B757 WAS CLRED 4000 FT BELOW THE MINIMUM ENRTE ALT BY THE ZLA RADAR CTLR.

Narrative

ACR X FLT AB CMH-LAS. WHILE ENRTE TO LAS AND PREVIOUSLY CLRED DIRECT TO NOOTN INTXN; THE FOLLOWING CLRNC WAS ISSUED BY ZLA (FREQ 124.2) CTLR: 'ACR X; CROSS NOOTN INTXN AT 11000 FT AND 250 KTS.' THE FO WAS OFF THE FREQ OBTAINING ARR ATIS. I QUESTIONED THE CTLR TO VERIFY HE WANTED NOOTN INTXN AT 11000 FT 250 KTS; AND HE REPEATED; 'CROSS NOOTN INTXN AT 11000 FT 250 KTS.' (PHIGG INTXN IS A PUBLISHED XING RESTR OF 11000 FT 250 KTS ON THE NOOTN 2 ARR.) DURING DSCNT THROUGH APPROX 15000 FT I HEARD ZLA ISSUE AN ACR Y FLT THE SAME CLRNC AND THE ACR Y CREW QUESTIONED THE CTLR AND MENTIONED THAT THAT ALT WAS 4000 FT BELOW THE MINIMUM ENRTE ALT AS DEPICTED ON THE NOOTN 2 STAR ARR. I THEN LOOKED CLOSER AT THE STAR AND SAW THE SEGMENT MINIMUM ENRTE ALT AT NOOTN INTXN OF 15000 FT. I IMMEDIATELY ARRESTED MY DSCNT AND TOLD THE CTLR WHAT ACR Y SAID AND ASKED FOR AND RECEIVED A CLRNC TO CLB BACK TO 15000 FT AT NOOTN INTXN. I WAS LATER GIVEN A CLRNC TO CROSS PHIGG INTXN AT 11000 FT 250 KTS. THIS SAME CLRNC TO CROSS NOOTN INTXN AT 11000 FT 250 KTS WAS ISSUED TO AT LEAST 2 OR 3 OTHER ACFT BY ZLA. HOWEVER; ACR Y WAS THE ONLY ONE TO NOTICE AND REMIND THE CTLR THAT IT WAS 4000 FT LOW! THANK YOU ACR Y -- WHOEVER YOU WERE! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS FLYING A B757-200 ACFT. HE COULD NOT BELIEVE THAT HE ACCEPTED THE ISSUED ALT. THE PLT IS VERY GRATEFUL THAT AT LEAST ONE PLT IN THE ARR STREAM QUESTIONED THE CTLR'S CLRNC.