RPTED LTSS WHEN A B747 CLBED THROUGH THE ALT OF A COMMUTER BE02 WHICH HAD STOPPED ITS CLB AT 14200 FT. THE BE02 RECEIVED A TCASII ALERT ON THE B747 AND TURNED TO PARALLEL ITS COURSE.

Narrative

THE SIT STARTED WHEN I TURNED A B747 ON COURSE ANTICIPATING THAT IT WOULD TOP ALL THE OTHER TURBOPROP ACFT IN THE AIRSPACE. I WAS DISTR PUTTING ALL THE COMMUTERS ON MY FREQ IN TRAIL USING ALT AND MILEAGE AND DIDN'T REALIZE HOW SLOWLY THE B747 WAS CLBING. THE CONFLICT ALERT WENT OFF. I TURNED AND EXPEDITED THE B747 AND DSNDED THE BE02. SUPPLEMENTAL INFO FROM ACN 371379: AS WE WERE CLBING THROUGH 14000 FT WE HAD A TCASII ALERT AT OUR 5 O'CLOCK POS. I LOOKED FOR A VISUAL ON THE TFC. THERE WAS A B747 BELOW US ABOUT 3-5 MI AND CLBING. AT THAT POINT; ATC CALLED AND SAID TO DSND TO 11000 FT. AFTER CAREFUL EVALUATION OF THE SIT; I DECIDED NOT TO DO WHAT I WAS INSTRUCTED BY ATC. I FELT THAT IF WE STARTED TO DSND THAT WE WOULD HAVE CLIPPED THE B747 OR WE WOULD HAVE HIT ITS WAKE TURB. I ELECTED TO MAKE A TURN TO THE L TO PARALLEL THE FLT PATH OF THE B747. ALL OF THIS HAPPENED WITHIN A FEW SECONDS. AS I STARTED THE EVASIVE ACTION; THE B747 CAME INTO VIEW AT OUR 12 O'CLOCK POS. WE WERE VERY CLOSE AND THE FLC STATED THAT WE WERE 400 METERS AWAY. THE ENTIRE TIME; ATC NEVER STATED A TFC ALERT. THE ATC OPERATOR HAD NO URGENCY OF THE SIT IN HER VOICE. CALLBACK CONVERSATION WITH RPTR ACN #371392 REVEALED THE FOLLOWING INFO: THEY OPERATED WITH A TCASII. THE CAPT CALLED THE FACILITY REGARDING THE NEAR MISS AND WAS TOLD THEY WERE INVESTIGATING THE INCIDENT. THEY HAD JUST COME OUT OF THE CLOUDS WHEN THEY SAW THE B747 AND THAT IT MOVED A LITTLE BUT DID NOT TAKE EVASIVE ACTION. A PAX ON THE RPTR'S ACFT COMMENTED TO THE CLOSENESS OF THE B747 TO THEIR ACFT.