THE RPTR EXPERIENCED A NMAC WITH AN F86 FIGHTER. THE F86 WAS NOT SQUAWKING ALT; HE WAS IN THE CLASS B AIRSPACE WITHOUT A CLRNC; HE WAS DOING AEROBATICS; HE WAS EXCEEDING 250 KTS BELOW 10000 FT AND HE NEVER SAW THE ACFT HE CAME WITHIN 50-100 FT OF.

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CESSNA T210 SEBOUND AT 11500 FT FROM SACRAMENTO TO MYF ON FLT FOLLOWING (RADAR ADVISORIES) ENTIRE 405 NM FLT. HANDED OFF FROM ONTARIO APCH TO SOCAL APCH AND CLRED INTO CLASS B AIRSPACE; PRESENT POS DIRECT MYF IN VFR CONDITIONS TO 3500 FT. APPROX 4 MI W OF L39 APCH CALLS TFC AT MY 9 O'CLOCK 1 1/2 MI AND NO MODE C RPTING. I AM IN A 500 FT DSCNT IN LIGHT HAZE (VISIBILITY 10+ MI). SAW NO TFC UNTIL A FLASH IN L CORNER OF MY EYE (9 O'CLOCK) WENT RIGHT UNDER OUR PLANE AND CAME OUT 3 O'CLOCK HEADING W; WITHIN 50-100 FT BELOW US. LOOKED LIKE F86 OR M16 (KOREAN VINTAGE). IT PULLED UP IN STEEP CLB INTO A 360 DEG ROLL AND PUSHED OVER INTO STEEP DSCNT. I ADVISED APCH OF THE NEAR MISS AND CTLR SAID THE ACFT WAS INDICATING 250 KTS PLUS. MY GUESS WAS THAT THE PLT EITHER TOOK OFF OUT OF L39 OR WAS DOING A HIGH SPD LOW PASS ALONG RWY 27 AT L39 (WAR BIRDS ARE KNOWN TO DO THIS AT RAMONA). THE NEAR MISS WAS IN AN APPROX LINE WITH THE RWY 27. I WAS NOT SURE IF THE F86 PLT WAS JUST HAVING SPORT WITH US OR AVOIDING ALMOST RUNNING US OVER. THE AEROBATIC ROLL WAS NOT NECESSARY IN OR JUST UNDER CLASS B AIRSPACE; ESPECIALLY WHEN NOT RPTING MODE C NOR TALKING TO SOCAL APCH. I LATER (3 DAYS) SPOKE TO THE TRACON FLOOR SUPVR OF THE INCIDENT AND FILED A NEAR MIDAIR COLLISION RPT. HE SPOKE TO THE OTHER PLT WHO CALLED THEM TO INQUIRE IF HE ACCIDENTLY ENTERED CLASS 'B' AIRSPACE. THE F86 PLT SAID NOTHING OF THE NEAR MISS. EITHER HE NEVER SAW ME OR HE CALLED TO SEE IF I RPTED THE NEAR MISS. HE LANDED LOCALLY AT PALOMAR ARPT (CRQ). WHAT WOULD I DO DIFFERENTLY NEXT TIME? BE MORE AGGRESSIVE TO SPOT MY TFC (ESPECIALLY IF NO ALT) AND ASK APCH FOR MORE POS RPTS ON THE NEGATIVE CONTACT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT SINCE HE SENT IN THE RPT HE LEARNED THAT THE ACFT WAS AN F86. HE SAID THE LCL FSDO HAD A TALK WITH THE PLT. THE PLT WAS VERY APOLOGETIC AND SAID HE WAS DISORIENTED MOMENTARILY AND CONCERNED HE HAD ENTERED THE CLASS B AIRSPACE. NO EXPLANATION AS TO WHY THE VICTORY ROLL OR HIS ALT ENCODER WAS OFF (HE WAS WITHIN 30 MI OF SAN AND LESS THAN 10000 FT). THE RPTR SAID HE; HIS WIFE; CHILDREN AND DOG CAME VERY CLOSE TO GETTING KILLED THAT DAY.