A CPR PLT RPTS OPERATING A PA31P IN NON COMPLIANCE WITH SEVERAL AIRWORTHINESS DIRECTIVES NOT ACCOMPLISHED.

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I WORK FOR A PVT FIRM AS ONE OF THEIR PLTS. I AM CHKED OUT IN BOTH THE PA31P AND B55. I FLY THESE ACFT UNDER FAR PART 91 GUIDELINES. THE PA31 RECENTLY WENT INTO ITS ANNUAL WITH MANY WRITE-UPS. ON SEP/WED/04; I WAS NOTIFIED OF WHAT MAINT ACCOMPLISHED ON THE PLANE AS WELL AS WHAT OTHER WORK WAS STILL REQUIRED. AT THIS POINT; I DISCOVERED THAT SEVERAL AIRWORTHINESS DIRECTIVES WERE OVERDUE; AND THAT THE ACFT HAD BEEN FLOWN (BY MYSELF AND OTHERS) 'ILLEGALLY' DURING THE TIME THAT THESE AIRWORTHINESS DIRECTIVES WERE OVERDUE. NORMALLY; PLTS WOULD HAVE ACCESS TO ACFT RECORDS. HOWEVER IN MY CASE; MY BOSS IS VERY PROTECTIVE OF ANYTHING DEALING WITH HIS BUSINESS; TO INCLUDE INFO ON HIS AIRPLANES. THEREFORE I HAVE HAD TO RELY ON THE INFO HE PROVIDED TO DETERMINE THE AIRWORTHINESS OF THE PLANES. I SHOULD TELL YOU THAT HE IS ALSO A PLT WHO PERIODICALLY FLIES THESE ACFT AS WELL. SO IT IS FEASIBLE THAT I WOULD TRUST WHAT HE HAS TOLD ME. AFTER DISCOVERING PROBS WITH THE PA31P; WE INSISTED THAT WE GET TO LOOK AT THE LOGBOOKS FOR THE B55 ON SEP/FRI/04. DURING OUR REVIEW; I DISCOVERED THAT IT WAS ALSO OVERDUE ON AT LEAST 1 AIRWORTHINESS DIRECTIVE AND THAT I HAD FLOWN IT DURING THIS DELINQUENT TIME. NOW THAT BOTH ACFT ARE IN MAINT; I HAVE AN OPPORTUNITY TO GET A GOOD BASELINE ESTABLISHED ON ALL APPLICABLE AIRWORTHINESS DIRECTIVES AND PERIODIC INSPECTIONS. I WILL TAKE THIS INFO AND BUILD A COMPLETE 'GO-NO GO' CHKLIST FOR EACH PLT TO REVIEW PRIOR TO FLT. I HAVE ALSO LEARNED TO TRUST NO ONE WHEN IT COMES TO THE CONDITION OF AN ACFT WHICH I WILL FLY.