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Hebbronville, TX
THE CREW WERE ADVISED THAT THE ACFT'S VACUUM PUMP SYSTEM WAS INOPERATIVE DUE TO A SHEARED PUMP DRIVESHAFT. THE COPILOT HAD STATED THAT FSS HAD FORECAST 25,000 FT BROKEN & HE DID NOT FEEL HE WOULD NEED THE PUMP. AT 1735 THE PLT CONTACTED CENTER & REQUESTED RADAR ADVISORIES TO BROWNSVILLE. AT 1812 THE PILOT REQUESTED & WAS GRANTED PERMISSION TO DEVIATE AROUND A CELL. 12 MINUTES LATER THE TARGET DISAPPEARED. WRECKAGE EXAMINATION REVEALED THAT THE TAIL & RIGHT WING HAD SEPARATED IN FLIGHT. THERE WAS A VIP LEVEL 1 ECHO WITHIN 5 MI EAST & A VIP LEVEL 3 ECHO WITHIN 10 MI SE OF THE ACCIDENT SITE. MODERATE TO SEVERE CONVECTIVE TURBULENCE & UP & DOWN DRAFTS WOULD HAVE BEEN PRESENT BELOW 10,000 FT. THE PLT'S LIVER TISSUE PRODUCED 96 MG% ETHYL ALCOHOL & MIXED TISSE FLUID PRODUCED 112 MG%.
THE CREW WERE ADVISED THAT THE ACFT'S VACUUM PUMP SYSTEM WAS INOPERATIVE DUE TO A SHEARED PUMP DRIVESHAFT. THE COPILOT HAD STATED THAT FSS HAD FORECAST 25,000 FT BROKEN & HE DID NOT FEEL HE WOULD NEED THE PUMP. AT 1735 THE PLT CONTACTED CENTER & REQUESTED RADAR ADVISORIES TO BROWNSVILLE. AT 1812 THE PILOT REQUESTED & WAS GRANTED PERMISSION TO DEVIATE AROUND A CELL. 12 MINUTES LATER THE TARGET DISAPPEARED. WRECKAGE EXAMINATION REVEALED THAT THE TAIL & RIGHT WING HAD SEPARATED IN FLIGHT. THERE WAS A VIP LEVEL 1 ECHO WITHIN 5 MI EAST & A VIP LEVEL 3 ECHO WITHIN 10 MI SE OF THE ACCIDENT SITE. MODERATE TO SEVERE CONVECTIVE TURBULENCE & UP & DOWN DRAFTS WOULD HAVE BEEN PRESENT BELOW 10,000 FT. THE PLT'S LIVER TISSUE PRODUCED 96 MG% ETHYL ALCOHOL & MIXED TISSE FLUID PRODUCED 112 MG%.