Narrative:

While on final approach to runway 28R at sfo, as the flap handle was selected to 5 degrees, the flap position remained at flaps 1 degree, the EICAS displayed an amber trailing edge flap disagree and the trailing edge flap light illuminated. The captain performed a missed approach and ATC vectored us in a box pattern while we troubleshot the problem. The appropriate abnormal procedures checklist in the flight manual were followed, resulting in an alternate extension of flaps to 20 degrees, for landing. ATC, dispatch and the flight attendants were advised we were going to make a landing in sfo with flaps 20 degrees. ATC cleared us for an ILS runway 28R approach. On base leg, the captain declared an emergency with ATC and asked to have the emergency equipment on the ground standing by. The landing with flaps 20 degrees was uneventful. The event progressed smoothly despite the fact that both flight crew members were on a body clock time of about XA00.

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Original NASA ASRS Text

Title: AN EICAS WARNING OF A TRAILING EDGE FLAP PROB ALERTS THE CREW OF A B767-300 FOR 20 DEG FLAP APCH AND EMER LNDG AT SFO, CA.

Narrative: WHILE ON FINAL APCH TO RWY 28R AT SFO, AS THE FLAP HANDLE WAS SELECTED TO 5 DEGS, THE FLAP POS REMAINED AT FLAPS 1 DEG, THE EICAS DISPLAYED AN AMBER TRAILING EDGE FLAP DISAGREE AND THE TRAILING EDGE FLAP LIGHT ILLUMINATED. THE CAPT PERFORMED A MISSED APCH AND ATC VECTORED US IN A BOX PATTERN WHILE WE TROUBLESHOT THE PROB. THE APPROPRIATE ABNORMAL PROCS CHKLIST IN THE FLT MANUAL WERE FOLLOWED, RESULTING IN AN ALTERNATE EXTENSION OF FLAPS TO 20 DEGS, FOR LNDG. ATC, DISPATCH AND THE FLT ATTENDANTS WERE ADVISED WE WERE GOING TO MAKE A LNDG IN SFO WITH FLAPS 20 DEGS. ATC CLRED US FOR AN ILS RWY 28R APCH. ON BASE LEG, THE CAPT DECLARED AN EMER WITH ATC AND ASKED TO HAVE THE EMER EQUIP ON THE GND STANDING BY. THE LNDG WITH FLAPS 20 DEGS WAS UNEVENTFUL. THE EVENT PROGRESSED SMOOTHLY DESPITE THE FACT THAT BOTH FLT CREW MEMBERS WERE ON A BODY CLOCK TIME OF ABOUT XA00.

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.