DC3 FLT CREW LAND WITHOUT CLRNC.

Narrative

CONDUCTING A PART 135 PROFICIENCY AND COMPETENCY CHK FOR A CAPT. AFTER BEING CLRED FOR A PRACTICE ILS APCH AT ZZZ; I FAILED THE GPS RADIO (ALSO USED AS LOC RECEIVER). WE FAILED TO CALL THE TWR ON #2 RADIO TO RECEIVE A LNDG CLRNC -- WHICH HAD; IN FACT; BEEN GIVEN. INEXPERIENCED SIC/CAPT WAS MAKING RADIO XMISSIONS; MONITORING COPLT'S ACTIONS AND DEALING WITH A SIMULATED FAILED ENG. I 'CAUSED' THE SITUATION AND; WHEN THE CAPT AND/OR COPLT DIDN'T SEE THE PROB; SHOULD HAVE MADE SURE WE WERE IN CONTACT WITH THE TWR. ON SHORT FINAL; I REALIZED THE PROB (OUR COM SELECTOR WAS SET TO THE #1 FAILED GPS/COM RECEIVER). I GOT OFF THE JUMPSEAT AND SWITCHED TO #2. THE LCL CTLR ASKED IF WE'D HEARD HIS PREVIOUSLY ISSUED LNDG CLRNCS. HE WAS POLITE BUT CONCERNED AND I ACKNOWLEDGED OUR MISTAKE. WE DISCUSSED THE NEED FOR BETTER CREW COORD AND THE CAPT ACKNOWLEDGED THAT; SIMULATED OR 'FOR REAL;' THE RESPONSIBILITY FOR SAFE; LEGAL OP IS HIS. I NEED TO BE MORE AWARE OF THE POTENTIAL CONSEQUENCES WHEN SIMULATING FAILURES AND EMERS. HUMAN FACTORS: HEAT; STRESS AND FATIGUE CONTRIBUTED TO THE EVENT. ALSO THE INEXPERIENCE OF THE SIC. ANOTHER FACTOR WAS THE SIMULATION OF 2 EMERS ON THE APCH.