LJ45 ON VECTOR FOR APCH TO SCK HAS A FREQ MIX-UP; CALLS TWR; AND FINALLY RETURNED TO APCH CTL FOR A NEW VECTOR.

Narrative

TALKING TO STOCKTON APCH; DSNDED FROM 11000 FT TO 4000 FT AND ASSIGNED A 170 DEG HDG; APPROX 10 MI FROM MODESTO ARPT. GIVEN ANOTHER APCH FREQ OF 120.95. PNF READ BACK 120.45; WHICH WAS NEVER CAUGHT. MADE SEVERAL ATTEMPTS TO CONTACT NEW STOCKTON APCH. TALKED ABOUT GOING BACK TO LAST FREQ; BUT DUE TO CONGESTION OF PREVIOUS FREQ; PROX TO ARPT AND NUMBER OF TARGETS ON TCASII; THOUGHT WE WOULD BE ABLE TO TALK TO A CTLR MORE QUICKLY IF WE CONTACTED MODESTO TWR; WHICH WE DID. TOLD THE TWR WHERE WE WERE AND THAT WE WERE UNABLE TO CONTACT APCH. HE ASKED US IF WE HAD THE FIELD IN SIGHT; WHICH WE DID. HE CLRED US FOR A VISUAL APCH TO RWY 28R AND TOLD US TO CALL A 2 MI R BASE; AND THAT THERE WAS A COMMUTER ON A L BASE FOR THE SAME RWY. AS WE DSNDED INTO A R BASE; WE ASKED FOR THE COMMUTER'S LOCATION. THE TWR CTLR TOLD US TO CANCEL THE APCH CLRNC; CLB TO 3000 FT ON A 140 DEG HDG AND CONTACT APCH. APCH TOLD US OUR LAST ASSIGNED CLRNC WAS TO MAINTAIN 4000 FT ON A 170 DEG HDG AND THAT THERE WAS COMMUTER TFC FOR THE ARPT. AT NO TIME WERE WE EVER TOLD THAT THERE WAS A CONFLICT; NOR DID WE RECEIVE ANY TA OR RA ON THE TCASII. APCH GAVE US A COUPLE MORE VECTORS; ASKED IF WE HAD THE ARPT IN SIGHT (WHICH WE DID) AND CLRED US FOR A VISUAL TO RWY 28R. WHEN HE SWITCHED US TO MOD TWR; HE GAVE US A NUMBER TO CALL. SPOKE TO THE SUPVR WHO WAS VERY HELPFUL. HE LISTENED TO THE TAPES; ASKED WHY WE DID WHAT WE DID. SAID THAT HIS CTLR WAS IN ERROR FOR NOT CATCHING OUR INCORRECT FREQ READBACK; AND THAT THE TWR CTLR SHOULD NOT HAVE ACCEPTED US BUT SHOULD HAVE SENT US TO THE CORRECT FREQ. ALSO; WE SHOULD HAVE GONE BACK TO THE LAST GOOD FREQ. HE ALSO MADE NO MENTION OF ANY TFC CONFLICT AND DID SAY THAT THERE WAS NO PROB.