Narrative:

On sep/xx/94, while en route from bil to sff, my husband requested a 'comfort stop.' as we were 10 NM west of mso, I elected to return there. After taxiing to the ramp and shutting down, my husband experienced a period of unconsciousness. This led to his hospitalization in missoula and tests which indicated he required coronary bypass surgery. He elected to have this done in the seattle area where we reside. He returned to seattle via commercial air on sep/xx/94. After seeing him off, I departed for bfi. I was aware that I was under more than normal stress and filed IFR although the WX was clear over the entire area. I also verbalized each checklist, frequency and navigation item to myself, with 1 exception. On arriving in the seattle approach area I elected to fly the localizer back course to runway 31L, bfi. I had been cleared for the approach and had intercepted the localizer. I noted a small deviation of the CDI needle to the left and corrected -- to the left. As the needle deflected fully, I positively idented the runway, corrected my position and realized what my error had been. I could have done a visual approach but elected at the last min to do the localizer back course. As 3 airports are in very close proximity I desired to be precise in my approach. Unfortunately I was much less precise than desired. I truly believe the added stress of my husbands situation was a primary factor in my neglecting to thoroughly 'brief' myself on the approach. I knew I was close to home and quite likely let down my defenses.

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Original NASA ASRS Text

Title: HDG TRACK DEV ON IAP LOC BACK COURSE APCH.

Narrative: ON SEP/XX/94, WHILE ENRTE FROM BIL TO SFF, MY HUSBAND REQUESTED A 'COMFORT STOP.' AS WE WERE 10 NM W OF MSO, I ELECTED TO RETURN THERE. AFTER TAXIING TO THE RAMP AND SHUTTING DOWN, MY HUSBAND EXPERIENCED A PERIOD OF UNCONSCIOUSNESS. THIS LED TO HIS HOSPITALIZATION IN MISSOULA AND TESTS WHICH INDICATED HE REQUIRED CORONARY BYPASS SURGERY. HE ELECTED TO HAVE THIS DONE IN THE SEATTLE AREA WHERE WE RESIDE. HE RETURNED TO SEATTLE VIA COMMERCIAL AIR ON SEP/XX/94. AFTER SEEING HIM OFF, I DEPARTED FOR BFI. I WAS AWARE THAT I WAS UNDER MORE THAN NORMAL STRESS AND FILED IFR ALTHOUGH THE WX WAS CLR OVER THE ENTIRE AREA. I ALSO VERBALIZED EACH CHKLIST, FREQ AND NAV ITEM TO MYSELF, WITH 1 EXCEPTION. ON ARRIVING IN THE SEATTLE APCH AREA I ELECTED TO FLY THE LOC BC TO RWY 31L, BFI. I HAD BEEN CLRED FOR THE APCH AND HAD INTERCEPTED THE LOC. I NOTED A SMALL DEV OF THE CDI NEEDLE TO THE L AND CORRECTED -- TO THE L. AS THE NEEDLE DEFLECTED FULLY, I POSITIVELY IDENTED THE RWY, CORRECTED MY POS AND REALIZED WHAT MY ERROR HAD BEEN. I COULD HAVE DONE A VISUAL APCH BUT ELECTED AT THE LAST MIN TO DO THE LOC BACK COURSE. AS 3 ARPTS ARE IN VERY CLOSE PROX I DESIRED TO BE PRECISE IN MY APCH. UNFORTUNATELY I WAS MUCH LESS PRECISE THAN DESIRED. I TRULY BELIEVE THE ADDED STRESS OF MY HUSBANDS SIT WAS A PRIMARY FACTOR IN MY NEGLECTING TO THOROUGHLY 'BRIEF' MYSELF ON THE APCH. I KNEW I WAS CLOSE TO HOME AND QUITE LIKELY LET DOWN MY DEFENSES.

Data retrieved from NASA's ASRS site as of July 2007 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.