C310 PLT HAS DIFFICULTY MAINTAINING STRAIGHT PATH ON TKOF AND ABORTS. ON THIRD TRY; AFTER TROUBLESHOOTING THE ACFT DEPARTS WITH NO PROB. ON RETURN HE ATTEMPTS TO TAXI SINGLE ENG AS HE HAS SEEN COMMUTER ACFT DO. A PERSON REPRESENTING HIMSELF AS AN AVIATION SAFETY COUNSELOR ENTERS HIS HANGAR LOOKING AT THE ACFT AND REFUSES TO LEAVE WHEN REQUESTED. HE INDICATES RPTR WAS HAVING ENG PROBS AND IS TOLD THAT IS NOT SO.

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IN SUM: RPT REGARDING INCIDENT WHICH OCCURRED IN JULY OF 1996. RPTR HAD SOME PROBS MAINTAINING DIRECTIONAL CTL AND ABORTED TKOF TWICE. HE BELIEVED IT MIGHT HAVE SOMETHING TO DO WITH A BRAKE PROB WHICH HAD OCCURRED PREVIOUSLY. ON THE THIRD TKOF ATTEMPT ALL WENT WELL. HE FLEW TO ACK TO PICK UP FRIENDS AND DROP THEM OFF AT PLYMOUTH ARPT. AGAIN NO PROBS WITH TKOF OR INSTRUMENTATION; NORMAL FLT. ON RETURN TO HOME ARPT RPTR DECIDED TO ATTEMPT A SINGLE ENG TAXI. HIS FORMER FLT INSTRUCTOR HAD RESPONDED TO HIS QUESTION ABOUT WHY THE COMMUTERS TAXI ON 1 ENG WITH THE ADVICE THAT IT SAVED MONEY. HE SAW NO PROB WITH TRYING TO DO THIS AS THE FIELD WAS VERY QUIET. WITH 1 ENG SHUT DOWN HE HEARD ON UNICOM A PLANE WAS LNDG; SO IN AN ATTEMPT TO MOVE OFF THE TXWY HE RESTARTED THE R ENG. FEELING HE REALLY WANTED TO GET THE ROUTINE OF SINGLE ENG TAXI HE SHUT DOWN THE R ENG AGAIN. HAVING DIFFICULTY MOVING STRAIGHT AHEAD HE AGAIN STARTED THE ENG. AFTER TAXI TO HANGAR A MAN CAME LOOKING AROUND THE ACFT AND WHEN ASKED IDENTED HIMSELF AS AN AVIATION SAFETY COUNSELOR. HE WOULD NOT LEAVE THE HANGAR WHEN ASKED TO DO SO. HE QUERIED RPTR ABOUT TROUBLE WITH HIS R ENG. RPTR INDICATED HE HAD NO TROUBLE. THE MAN FINALLY LEFT THE HANGAR. THERE HAD BEEN BAD FEELINGS BTWN THE ARPT MGR AND MAINT PERSONNEL AT THE ARPT AND SOMEHOW THIS INCIDENT WAS USED TO FILE CHARGES AGAINST THE ARPT MGR. RPTR HAS SINCE RECEIVED THREATS. THIS IS THE REASON HIS ATTORNEY SUGGESTED HE FILE A RPT WITH ASRS.