Narrative:

While on approach to bna on the ILS runway 31; I became disoriented and veered to the left of course; full deflection of the course needle. ATC queried with a low altitude alert about the time we broke out from the ceiling and discovered we were 200-300 yards left of centerline from the runway approximately 3/4 - 1 mi out on the approach. I believe my severe fatigue from a busy flight schedule recently and the attendant stress and lack of sleep the 2 prior nights were the leading factors. Because I had not had restful sleep; the fatigue caused me to fixate on maintaining GS to the exclusion of lateral course guidance. Contributing factors were lack of many approaches to minimums in last 2 months; first flight in this make and model in nearly a month; ATC holding us high; and a straight-in approach from off of the volls 6 arrival. I had to work hard to slow for the approach and get configured. The PNF was not adequately monitoring my approach due to other duties and thus did not catch my error in maintaining course. Fortunately; we did break out and were able to make a successful landing. This situation could have gone horribly wrong if the WX were lower and ATC failed to warn us. I should have asked for delaying vectors to have more time to set up for the approach and ensure the PNF was properly monitoring. Also; once I noticed the deviation I should have gone missed approach and set up better for the second approach. I basically froze up due to the rushed descent/approach and was overwhelmed by fatigue.

Related reports:

Google
 

Original NASA ASRS Text

Title: LEAR FLT CREW HAS A TRACK HDG DEV DURING THE ILS 31 APCH TO BNA.

Narrative: WHILE ON APCH TO BNA ON THE ILS RWY 31; I BECAME DISORIENTED AND VEERED TO THE L OF COURSE; FULL DEFLECTION OF THE COURSE NEEDLE. ATC QUERIED WITH A LOW ALT ALERT ABOUT THE TIME WE BROKE OUT FROM THE CEILING AND DISCOVERED WE WERE 200-300 YARDS L OF CTRLINE FROM THE RWY APPROX 3/4 - 1 MI OUT ON THE APCH. I BELIEVE MY SEVERE FATIGUE FROM A BUSY FLT SCHEDULE RECENTLY AND THE ATTENDANT STRESS AND LACK OF SLEEP THE 2 PRIOR NIGHTS WERE THE LEADING FACTORS. BECAUSE I HAD NOT HAD RESTFUL SLEEP; THE FATIGUE CAUSED ME TO FIXATE ON MAINTAINING GS TO THE EXCLUSION OF LATERAL COURSE GUIDANCE. CONTRIBUTING FACTORS WERE LACK OF MANY APPROACHES TO MINIMUMS IN LAST 2 MONTHS; FIRST FLT IN THIS MAKE AND MODEL IN NEARLY A MONTH; ATC HOLDING US HIGH; AND A STRAIGHT-IN APCH FROM OFF OF THE VOLLS 6 ARR. I HAD TO WORK HARD TO SLOW FOR THE APCH AND GET CONFIGURED. THE PNF WAS NOT ADEQUATELY MONITORING MY APCH DUE TO OTHER DUTIES AND THUS DID NOT CATCH MY ERROR IN MAINTAINING COURSE. FORTUNATELY; WE DID BREAK OUT AND WERE ABLE TO MAKE A SUCCESSFUL LNDG. THIS SITUATION COULD HAVE GONE HORRIBLY WRONG IF THE WX WERE LOWER AND ATC FAILED TO WARN US. I SHOULD HAVE ASKED FOR DELAYING VECTORS TO HAVE MORE TIME TO SET UP FOR THE APCH AND ENSURE THE PNF WAS PROPERLY MONITORING. ALSO; ONCE I NOTICED THE DEV I SHOULD HAVE GONE MISSED APCH AND SET UP BETTER FOR THE SECOND APCH. I BASICALLY FROZE UP DUE TO THE RUSHED DSCNT/APCH AND WAS OVERWHELMED BY FATIGUE.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.