Narrative:

On taxi out from ZZZ1; extended flaps; and trailing edge flaps light and associated EICAS message appeared. Called maintenance; no help with problem. Returned to gate and maintenance worked the problem. Fscu #2 showed no data; they replaced fscu #2. Maintenance cycled flaps. Operations checked normal. Aircraft was to service. Flew aircraft to ZZZ2; I was PF. We were cleared visual approach to runway 31R. Flaps 1 degree were selected. Trailing edge flaps light and associated EICAS message appeared. Requested delay vectors and told ATC of flap problem. Xferred control to captain for remainder of flight. PF declared emergency and requested emergency equipment. Completed trailing edge flaps irregular procedure; and issued cabin advisory for flight attendants. Approach and landing were changed to runway 31L. Checklist called for landing flaps 20/20 reference alternate flaps. Fuel was approximately 10100 pounds on final. Target speed was 138 KTS. Landed without incident; made PA announcement 'remain seated' and canceled emergency equipment. Taxied to gate.

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Original NASA ASRS Text

Title: B757-200 FLT CREW HAS TRAILING EDGE FLAPS EICAS MESSAGE ON APCH TO JFK.

Narrative: ON TAXI OUT FROM ZZZ1; EXTENDED FLAPS; AND TRAILING EDGE FLAPS LIGHT AND ASSOCIATED EICAS MESSAGE APPEARED. CALLED MAINT; NO HELP WITH PROB. RETURNED TO GATE AND MAINT WORKED THE PROB. FSCU #2 SHOWED NO DATA; THEY REPLACED FSCU #2. MAINT CYCLED FLAPS. OPS CHKED NORMAL. ACFT WAS TO SVC. FLEW ACFT TO ZZZ2; I WAS PF. WE WERE CLRED VISUAL APCH TO RWY 31R. FLAPS 1 DEG WERE SELECTED. TRAILING EDGE FLAPS LIGHT AND ASSOCIATED EICAS MESSAGE APPEARED. REQUESTED DELAY VECTORS AND TOLD ATC OF FLAP PROB. XFERRED CTL TO CAPT FOR REMAINDER OF FLT. PF DECLARED EMER AND REQUESTED EMER EQUIP. COMPLETED TRAILING EDGE FLAPS IRREGULAR PROC; AND ISSUED CABIN ADVISORY FOR FLT ATTENDANTS. APCH AND LNDG WERE CHANGED TO RWY 31L. CHKLIST CALLED FOR LNDG FLAPS 20/20 REF ALTERNATE FLAPS. FUEL WAS APPROX 10100 LBS ON FINAL. TARGET SPD WAS 138 KTS. LANDED WITHOUT INCIDENT; MADE PA ANNOUNCEMENT 'REMAIN SEATED' AND CANCELED EMER EQUIP. TAXIED TO GATE.

Data retrieved from NASA's ASRS site as of January 2009 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.