LOSS OF ALL CAPT AND FO PRIMARY FLT INSTS. UNABLE TO GET THEM BACK IN POOR WX CONDITIONS. DIVERTED TO VFR ARPT WHERE TROUBLESHOOTING FOUND NO MAJOR DISCREPANCY.

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DSNDING FOR APCH AND LNDG AT MCI; WHILE PASSING 7000 FT AND 13 NM W OF MCI; IN IMC CONDITIONS AND MODERATE TURB; EXPERIENCED THE FOLLOWING FAILURES OF NAV AND FLT INSTS: FO LOST ATTITUDE INDICATOR (HSI); WITH SEVERAL FLAGS IN HIS CDI. FO ATTEMPTED TO SWITCH AND BOOTSTRAP TO CAPT'S INSTS (BOTH ON #1 CAPT'S INST TO FO DISPLAY) -- NO IMPROVEMENT. FO STILL WITHOUT HSI OR CDI. NEXT CAPT GOT 'ROLL' INDICATOR ON HIS INST COMPARITOR PANEL FOLLOWED BY INTERMITTENT PITCH INDICATOR; FOLLOWED BY LOSS OF BOTH AUTOPLTS. CAPT NOW FLYING PARTIAL PANEL. NEEDLE; BALL; AIRSPD; WHISKEY COMPASS; STANDBY HORIZON; IMC; MODERATE TURB. WAS ABLE TO MAINTAIN 210 KTS R SIDE UP AND 7000 FT ALT BUT VERY DIFFICULT TO MAINTAIN HDG. REQUESTED RADAR VECTOR AND HDG HELP FROM ATC TO A VFR ARPT FOR LNDG. PROCEEDED TO AND LANDED VFR OMA. ATTEMPTED CHK OF ALL CIRCUIT BREAKERS; FOUND NONE POPPED. WX RPT FOLLOWED FROM MCI OF WX DETERIORATING. TSTM APCHING FIELD AND OVERHEAD. WINDSHEAR ADVISORY OF LOSS OF 20 KTS ON FINAL; WIND GUSTING AND HVY HAIL. ON GND AT OMA DURING WALKAROUND; FOUND 2 STATIC WICKS MISSING ON HORIZ STABILIZER AND 1 STATIC WICK MISSING ON R WING. SUSPECT POSSIBLE LIGHTNING STRIKE -- BUT FELT NONE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR CAPT SAYS THAT IN HIS 30 YRS OF FLYING; HE HAS NEVER EXPERIENCED SUCH A BID SIT. LITERALLY; ALL HE HAD AS FLT INSTS WERE NEEDLE/BALL; WET COMPASS; STANDBY AIRSPD; AND ALTIMETER. ALL OTHER FLT INSTS WERE OF NO USE. AT FIRST; THE FO'S FLT INSTS WENT OUT WITH ALL ASSOCIATED FLAGS. HE TRIED TO SWITCH HIS FLT INSTS TO USE THE CAPT'S; BUT WHEN SWITCHING; THE CAPT LOST ALL HIS SIDE. THEY WERE UNABLE TO GET BACK THEIR INSTS AFTER SOME TROUBLESHOOTING; CIRCUIT BREAKERS CHKED; ETC. BECAUSE THE WX AT MCI WAS POOR; IMC WITH WINDSHEAR ALERTS; ST EMLO'S FIRE HVY ON WINDSHIELD; THEY RECEIVED VECTOR HELP FROM ATC AND DIVERTED TO OMA WHERE THE WX WAS GOOD. ENRTE TO OMA SOME OF THE INSTS STARTED COMING BACK ON THE LINE; BUT SINCE THE CONDITIONS HAD BEEN SO UNUSUAL; THE FLC DIDN'T TRY TO TROUBLESHOOT FURTHER AND JUST KEPT WHAT THEY HAD (WHICH WASN'T MUCH). AFTER LNDG AT OMA THEY DISCOVERED SOME STATIC WICKS MISSING; BUT RPTR CAPT SAID THEY APPEARED TO BE BROKEN OFF AND NOT AS A RESULT OF A LIGHTING STRIKE. IN FACT; NEITHER THE FLC NOR THE FLT ATTENDANTS NOTED ANY EVIDENCE OF A LIGHTNING STRIKE. BESIDES; THE MEL STATES THAT 2 WICKS MAY BE MISSING WHICH; IN THIS CASE; THERE WERE NO MORE THAN 2 ON A SIDE. CONTRACT MAINT AT OMA DID A BYTE CHK AND AS FAR AS RPTR KNOWS; NOTHING WAS FOUND. AFTER THE ACFT WAS REBOOTED EVERYTHING APPEARED NORMAL AND THEY TOOK OFF 4 HRS LATER FOR THEIR ORIGINAL DEST; MCI. LNDG IN MCI THEY EXPERIENCED A SPLIT FLAP; WHICH MAY OR MAY NOT HAVE BEEN RELATED TO THE PREVIOUS LOSS OF FLT INSTS. IN THE FINAL ANALYSIS; THIS OCCURRENCE STILL CANNOT BE EXPLAINED.