MD88 CREW HAS GENERATOR FAILURE AT START OF DESCENT; WHICH CAUSED A CROSSTIE LOCKOUT WITH ASSOCIATED INSTRUMENT AND SYSTEM FAILURES.

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AT CRUISE WITH AUTOPLT ENGAGED; ACFT LOST ENTIRE R ELECTRICAL SYS DUE TO A FAULT ON GENERATOR AND CORRESPONDING BUS. LOST ALL FO INSTS; AUTOFLT; AUTOTHROTTLES AND ALL FMS INFO. I MAINTAINED ACFT CTL BY FLYING ACROSS COCKPIT USING RAW DATA FROM CAPT'S PRIMARY FLT INSTS. MINOR DEVS FROM COURSE AND ALT MAY HAVE OCCURRED. CHKLIST PROCS DID NOT RESTORE LOST SYS AND AN EMER WAS DECLARED. CTR VECTORED US TO AN UNEVENTFUL LNDG AT OUR PLANNED DEST OF ZZZ. NO LOSS OF SEPARATION OCCURRED THAT WE WERE AWARE OF. SUPPLEMENTAL INFO FROM ACN 724139: WE WERE AT FL330; HAD JUST BEGUN DSCNT APPROX 100 MI FROM ZZZ; WHEN AUTOPLT KICKED OFF WITH A R GENERATOR FAILURE AND XTIE LOCKOUT. WE WERE OVER ZZZ1. WX AROUND ZZZ1 WAS IFR. WX AT ZZZ WAS 1800 FT; 10 MI. DECLARED EMER AND PROCEEDED TO ZZZ. COPLT COMPLETED ALL EMER CHKLISTS AND NORMAL CHKLISTS. CAPT FLEW A RAW DATA HAND FLOWN ILS APCH IN TO ZZZ. LNDG WAS NORMAL. TERMINATED EMER; PROCEEDED TO GATE AND OFFLOADED PAX. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER STATED THAT MAINTENANCE REPLACED THE GENERATOR CONTROL PANEL AND RESET THE CROSSTIE TO CORRECT ALL THE ELECTRICAL PROBLEMS REPORTED.