Narrative:

It was the copilot's leg and a CAT I ILS approach had been briefed. I checked in with approach and was given new WX. The WX was now very close to CAT I minimums, so we briefed for a CAT III autoland approach. The brief was completed as we descended through about 11000 ft. At 10300 ft, we were cleared to 7000 ft. I was turning on the landing lights, when the 7000 ft clearance was transmitted. I read back the clearance, set 7000 ft in the altitude window and apparently forgot to cycle the seatbelt sign twice to signal descent below 10000 ft. The autoplt landed the airplane very smoothly. As we taxied to the gate, the 'a' flight attendant told us that they were all 3 standing up in the galley during landing, because we had failed to tell them to situation down. I realized then, that I had failed to make the call on the PA for flight attendants to be seated. I normally turn the landing lights on and cycle the seatbelt sign at the same time. I then use the landing lights as confirmation that I have given the flight attendants the 10000 ft warning. I must have been interrupted by the altitude change at 10300 ft and missed the flight attendant signal. I can't explain how they could have missed the noise of the landing gear extension but was very embarrassed that I had not seated them for landing.

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Original NASA ASRS Text

Title: PLT RPT, THE CAPT FORGOT TO TELL THE CABIN ATTENDANTS TO BE SEATED FOR LNDG.

Narrative: IT WAS THE COPLT'S LEG AND A CAT I ILS APCH HAD BEEN BRIEFED. I CHKED IN WITH APCH AND WAS GIVEN NEW WX. THE WX WAS NOW VERY CLOSE TO CAT I MINIMUMS, SO WE BRIEFED FOR A CAT III AUTOLAND APCH. THE BRIEF WAS COMPLETED AS WE DSNDED THROUGH ABOUT 11000 FT. AT 10300 FT, WE WERE CLRED TO 7000 FT. I WAS TURNING ON THE LNDG LIGHTS, WHEN THE 7000 FT CLRNC WAS XMITTED. I READ BACK THE CLRNC, SET 7000 FT IN THE ALT WINDOW AND APPARENTLY FORGOT TO CYCLE THE SEATBELT SIGN TWICE TO SIGNAL DSCNT BELOW 10000 FT. THE AUTOPLT LANDED THE AIRPLANE VERY SMOOTHLY. AS WE TAXIED TO THE GATE, THE 'A' FLT ATTENDANT TOLD US THAT THEY WERE ALL 3 STANDING UP IN THE GALLEY DURING LNDG, BECAUSE WE HAD FAILED TO TELL THEM TO SIT DOWN. I REALIZED THEN, THAT I HAD FAILED TO MAKE THE CALL ON THE PA FOR FLT ATTENDANTS TO BE SEATED. I NORMALLY TURN THE LNDG LIGHTS ON AND CYCLE THE SEATBELT SIGN AT THE SAME TIME. I THEN USE THE LNDG LIGHTS AS CONFIRMATION THAT I HAVE GIVEN THE FLT ATTENDANTS THE 10000 FT WARNING. I MUST HAVE BEEN INTERRUPTED BY THE ALT CHANGE AT 10300 FT AND MISSED THE FLT ATTENDANT SIGNAL. I CAN'T EXPLAIN HOW THEY COULD HAVE MISSED THE NOISE OF THE LNDG GEAR EXTENSION BUT WAS VERY EMBARRASSED THAT I HAD NOT SEATED THEM FOR LNDG.

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.