ROUGH RUNNING ENGINE ON BE36 RESULTS IN PRECAUTIONARY LANDING AND DISCOVERY OF AN UNATTACHED TURBO PRESSURE REGULATOR HOSE. ON SITE REPAIR ACCOMPLISHED.

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ON A FLT THE PLT HAD REQUESTED AND RECEIVED FLT FOLLOWING. WHILE FLYING AT 5500 FT; APPROX 30 MINS INTO THE FLT THE ACFT ENG SUDDENLY STARTED TO SURGE VIOLENTLY. THE PLT IMMEDIATELY SWITCHED FUEL TANKS; WENT TO FULL RICH ON THE MIXTURE; THROTTLING BACK; LOWERED THE RPM; AND TURNED THE ELECTRICAL FUEL PUMP ON AND OFF; ALL OF WHICH DIDN'T STOP THE SURGING. THE PLT CALLED TRACON AND DECLARED AN EMER. TRACON TOLD HIM THAT THE ZZZ ARPT WAS 7 MI AND 11 O'CLOCK POS. THE PLT OBTAINED VISUAL CONTACT WITH THE ARPT AND TURNED AND HEADED THAT DIRECTION. TRACON SAID THE WIND WAS CALM AND THEY WERE USING RWY XX. BY THIS TIME THE ACFT WAS DOWN TO 3500 FT AND THE SURGE HAD STOPPED. THE PLT TOLD TRACON WHAT WAS GOING ON TO ZZZ; AS THERE IS NO SVC AT ZZZ. HOWEVER; THE SURGE RETURNED AND THE PLT TOLD TRACON THAT HE WAS GOING TO LAND ON RWY XY AS THERE WASN'T ANY WIND OR TFC. THE LNDG WAS NORMAL AND AS TRACON COULDN'T HEAR THE PLT ON THE GND ANOTHER AIRBORNE PLT RELAYED THE MESSAGE THAT THE ACFT WAS DOWN SAFELY. THE PLT TAXIED TO THE RAMP AND SHUT DOWN THE ENG; GOT OUT AND INSPECTED THE ACFT AND FOUND NO LEAKS OR DAMAGE. LIFTING THE L COWL THE PLT FOUND A BROWN HOSE COMPLETELY DISCONNECTED. THE PLT CALLED HIS ACFT MECH BY CELL PHONE AND FROM THE DESCRIPTION OF THE HOSE AND THE LOCATION OF THE CONNECTING FITTING THE ACFT MECH CONCLUDED THAT THIS WAS THE UPPER DECK HOSE FOR THE TURBO PRESSURE REGULATOR. USING A PAIR OF CHANNEL LOCKS THAT WERE IN THE ACFT THE PLT WAS ABLE TO REATTACH AND TIGHTEN THE HOSE ON THE FITTING WHICH IS DOWN STREAM OF THE TURBO. AFTER STARTING THE ENG AND PER THE PLT'S ACFT MECH INSTRUCTIONS HE RAN THE ENG TO FULL PWR FOR ABOUT 10 SECONDS; TO VERIFY THAT EVERYTHING APPEARED NORMAL. AFTER TAKING OFF THE PLT AGAIN CONTACTED TRACON FOR FLT FOLLOWING. TRACON ASKED WHAT HAD CAUSED THE SURGE PROB AND THE PLT TOLD THEM ABOUT THE DISCONNECTED HOSE AND STATED THAT EVERYTHING WAS OPERATING NORMALLY. APPROX 25 MINS LATER THE ACFT MADE A NORMAL LNDG AT ZZZ2.