A CESSNA 182RG OPERATOR WITH ENG 5 HRS IN EXCESS OF OVERHAUL TIME.

Narrative

RPT CONCERNING INADVERTENT OP OF ACFT; A CESSNA 182RG; 5.3 HRS BEYOND RECOMMEND TIME BETWEEN OVERHAULS (TBO). ON AUG/XX/96; ABCD OF YYY AVIATION; NOTIFIED ZZZ AVIATION THAT AN AIR TAXI ACFT; 000; A CESSNA 182RG; HAD INADVERTENTLY BEEN OPERATED BEYOND RECOMMENDED TBO; AN ITEM SPECIFIED IN OUR COMPANY OPS MANUAL. IT SEEMS THAT ENOUGH MATHEMATICAL ERROR IN PREVIOUS LOGBOOK ENTRIES; AND THROUGH POSSIBLE PROCEDURAL GAPS; THAT OUR COMPANY; ZZZ AVIATION OPERATED ACFT 5.3 HRS BEYOND RECOMMENDED TBO. ABCD IS OUR DIRECTOR OF MAINT; OWNER OF YYY AVIATION; AND THE OWNER OF ACFT. ALL OF OUR MAINT IS THROUGH CONTRACT WITH YYY AVIATION. ACFT IS ON LEASE TO ZZZ AVIATION; AND TO THIS POINT HAS BEEN OPERATED BOTH AS A RENTAL ACFT AND AS A PART 135 ACFT. THERE WERE 5 LEGS FLOWN INVOLVING 2 PLTS; DDD; 2.7 HRS; AND WWW; 2.6 HRS. THE ENG; A LYCOMING 0-540 HAS A RECOMMENDED TBO OF 2000 HRS. ACTUAL OVERHAUL WAS BEGUN AT 2005.3 HRS. POSSIBLE CAUSES AND SOLUTIONS: 1) ACFT LOGBOOKS WERE BEING KEPT IN THE CONTRACT MAINT OFFICE. SINCE THIS OCCURRENCE; WE HAVE MOVED ALL LOGBOOKS INTO THE ZZZ AVIATION OFFICE. 2) MATHEMATICAL ERRORS OR OVERSIGHTS: WE HAVE HIRED FULL TIME; AN IA TO REVIEW AND OVERSEE ALL PART 135 LOGBOOKS; MAINT COMPLIANCE ISSUES; AND PROCS. 3) PREVIOUS ACFT FLT/MAINT DISCREPANCIES LOG REQUIRED SOME INTERP TO DETERMINE ENG OVERHAUL TIMES. A CHANGE HAS BEEN IMPLEMENTED ON THE FLT/MAINT DISCREPANCIES FORM TO INCLUDE ENG OVERHAUL DUE TIME WHICH REFLECTS THE ACTUAL HRS REMAINING ON A DAILY BASIS. 4) ENG OVERHAUL DUE TIMES WERE PREVIOUSLY NOT INCLUDED ON THE ACFT STATUS BOARD. A CHANGE HAS BEEN MADE TO INCLUDE ENG OVERHAUL DUE ON EACH PART 135 ACFT ON THE STATUS BOARD. 5) PART 135 ACFT HAVE BEEN UTILIZED FOR RENTAL ACTIVITY. A CHANGE HAS BEEN MADE TO SEGREGATE AIR TAXI ACFT FROM RENTAL ACFT. IN ADDITION TO THE ABOVE POLICY AND PROCEDURAL CHANGES; WE WILL BE MONITORING ALL ACFT LOGBOOKS AND ANALYZING ENTRIES MORE CAREFULLY.