STUCK MIKE LEADS TO MISSED APCH; THEN 2 ALTDEVS.

Narrative

MISSED APCH RWY 26R AT ATL DUE TO NO LNDG CLRNC. PROB WAS A STUCK MIKE DUE TO CAPT'S XMIT SWITCH IN YOKE. MISSED APCH WAS FLOWN BY FO. MISSED APCH INSTRUCTIONS WERE READ TO HER BY CAPT OFF ILS RWY 26R APCH PLATE AS THERE WAS NO RADIO CONTACT DURING THIS PHASE OF FLT WITH TWR OR APCH CTL. AFTER INITIAL TURN AND ALT GIVEN TO FO WHICH WAS 3500 FT; CAPT TURNED HIS ATTN TO THE RADIO PROB. APPROX 2-3 MINS LATER; I HEARD ALT ALERT HORN AND NOTICED WE WERE AT 3900 FT. I IMMEDIATELY DIRECTED FO TO DSND TO 3500 FT. SHE STARTED A DSCNT; WENT THROUGH 3500 FT AND WAS APCHING 3200 FT WHEN I TOOK THE ACFT FROM HER AND LEVELED OFF AT 3500 FT. I RETURNED THE ACFT TO HER AFTER I HAD CAPTURED THE ALT WITH THE AUTOPLT. I THEN CORRECTED THE RADIO PROB AND CONTACTED THE TWR. THE LNDG ON SECOND ATTEMPT WAS UNEVENTFUL. I FEEL THE PROB HERE WAS THE FACT THAT THE FO WAS INEXPERIENCED AND VERY UNCOMFORTABLE IN HER SEAT; AS LONG AS IT WAS VFR AND A LONG FINAL SHE WAS OK. BUT INCORPORATE SOME WX OR A SHORT TURN TO FINAL AND HER SITUATIONAL AWARENESS WAS LACKING. I SPENT MOST OF MY TIME WATCHING AND COACHING HER AND NOT PAYING ATTN TO OTHER ASPECTS OF MY JOB AS PNF. IN RETROSPECT; I GUESS I SHOULD HAVE TAKEN CTL OF THE ACFT AND LET HER TRY TO FIND OUT WHAT WAS WRONG WITH THE RADIOS.