INST INSTRUCTOR LEVELED AT ALT BELOW ALT CALLED FOR ON MISSED APCH PROC. CTLR CAUGHT DEV AND ADVISED.

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PIC WAS ON AN IFR FLT FOR TRAINING. UPON COMPLETION OF THE FIRST LOC BACK COURSE INST APCH TO RWY 17; A LOW APCH WAS REQUESTED; AUTH; AND EXECUTED BEFORE A CLB TO 1000 FT MSL ON RWY 17 HDG WAS COMMENCED. AFTER BEING CLRED BY TWR TO SWITCH TO APCH; THE SWITCH WAS MADE AND RWY 17 HDG AND LEVEL AT 1000 FT MSL RPTED. APCH ACKNOWLEDGED THE RPT AND DIRECTED A TURN TO 300 DEGS WHICH WAS ACKNOWLEDGED AND EXECUTED. UPON COMPLETION OF THE TURN TO 300 DEG MAGNETIC HDG; PIC RPTED STEADY-UP 300 DEGS MAGNETIC HDG AND LEVEL 1000 FT MSL; WHICH WAS ACKNOWLEDGED BY APCH. THIS WAS THE FIRST TIME PIC HAD EVER RECALLED BEING TURNED TO THE W UPON THE COMPLETION OF A LOC BACK COURSE RWY 17 INST APCH. PIC MADE THE HDG AND ALT CALL BECAUSE THE LOC BACK COURSE RWY 17 INST APCH INITIAL ALT IS 1600 FT MSL AND APCH DID NOT GIVE AN ADDITIONAL CLB INSTRUCTION UPON DIRECTING A TURN FROM RWY HDG. AFTER APCH ACKNOWLEDGED THE 300 DEG MAGNETIC HDG AND LEVEL 1000 FT MSL CALL; PIC THOUGHT THAT APCH WAS HAVING PIC STAY AT 1000 FT MSL FOR A REASON AND PIC DID NOT CLARIFY IF A HIGHER ALT WAS REQUIRED. A SHORT TIME LATER APCH INFORMED PIC THAT PIC SHOULD BE AT 1600 FT MSL INSTEAD OF THE PREVIOUSLY RPTED ALT OF 1000 FT MSL. AFTER THE DIRECTED CLB WAS EXECUTED THE SECOND LOC BACK COURSE RWY 17 INST APCH WAS AUTH AND CONDUCTED. PIC SHOULD HAVE FOLLOWED HIS INSTINCTS AND EARLIER VERIFIED WITH APCH IF APCH WANTED PIC AT A HIGHER ALT AFTER THE TURN TOWARDS THE W AWAY FROM THE RWY HDG OF 170 DEGS MAGNETIC HDG.