A B767-300 flight crew received a leading edge slat asymmetry message on EICAS after takeoff. They talked to maintenance; declared an emergency; and returned to departure airport.

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Attributes
ACN	718205
Time
Date	200611
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 1500
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 3000
ASRS Report	718205
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 100 flight time total : 9000 flight time type : 1600
ASRS Report	718206
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas message other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Departed normally. During flap retraction; got a leading edge slat asymmetry EICAS message and also leading edge light. Went to checklist and talked to maintenance controller. Returned to ZZZ for problem to be fixed. No unusual action required other than landing overweight and higher than normal airspeed. Declared emergency; requested landing runway xxr. Landing uneventful. Taxied to gate. Hot brakes as expected. Gave plane to maintenance to troubleshoot and fix.

Original NASA ASRS Text

Title: A B767-300 FLT CREW RECEIVED A LEADING EDGE SLAT ASYMMETRY MESSAGE ON EICAS AFTER TKOF. THEY TALKED TO MAINT; DECLARED AN EMER; AND RETURNED TO DEP ARPT.

Narrative: DEPARTED NORMALLY. DURING FLAP RETRACTION; GOT A LEADING EDGE SLAT ASYMMETRY EICAS MESSAGE AND ALSO LEADING EDGE LIGHT. WENT TO CHKLIST AND TALKED TO MAINT CTLR. RETURNED TO ZZZ FOR PROB TO BE FIXED. NO UNUSUAL ACTION REQUIRED OTHER THAN LNDG OVERWT AND HIGHER THAN NORMAL AIRSPD. DECLARED EMER; REQUESTED LNDG RWY XXR. LNDG UNEVENTFUL. TAXIED TO GATE. HOT BRAKES AS EXPECTED. GAVE PLANE TO MAINT TO TROUBLESHOOT AND FIX.

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.