. AIRCRAFT LOST ALL ENGINE OIL IN FLIGHT DUE TO HOLE IN ENGINE OIL COOLER. OIL COOLER WAS PUNCTURED BY A BRANCH WHEN AIRCRAFT WENT INTO AN LZ FILLED WITH SMALL BUSHES EARLIER IN THE FLIHGT.\\
Information on U.S. Army helicopter UH-1H tail number 66-16467
The Army purchased this helicopter 0567
Total flight hours at this point: 00003836
Date: 11/15/1971
Accident case number: 711115051
Unit: 117 AHC
The station for this helicopter was Plantation in
Number killed in accident = 0 . . Injured = 0 . . Passengers = 2
costing 32255
Source(s) from which the incident was created or updated: Army Aviation Safety Center database.
Crew Members:
AC W1 KELLY DM
P O2 VAN SLYCK DR
CE E4 HENDERSON NR
G E4 VONDERAHE CA
Passengers:
.
, GM, G;
O4 CJ MIX, LCO, G;
Accident Summary:
. ^WO1 KELLY^ ACTING IN HIS CAPACITY AS AC AND ^1LT VAN SLYCK^ ACTING AS PILOT WERE ASSIGNED A DCS MISSION IN SUPPORT OF OPERATIONS AT QUAN LOI, RVN ON 15 NOVEMBER 1971. AT APPROXIMATELY 0530 HRS ON THE MORNING OF 15 NOVEMBER 1971, ^WO1 KELLY^ AND ^1LT VAN SLYCK^ PERFORMED AN ADEQUATE PREFLIGHT OF THEIR AIRCRAFT (66-16467). AT 0700 THEY DEPARTED PLANTATION FOR QUAN LOI AND ARRIVED AT THEIR DESTINATION ABOUT 0800 HRS AT WHICH TIME THEY SHUT THEIR AIRCRAFT DOWN. DURING THE NEXT THREE (3) HRS THEY WERE GIVEN TWO MISSIONS TO FLY BACK AND FORTH TO LOC NINH, BUT ULTIMATELY SHUT DOWN AGAIN AT QUAN LOI AT 1100 HRS. DURING THESE MISSIONS THEY EXPERIENCED NO OPERATIONAL DIFFICULTIES WITH THE AIRCRAFT. THEY ALSO CHECKED ALL OIL LEVELS AND ROTOR HUBS AFTER EACH PARTICULAR PHASE OF FLIGHT. AT APPROXIMATELY 1130 HRS THEY WERE CALLED OUT AGAIN TO PERFORM A MEDEVAC FOR A DOWNED HELICOPTER CREW (VNAF) APPROXIMATELY 5NM FROM LOC NINH. THEY PICKED UP THREE (3) CREW MEMBERS AND DEPARTED THE AREA ENROUTE TO BIEN HOA. WHILE ENROUTE THEY RECEIVED INSTRUCTIONS TO CHANGE THEIR DESTINATION AND DELIVER THEIR PASSENGERS TO TAN SON NHUT AFB FOR MEDICAL ATTENTION. AT 1212 HRS, APPROXIMATELY 5 NM NORTH OF TAN SON NHUT, AT AN ALTITUDE OF 2000' MSL, AN AIRSPEED OF 80 KTS, AND A HEADING OF 180 DEGREES, THE AIRCRAFT EXPERIENCED A HIGH FREQUENCY VIBRATION AND EXTREMELY LOUD GRINDING NOISES COMING FROM THE TRANSMISSION AREA. ^WO1 KELLY^ ASSUMED THE AIRCRAFT HAD A TRANSMISSION FAILURE AND LOWERED THE PITCH. THE AIRCRAFT DESCENDED AT A RATE OF 500 FPM. DURING THIS TIME A MAYDAY CALL WAS MADE BY WO1 KELLY AND ^1LT VAN SLYCK^ LOCKED BOTH SHOULDER HARNESSES AND MONITORED ALL INSTRUMENTS. BOTH AC AND PILOT SAW NO ABNORMAL INDICATIONS ON THE INSTRUMENT PANEL BUT CONTINUED THEIR DESCENT. ^WO1 KELLY^ DETERMINED AT APPROXIMATELY 50 FT AGL THAT HIS APPROACH WAS SHALLOW AND FAST. HE BEGAN TO INITIATE A DECELERATION FROM 80 KTS. AT 10 - 15 FT AGL THE NOSE BEGAN TO YAW TO THE RIGHT AND HE APPLIED LEFT PEDAL, HOWEVER THE AIRCRAFT DID NOT RESPOND. HE HIT A MARSHY AREA HEELS FIRST AT A 45 DEGREE ANGLE TO HIS FLIGHT PATH SKIDDING APPROXIMATELY 10 FEET. DURING THE SKID, THE AIRCRAFT TURNED TO THE RIGHT ANOTHER 45 DEGREES. ALL CREWMEMBERS EXITED THE AIRCRAFT WITHOUT SHUTTING THE AIRCRAFT DOWN. AFTER ALL INDIVIDUALS WERE OUT AND IT WAS DETERMINED THAT THE AIRCRAFT WOULD NOT EXPLODE, 1LT VAN SLYCK RETURNED TO THE AIRCRAFT AND SHUT IT DOWN. COMMUNICATIONS ABOARD THE AIRCRAFT WERE USED TO NOTIFY THE PROPER AUTHORITIES. THERE WAS NO FIRE, THE AIRCRAFT REMAINED UPRIGHT, AND THERE WERE NO INJURIES A QUICK INSPECTION WAS PERFORMED AND IT WAS DETERMINED THAT THE NO. 1 HANGER BEARING HAD FAILED RATHER THAN THE TRANSMISSION.\\
The following is Goldbook
information on US Army helicopter UH-1H tail number 66-16467
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 0567.
