MOONEY M20F HAS NMAC IN TFC PATTERN AT BVI.

Narrative

AFTER CONTACTING PIT APCH; I ESTABLISHED VISUAL CONTACT WITH THE RWY AT BVI AT APPROX 8 NM FROM THE FIELD. I WAS THEN HANDED OFF TO BVI TWR AT WHICH TIME I EXECUTED A DSCNT TO 2300 FT MSL AND TURNED ON MY LNDG LIGHT TO MAKE MYSELF VISIBLE TO THE TWR. I WAS CLRED BY THE TWR TO ENTER A L DOWNWIND FOR RWY 28 AND TO RPT MIDFIELD. SHORTLY THEREAFTER; A C172 WAS CLRED FOR TKOF AND INSTRUCTED TO MAKE L CLOSE TFC FOR RWY 28. I WAS TOLD BY THE TWR TO EXPECT TO BE #2 FOR THE ARPT BEHIND THE CESSNA. I LOOKED BUT DID NOT SEE THE CESSNA TAKE OFF. WHEN I WAS APPROX 2 NM WSW OF THE UPWIND NUMBERS FOR RWY 28 AT 2400 FT MSL STILL DSNDING TO 2300 FT MSL; JUST PRIOR TO ENTERING THE DOWNWIND FOR RWY 28; TWR CALLED THE CESSNA AT XWIND FOR RWY 28. THE CESSNA NEVER CALLED ITS POS IN THE PATTERN. I LOOKED TO THE 10-11 O'CLOCK POS; AND NOTED THE CESSNA AT MY ALT RAPIDLY CONVERGING WITH MY ACFT IN A QUARTERING TO PERPENDICULAR MANNER. THE CESSNA DID NOT HAVE ITS LNDG LIGHTS ON. I IMMEDIATELY EXECUTED A 60-70 DEG ANGLE-OF-BANK TURN TO THE R APPLYING FULL R RUDDER TO AVOID A MIDAIR COLLISION. I PASSED UNDER THE CESSNA. I THEN ENTERED THE DOWNWIND FOR RWY 28 AND LANDED. WHILE TAXIING I REQUESTED TO MEET WITH TWR PERSONNEL.