PROX OF CLOUDS IN VFR DEP FROM NON TWR ARPT WITHOUT ACTIVATING IFR CLRNC BEFORE TKOF. IMC IN VFR FLT.

Narrative

I WAS ON AN IFR FLT PLAN FROM 2M8 TO LOZ WHERE I PLANNED TO REFUEL; THEN CONTINUE ON MY SECOND IFR FLT PLAN TO CXY. I RECEIVED VECTORS TO THE VOR RWY 5 APCH; AND THE WX FOR LOZ (WHICH I DO NOT HAVE A COPY OF). I BROKE OUT FROM CLOUDS ABOVE PATTERN ALT WITH THE RWY IN SIGHT. I CALLED ZID AND INFORMED THEM AND REQUESTED CANCELLATION OF MY IFR FLT PLAN FOR A VISUAL LNDG. THE CTLR CANCELLED MY PLAN AND ADVISED 'FREQ CHANGE APPROVED.' I THEN SWITCHED TO 123.6; THE FREQ FOR LONDON RADIO (CTAF) AS SHOWN ON THE APCH PLATE AND ANNOUNCED MY ARR ON THE VOR RWY 5 APCH. I LANDED AND REFUELED AND THEN TAXIED ALONG THE PARALLEL TXWY. I ANNOUNCED ON 123.6 THAT I WAS ABOUT TO 'BACK- TAXI' FOR RWY 5; AND FINALLY; WHEN ABOUT TO DEPART; I ANNOUNCED 'DEPARTING RWY 5.' ON DEP; I CONTACTED ZID ON MY LAST ASSIGNED FREQ 121.325; WHICH IS ALSO THE FREQ SHOWN ON THE APCH PLATE AND REQUESTED MY CLRNC. THE CTLR INFORMED ME THAT I HAD VIOLATED FARS BY DEPARTING VFR IN IFR CONDITIONS. AT THAT POINT; I WAS STILL IN VMC AND ESTIMATED THE CEILING TO BE 1500 FT AGL OR MORE AND VISIBILITY TO BE AT LEAST 3 NM. I ACKNOWLEDGED HIS COM AND WAS GIVEN CLRNC. HE SUBSEQUENTLY TOLD ME TO CALL INDIANAPOLIS QUALITY ASSURANCE. I DID THIS THE NEXT DAY; BUT THE OFFICE WAS APPARENTLY CLOSED OVER THE WKEND AND I DID NOT SPEAK WITH ANYONE UNTIL MAR/MON/93. I WAS SUBSEQUENTLY CONTACTED BY MR X FROM LOUISVILLE; KY. HE TOOK INFO FOR AN INVESTIGATION AND TOLD ME INSPECTOR Y WOULD BE HANDLING THE INVESTIGATION.