Please provide any additional information on this helicopter to the VHPA.
DATE FLT HRS UIC UNIT AREA POST COUNTRY 6705 0 0 W0Y6AA TRAN MDMHELCO S ALASKA ALASKA 6706 23 23 WQ4VAA 92 AVN CO 5TH ARMY FORT CARSON 5TH ARMY 6707 22 45 WQ4VAA 92 AVN CO 5TH ARMY FORT CARSON 5TH ARMY 6708 27 72 WQ4VAA 92 AVN CO 5TH ARMY FORT CARSON 5TH ARMY 6709 24 96 WQ4VAA 92 AVN CO 5TH ARMY FORT CARSON 5TH ARMY 6710 0 96 WQ4VAA 92 AVN CO 5TH ARMY FORT CARSON 5TH ARMY 6711 4 100 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6712 67 167 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6801 101 268 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6802 63 331 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6803 83 414 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6804 83 497 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6805 88 585 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6806 79 664 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6807 152 816 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6808 84 900 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6809 117 1017 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6810 101 1118 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6811 102 1220 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6812 100 1320 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6901 99 1419 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6902 100 1519 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6903 98 1617 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6904 66 1683 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6905 122 1805 W1X6AA UNIT NOT KNOWN VIETNAM RVN 6906 93 1898 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6907 125 2023 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6908 102 2125 WAX6AA 92 ASLT HEL CO VIETNAM RVN 6909 250 2375 WC5EAA 608 TRANS CO VIETNAM RVN 6910 0 2375 WC5EAA 608 TRANS CO VIETNAM RVN 6911 0 2375 WCLNAA 79 TRANS CO VIETNAM RVN 6912 0 2375 8003 HHD 44 ENG GP THAILAND PACIFIC 7001 0 2375 8003 7 CORPS SPT COM GERMANY EUROPE 7002 0 2375 8003 7 CORPS SPT COM GERMANY EUROPE 7003 0 2377 8003 7 CORPS SPT COM GERMANY EUROPE 7004 0 2377 8003 7 CORPS SPT COM GERMANY EUROPE 7005 0 2377 W0MCAA RED RIVER AD 4TH ARMY RED RIVER AD AMC 7006 0 2377 W0MCAA RED RIVER AD 4TH ARMY RED RIVER AD AMC 7007 4 2381 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7008 103 2484 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7009 96 2580 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7010 99 2679 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7011 100 2779 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7012 70 2849 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7101 96 2945 WAX8AA 117 AHC VIETNAM RVN 7102 91 3036 WAX8AA 117 AHC VIETNAM RVN 7103 101 3137 WAX8AA 117 AHC VIETNAM RVN 7104 93 3230 WAX8AA 117 AHC VIETNAM RVN 7105 83 3313 WAX7AA 114 AHC VIETNAM RVN 7106 84 3397 WAX7AA 114 AHC VIETNAM RVN 7107 84 3481 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7108 90 3571 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7109 95 3666 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7110 121 3787 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7111 49 3836 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7112 1 3837 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7201 103 3940 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7202 112 4052 WAX8AA 117 ASLT HEL CO VIETNAM RVN 7203 0 4052 W0Y6AA OS TO CONUS ITR CONUS AVSCOM 7204 0 4052 W0Y6AA OS TO CONUS ITR CONUS AVSCOM 7205 0 4052 W0Y6AA OS TO CONUS ITR CONUS AVSCOM 7206 0 4052 W0Y6AA OS TO CONUS ITR CONUS AVSCOM 7207 3 4055 W0Y6AA ARADMAC IN MAINT NAVAL AIR STN AVSCOM 7208 0 4055 W1BSAA NAVAL AIR CTR LOAN PATUXENT AVSCOM 7209 0 4055 W1BSAA NAVAL AIR CTR LOAN PATUXENT AVSCOM
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