2 SMAS HAD AN NMAC IN THE TFC PATTERN AT LGB.

Narrative

LONG BEACH TWR CLRED ME TO LAND ON RWY 25L. AT ABOUT 1 MI OUT ON FINAL; I OBSERVED A HVY INBOUND TO RWY 30. I ANTICIPATED A GAR SINCE WE WERE GOING TO APCH THE FIELD AT ABOUT THE SAME TIME. THE TWR TOLD ME TO MAKE A R TURN AND REENTER DOWNWIND. I HAD INITIALLY APCHED THE ARPT USING THE STANDARD L PATTERN WHICH IS S OF RWY 25L. RWY 25R IS CURRENTLY CLOSED FOR REPAIRS. I COMMENCED A CLBING R TURN (ABOUT 200 DEG R TURN TO REENTER RWY 25L PATTERN). AS I WAS CLBING BACK TO PATTERN ALT (1000 FT) AND BEGINNING TO INTERCEPT AN EXTENDED DOWNWIND FOR L TFC RWY 25L; I OBSERVED A LOW WING SMA CROSS BELOW ME AND EXIT TO MY R; LNDG ON RWY 25L. THE ACFT PASSED DIRECTLY BELOW ME FROM L TO R; AND ABOUT 300 FT BELOW. I ACCELERATED MY CLB FROM 900 FT TO THE 1000 FT PATTERN ALT. I CALLED THE TWR AND RPTED THE NEAR MISS AND ASKED WHY THIS TFC WASN'T CALLED OUT. THERE WAS A PAUSE; FOLLOWED BY THE EXPLANATION THAT THE TWR MEANT THAT I SHOULD HAVE ENTERED R TFC FOR RWY 25L (MID ARPT). SINCE RWY 25R IS CLOSED; THERE MAY BE TEMPORARY USE OF A R HAND PATTERN FOR RWY 25L; HOWEVER; THIS CAN CONFLICT WITH HELI TFC. THE TWR DID NOT SPECIFY THAT 'DOWNWIND' WAS DIFFERENT FROM THE 'L TFC DOWNWIND' I JUST LEFT. THE TWR OBVIOUSLY WAS NOT OBSERVING THE RESULTS OF THE DIRECTIVE TO TURN R AND REENTER DOWNWIND; SINCE NO CONFLICT ALERT WAS ISSUED.