Narrative:

On approach to yakota AFB, japan. WX 200' obscured, 1 mi fog, wind calm. RVR runway 36 2400'. RVR varied between 1800' to 3000'. We were early to airport and had to hold till curfew over. WX at hold was 1 1/2 mi 4000 RVR. We asked for early approach but they could not comply. When finally cleared for approach WX had deteriorated. It was my leg, I asked the captain if he wanted to accomplish a coupled approach, as is required by our flight operations manual with those WX conditions. Captain said no, for me to hand fly the approach. I restated our requirement for a couple approach. Winds during the approach resulted in drift angles as much as 9 degree and a tailwind component of 30 KTS. Under 1000' the winds died down and approach was normal down to 350', at which time I lost my flight director and glide slope indications. This was intermittent and captain's instruments were ok. At decision height I was slightly right of course and 1/2 DOT high on glide slope. I suggested we go around, but captain said he had approach lights in sight and to continue. He then took over visually and attempted to land. Landing would have occurred right of centerline, but a go around was initiated. Next approach we coupled and it resulted in normal landing. My flight director and glide slope failed again and B autoplt failed. We should have coupled the approach from the start and should have gone around sooner when my instruments failed and we had no runway in sight.

Related reports:

Google
 

Original NASA ASRS Text

Title: PIC OF WDB ELECTS TO HAVE FO MAKE IMC APCH WITH LIMITS POSSIBLY LESS THAN CAT II USING RAW DATA, NOT COUPLED. ATTEMPTS TO COMPLETE LNDG WHEN BECOMING VISUAL IN SPITE OF FO ADVISING RIGHT OF CENTERLINE AND HIGH ON GLIDE SLOPE. PERFORMS MISSED APCH AND COUPLES NEXT APCH FOR SUCCESSFUL LNDG.

Narrative: ON APCH TO YAKOTA AFB, JAPAN. WX 200' OBSCURED, 1 MI FOG, WIND CALM. RVR RWY 36 2400'. RVR VARIED BETWEEN 1800' TO 3000'. WE WERE EARLY TO ARPT AND HAD TO HOLD TILL CURFEW OVER. WX AT HOLD WAS 1 1/2 MI 4000 RVR. WE ASKED FOR EARLY APCH BUT THEY COULD NOT COMPLY. WHEN FINALLY CLRED FOR APCH WX HAD DETERIORATED. IT WAS MY LEG, I ASKED THE CAPT IF HE WANTED TO ACCOMPLISH A COUPLED APCH, AS IS REQUIRED BY OUR FLT OPS MANUAL WITH THOSE WX CONDITIONS. CAPT SAID NO, FOR ME TO HAND FLY THE APCH. I RESTATED OUR REQUIREMENT FOR A COUPLE APCH. WINDS DURING THE APCH RESULTED IN DRIFT ANGLES AS MUCH AS 9 DEG AND A TAILWIND COMPONENT OF 30 KTS. UNDER 1000' THE WINDS DIED DOWN AND APCH WAS NORMAL DOWN TO 350', AT WHICH TIME I LOST MY FLT DIRECTOR AND GLIDE SLOPE INDICATIONS. THIS WAS INTERMITTENT AND CAPT'S INSTRUMENTS WERE OK. AT DECISION HEIGHT I WAS SLIGHTLY RIGHT OF COURSE AND 1/2 DOT HIGH ON GLIDE SLOPE. I SUGGESTED WE GO AROUND, BUT CAPT SAID HE HAD APCH LIGHTS IN SIGHT AND TO CONTINUE. HE THEN TOOK OVER VISUALLY AND ATTEMPTED TO LAND. LNDG WOULD HAVE OCCURRED RIGHT OF CENTERLINE, BUT A GO AROUND WAS INITIATED. NEXT APCH WE COUPLED AND IT RESULTED IN NORMAL LNDG. MY FLT DIRECTOR AND GLIDE SLOPE FAILED AGAIN AND B AUTOPLT FAILED. WE SHOULD HAVE COUPLED THE APCH FROM THE START AND SHOULD HAVE GONE AROUND SOONER WHEN MY INSTRUMENTS FAILED AND WE HAD NO RWY IN SIGHT.

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.