HDG TRACK DEV DURING IAP LOC DME BACK COURSE APCH.

Narrative

KMCI GAR LOC BACK COURSE RWY 27 AT APPROX XY45Z JAN/SAT/92. FLT WITH COPLT FLYING; WAS VECTORED BY MCI APCH TO INTERCEPT THE LOC BACK COURSE 27 AT KMCI AND CLRED FOR THE APCH AT 4000 MSL. WE JOINED THE LOC BACK COURSE 27 E OF EXURT; BTWN EXURT AND MIZZO (FAF) WITH ACFT ON AUTOPLT. ACFT CAPTURED THE LOC AND TURNED 30 DEG TO SW (HDG 240 DEGS +/-); WHILE THE CAPT (PNF) WAS BACKING UP FO WITH ALTS AND DISTANCES FOR THE NON PAR APCH; CAPT WAS ALSO READING CHKLIST AND CHANGING FREQ TO TWR (KMCI). CAPT WAS IN RAW DATA MODE (HSI VERSUS MAP) AND ACFT WAS SLIGHTLY L OF LOC CTRLINE (1/2 DOT AT 8-9 MI OUT FROM RWY). THE NEXT TIME I SCANNED MY HSI THE ACFT WAS S OF COURSE AND HDG APPROX 240 DEGS. CAPT TOLD COPLT TO þGET BACK ON COURSEþ AND COMPLETED CALL TO KMCI TWR. BY THE TIME (10-15 SECONDS) KMCI TWR GAVE US A HDG; I HAD ALREADY INITIATED A GAR BY HAVING THE FO TURN BACK TO LOC HDG. THE CREW COMPLIED AND AGREED WITH KMCI OF A GAR AND TURNED TO THE ISSUED HDG. THE ACFT WAS OUTSIDE OF MIZZO (FAF) AT 3000 MSL. CREW COMPLETED SECOND APCH AND LNDG IN NORMAL MANNER. APCH PROBLEM WAS IDENTIFIED BY CREW AS INADVERTENT COUPLING OF AUTOPLT TO LOC ON A BACK COURSE APCH INSTEAD OF USING A HDG SEL. NOTE: ALL APCH BRIEFINGS AND RADIO TUNING AND IDENTS WERE DONE AS PER NORMAL PROC INCLUDING RAW DATA ON HSI FOR PNF (CAPT). SUGGEST THAT ALL BRIEFINGS INCLUDE A WORD ABOUT USE OF AUTOPLTS AND APCH COUPLERS ON THE INST APCH BRIEF SINCE THIS TYPE OF ACH IS NOT FLOWN VERY OFTEN (IT HAS BEEN OVER A YR SINCE THIS CAPT HAD FLOWN A LOC BACK COURSE IN THE SIMULATOR AND HAD RECENTLY BEEN TO LGT UPGRADE SCHOOL).