EA50 PLT HAS ALT DEV CAUSED BY AUTOPLT MALFUNCTION THEN EXPERIENCES LNDG WITH LOCKED BRAKES. OTHER AUTOMATION ISSUES ARE REFERENCED.

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DURING CLB AUTOPLT FAILED; CLBED THROUGH ALTITUDE BY 280 FT TO APPROX ALT OF 22280 FT. WE CAUGHT PROBLEM AND WERE CORRECTING WHEN ATC ASKED OUR ALT WHICH WAS RPTED AT 22200 FT AT THAT POINT IN TIME. EA500 ECLIPSE JET HAS HAD NUMEROUS ISSUES WITH THIS AND OTHER AUTOMATED SYSTEMS FAILURES ON THE OLD AVIO SYSTEM AND SAYS AVIO NG WILL FIX ISSUES. ON A PRIOR FLT WE EXPERIENCED 6 WARNING MSGS AT ONCE; THEY WERE: 1. RIGHT ENGINE OIL TEMP OVERHEAT 2. STICK PUSHER FAILURE 3. AIRSPEED DISAGREEMENT 4. TRIM FAILURE 5. AUTOPILOT YAW DAMPER FAILURE 6. HEADING DISAGREEMENT. OUR INITIAL CONCERN AT THE TIME WAS THE OIL TEMP OVERHEAT WHICH WE WERE ATTENDING TO WHEN WITHIN SECONDS ALL THE OTHER WARNING WENT OFF AS WE WERE DSNDING OUT OF FL230 TO 15000 FT. SINCE OUR ATTENTION WAS ON THE OIL TEMP WE DID NOT NOTICE THAT THE AUTOPLT HAD DISENGAGED AS WELL AND BLEW THROUGH OUR ALTITUDE OF 15000 FT TO APPROX 13800 FT. DURING EARLIER FLT BRAKE SYSTEM WAS MUSHY UPON EXTENDING GEAR. PUMPED BRAKES THREE TIMES TO STIFFEN BRAKES WHICH IS A NORMAL ROUTINE PROC BEFORE LNDG. BRAKES DID NOT STIFFEN AND REMAINED MUSHY. PIC ADVISED SIC AS PART OF PRE-LNDG BRIEFING TO KEEP FEET OFF THE BRAKES DUE TO PAST PROBLEMS INVOLVING THIS AND OTHER EA50 ACFT. UPON LNDG R MAIN LOCKED UP ON TOUCHDOWN BLOWING TIRE. WE WERE ABLE TO STEER THE ACFT CLEAR OF THE RWY. ARPT OPS RPTED SKID MARKS AT THE BEGINNING OF TOUCHDOWN TO THE TXWY WE TURNED OFF AT; THAT WERE NOT THERE DURING EARLIER RWY INSPECTIONS THAT DAY. BRAKES AND TIRES HAVE BEEN A MAJOR ISSUE WITH THE EA50; ALONG WITH OTHER NUMEROUS AUTOMATION AND FALSE/REAL WARNING FAILURES. THE EA50 HAS A LOT OF GREMLINS AND CAN BE SOMEWHAT DISCOMFORTING TO FLY. ECLIPSE KEEPS SAYING THAT ALL THE ISSUES WILL BE FIXED WITH THE NEW AVIO NG. IN THE MEAN TIME IT SEEMS WE ARE TEST PLTS FOR THIS ACFT AND HAVE TO STRUGGLE NOT TO FILE A NASA RPT EVERY TIME WE FLY THE ACFT.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: IN ADDITION TO THE PROBLEMS REFERENCED IN HIS RPT; THERE HAVE ALSO BEEN PROBLEMS WITH BLEED AIR OVER TEMPS; FLAP MALFUNCTIONS; AND CRACKED WINDSHIELDS. ALL THIS IN 100 HOURS OF FLYING. THE MANUFACTURER CLAIMS THAT THE UPDATED AVIONICS SYSTEM WILL SOLVE MANY OF THE PROBLEMS. THIS SYSTEM IS NOT AVAILABLE FOR RETROFIT AT THIS WRITING AND WILL NOT CORRECT THE WINDOW; BRAKE; AND FLAP PROBLEMS.