Narrative:

Aircraft X required an autoland flight confidence check. I thought we kept same aircraft next 3 legs of duty period. No CAT ii/III runways at phx or pbi, so elected to do check at dfw. Severe clear dfw winds 190 degrees at 10 KTS. No lahso clearance given in our landing clearance. We continued to monitor runway environment all the way down final. Traffic landed ahead of us by a good 3 mi and was well clear of runway. Landing appeared normal, and stable approach. Flared ok at 50 ft, but then at about 30 ft, nosed over and autoplt kicked off. I grabbed it and landed on mains first, but with a moderate bounce, not what I would consider an actual 'hard' landing -- but firm. I had 8 yrs right seat MD80 before moving to left seat last fall. Aircraft X was written up in logbook as check failed. In retrospect, think it may be possible that there was unseen interference in the ILS critical area, though I saw none. I know tower will not protect ILS critical area when WX is above 800 ft 2 DME, especially at busy fields. Now that we have to do these flight confidence checks more often, I wonder how good an idea it is to try to do them at busy fields during good WX days. From now on, I know I will only attempt such checks at outstations or WX below 800 ft 2 DME at busy fields.

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Original NASA ASRS Text

Title: AN MD80 CREW, WHILE PERFORMING AN AUTOLAND CHK AT DFW, EXPERIENCED A NOSE OVER AND AUTOPLT DISCONNECT AT 30 FT.

Narrative: ACFT X REQUIRED AN AUTOLAND FLT CONFIDENCE CHK. I THOUGHT WE KEPT SAME ACFT NEXT 3 LEGS OF DUTY PERIOD. NO CAT II/III RWYS AT PHX OR PBI, SO ELECTED TO DO CHK AT DFW. SEVERE CLR DFW WINDS 190 DEGS AT 10 KTS. NO LAHSO CLRNC GIVEN IN OUR LNDG CLRNC. WE CONTINUED TO MONITOR RWY ENVIRONMENT ALL THE WAY DOWN FINAL. TFC LANDED AHEAD OF US BY A GOOD 3 MI AND WAS WELL CLR OF RWY. LNDG APPEARED NORMAL, AND STABLE APCH. FLARED OK AT 50 FT, BUT THEN AT ABOUT 30 FT, NOSED OVER AND AUTOPLT KICKED OFF. I GRABBED IT AND LANDED ON MAINS FIRST, BUT WITH A MODERATE BOUNCE, NOT WHAT I WOULD CONSIDER AN ACTUAL 'HARD' LNDG -- BUT FIRM. I HAD 8 YRS R SEAT MD80 BEFORE MOVING TO L SEAT LAST FALL. ACFT X WAS WRITTEN UP IN LOGBOOK AS CHK FAILED. IN RETROSPECT, THINK IT MAY BE POSSIBLE THAT THERE WAS UNSEEN INTERFERENCE IN THE ILS CRITICAL AREA, THOUGH I SAW NONE. I KNOW TWR WILL NOT PROTECT ILS CRITICAL AREA WHEN WX IS ABOVE 800 FT 2 DME, ESPECIALLY AT BUSY FIELDS. NOW THAT WE HAVE TO DO THESE FLT CONFIDENCE CHKS MORE OFTEN, I WONDER HOW GOOD AN IDEA IT IS TO TRY TO DO THEM AT BUSY FIELDS DURING GOOD WX DAYS. FROM NOW ON, I KNOW I WILL ONLY ATTEMPT SUCH CHKS AT OUTSTATIONS OR WX BELOW 800 FT 2 DME AT BUSY FIELDS.

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.