B757-200
Flight Crew Air Transport Pilot (ATP)
Troubleshooting; Workload; Training / Qualification; Situational Awareness
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Declared Emergency
Aircraft
On final flap retraction; received a LE Slat Disagree EICAS message.  Complied with all applicable checklists and procedures; burned off fuel in holding to comply with max landing gross weight.  Returned for alternate flap extension 20 landing per QRH procedures with slats locked between 1 and 0.  Declared an emergency shortly after indications; had emergency crew inspect our brakes for high temperatures after landing.
A B757-200 EICAS alerted LE SLAT DISAGREE during the final flap retraction; so the QRH was completed; the flaps returned to 20; an emergency declared and the flight returned to the departure airport where a high brake temperature inspection was completed.