PLT COMPLAINT ABOUT OTHER ACFT IN HIS AIRSPACE.

Narrative

I WAS ACTING AS PIC FOR AN INSTRUMENT STUDENT. WE HAD FILED AN IFR FLT PLAN FROM ONTARIO TO PAYET V-4 BOI. ONTARIO IS AN UNCTLED ARPT WITH AN NDB APCH. WE WERE NOT ABLE TO CONTACT SALT LAKE CENTER ON THE GND. WE DEPARTED S AND TANNED AND FLEW E IN VFR CONDITIONS CONTACTING SALT LAKE CENTER; WHO SAID THEY WOULD NOT BE ABLE TO ACTIVATE OUR IFR CLRNC UNTIL 05. HE SAID HE HAD AN ACFT 6 MI S ON APCH FOR THE ONTARIO ARPT. WE PROCEEDED E; VFR; CLBING TO 5000' VFR. THE TOPS IN THE AREA WERE slightly ABOVE 4000'. WE HEARD THE ACFT WHO WAS CLRED FOR THE APCH MAKE A RADIO XMISSION ON SALT LAKE CENTER FREQ. WE NEVER DID HEAR SLC CLR HIM FOR AN APCH; SO HE MUST HAVE BEEN CLRD BEFORE WE CAME ON FREQ. THE OTHER ACFT HAD NOT CHANGED OVER TO ADVISORY FREQ 122.8 ONTARIO UNICOM AFTER BEING CLRED FOR APCH. THE OTHER ACFT FILED A COMPLAINT THAT WE WERE FLYING IFR IN AIRSPACE ASSIGNED TO HIM FOR APCH. WE WERE 6-7 MI E OF THE ARPT AT THE TIME OF THE INCIDENT AND MAINTAINED VFR CONDITIONS. THE STUDENT INSTRUMENT PLT WAS UNDER THE HOOD DURING THE CLB AND DEP.