKIDS MADE CONTACT. THE SKIDS ON CONTACT SPREAD AND THE BELLY OF THE AIRCRAFT CONTACTED THE TAXIWAY SLIDING FOR 45 FEET, THEN WENT AIRBORNE FOR 42 FEET, SLID 44 FEET ALIGNED WITH TAXIWAY AND STARTED A SLOW TURN TO THE LEFT. WHEN THE AIRCRAFT STARTED A SLOW TURN WO1 EDWARDS APPLIED FULL LEFT CYCLIC CAUSING THE MAIN ROTOR TO STRIKE THE PAVEMENT AND MAST BUMPING TO OCCUR. THE AIRCRAFT CONTINUED SLIDING ALIGNED ON THE TAXIWAY IN A SLOW TURN AND 2( FEET FROM INITIAL MAIN ROTOR BLADE CONTACT, THE SECOND STRIKE OCCURRED AND THE MAIN ROTOR STRUCK THE TAIL BOOM SEVERING A PORTION OF THE TAIL BOOM AND TAIL ROTOR DRIVE SHAFT WHICH WAS FOUND 124 FEET FROM THIS POINT. AT 215 FEET FROM THE INITIAL POINT OF CONTACT A WHIRD MAIN ROTOR BLADE STRIKE OCCURRED COMPLETELY SEVERING THE TAIL BOOM, THE VERTICAL FIN AND TAIL ROTOR FELL TO THE GROUND AT THAT POINT AND SLID FOR 78 FEET AND STOPPED. THE AIRCRAFT CAME TO REST UPRIGHT HEADED 280 DEGREES AND 353 FEET 2 INCHES FROM THE INITIAL CONTACT POINT. WHEN THE ROTOR BLADES STOPPED TURNING WO1 EDWARDS TURNED OFF THE BATTERY AND NOTED THE MAIN FUEL SWITCH WAS TURNED OFF. THE CREW THEN EXITED THE AIRCRAFT.\\


The following is Goldbook information on US Army helicopter UH-1H tail number 68-15464
It is provided here as an ESTIMATE of the history of this helicopter and is not intended to be the final authority.
This helicopter was purchased by the US Army in 0369.
Please provide any additional information on this helicopter to the VHPA.

DATE  FLT HRS    UIC      UNIT          AREA          POST          COUNTRY
6903   0    0 W0Y6AA OS TO CONUS      ITR CONUS                   AVCOMITR
6904  56   56 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6905 134  190 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6906 133  323 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6907 132  455 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6908 115  570 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6909 100  670 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6910 101  771 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6911 102  873 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
6912  97  970 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7001  79 1049 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7002  59 1108 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7003 115 1223 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7004  40 1263 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7005  99 1362 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7006 128 1490 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7007 190 1680 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7008  13 1693 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7009  41 1734 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7010  40 1774 WC07AA 134 ASLT HEL CO  VIETNAM                     RVN     
7011   1 1775 WC5CAA 604 TRANS CO     VIETNAM                     RVN     
7012   0 1775 WCLNAA 79 TRANS CO      VIETNAM                     RVN     
7101   0 1775 WCLNAA 79 TRANS CO      VIETNAM                     RVN     
7102   0 1775 WCLNAA 79 TRANS CO      VIETNAM                     RVN     


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Painted Post, NY 14870


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Printed from databases on: 05/20/2000

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