DURING NORMAL ILS APCH; NO DIFFERENT THAN THOUSANDS OF PREVIOUS ILS APCHS IN SPACING AND SEPARATION; THE RPTR ENCOUNTERS SURPRISING WAKE TURB.

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REGARDING REQUEST FOR WAKE TURB ENCOUNTER RPTS. ON CIVET PROFILE DSCNT TO LAX; 8 NM IN TRAIL OF B727; AT OR JUST ABOVE 25L GS; WITH AUTOPLT ON; OUR MD80 ROLLED 15 DEGS R IN 5 SECONDS; THEN ROLLED L; PAST VERT; TO ABOUT 15 DEGS L; WITHIN 5-6 SECONDS; AT WHICH POINT THE AUTOPLT DISENGAGED. NO FURTHER DISTURBANCE; REST OF APCH AND LNDG WAS NORMAL. NO OBSERVED TFC EXCEPT FOR ACFT AHEAD; WHICH WAS NOT IN SIGHT DUE TO CITY LIGHTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS PROMPTED TO SUBMIT THIS RPT PARTLY BECAUSE THE BENIGN ROUTINE APCH ENCOUNTERED THE UNUSUAL WAKE. THE WAKE ENCOUNTER WAS SO UNEXPECTED. THE MD82 AUTOPLT SELF DISCONNECT ALMOST NEVER HAPPENS. THE B727 WAS 8 MI AHEAD AND APPEARED TO BE BELOW EVEN THOUGH IT PROBABLY WAS FOLLOWING THE GS AND WAS AT THE SAME ALT AT THE SAME POINTS ALONG THE ILS. THIS WAS A NORMAL ROUTINE APCH. ALL OF A SUDDEN THE AIRPLANE ROLLED ABRUPTLY 15 DEGS 1 WAY FOLLOWED BY A RAPID ROLL IN THE OTHER DIRECTION; BANKED TO 15 DEGS THE OTHER DIRECTION. THE AUTOPLT DISCONNECTED ITSELF ON THIS SECOND ROLL.