B7676-300 crew had an EICAS warning 'leading edge slat disagree' going into san.

Attributes
ACN	629481
Time
Date	200408
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : ensel
Altitude	msl single value : 35000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level descent : intermediate altitude
Route In Use	enroute : pacific
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer pilot : instrument pilot : multi engine pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 14500 flight time type : 800
ASRS Report	629481
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas le slat disagree other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated controller : provided flight assist controller : issued new clearance flight crew : overcame equipment problem other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After passing edsel at FL350 and mach .810, the leading edge light, leading edge slat, disagree EICAS and the caution light all came on. The QRH advises that in this case we would be limited to flaps 20 degrees for landing. We got a phone patch to dispatch and maintenance control and asked dispatch to verify that we would still be legal to land on runway 27 in san using flaps 20 degrees. We asked maintenance control for any ideas that might help correct the problem. Maintenance control was unable to offer any suggestions to 'fix' the problem, and dispatch advised landing at lax would be a 'better option.' we advised ATC of our change in destination and our situation, and they asked if we were declaring an emergency. We advised, 'not at his time!' approximately 5 mins later ATC advised us that they had declared an emergency on our behalf. We began descent a little bit early and at 7000 ft and prior to reaching sli, attempted to extend the leading edge slats using the procedure in the QRH. When we selected alternate leading edge flaps, all caution and EICAS lights extinguished immediately. We selected flaps 1 degree and they extended as expected. We got another phone patch through to dispatch, explained to them and maintenance control what we had done and what had resulted, and with the advice and consent of both decided to proceed to san. We advised socal and were issued a new clearance to san. We also cancelled the emergency that they had initiated for us. We landed in san normally and without incident.

Original NASA ASRS Text

Title: B7676-300 CREW HAD AN EICAS WARNING 'LEADING EDGE SLAT DISAGREE' GOING INTO SAN.

Narrative: AFTER PASSING EDSEL AT FL350 AND MACH .810, THE LEADING EDGE LIGHT, LEADING EDGE SLAT, DISAGREE EICAS AND THE CAUTION LIGHT ALL CAME ON. THE QRH ADVISES THAT IN THIS CASE WE WOULD BE LIMITED TO FLAPS 20 DEGS FOR LNDG. WE GOT A PHONE PATCH TO DISPATCH AND MAINT CTL AND ASKED DISPATCH TO VERIFY THAT WE WOULD STILL BE LEGAL TO LAND ON RWY 27 IN SAN USING FLAPS 20 DEGS. WE ASKED MAINT CTL FOR ANY IDEAS THAT MIGHT HELP CORRECT THE PROB. MAINT CTL WAS UNABLE TO OFFER ANY SUGGESTIONS TO 'FIX' THE PROB, AND DISPATCH ADVISED LNDG AT LAX WOULD BE A 'BETTER OPTION.' WE ADVISED ATC OF OUR CHANGE IN DEST AND OUR SIT, AND THEY ASKED IF WE WERE DECLARING AN EMER. WE ADVISED, 'NOT AT HIS TIME!' APPROX 5 MINS LATER ATC ADVISED US THAT THEY HAD DECLARED AN EMER ON OUR BEHALF. WE BEGAN DSCNT A LITTLE BIT EARLY AND AT 7000 FT AND PRIOR TO REACHING SLI, ATTEMPTED TO EXTEND THE LEADING EDGE SLATS USING THE PROC IN THE QRH. WHEN WE SELECTED ALTERNATE LEADING EDGE FLAPS, ALL CAUTION AND EICAS LIGHTS EXTINGUISHED IMMEDIATELY. WE SELECTED FLAPS 1 DEG AND THEY EXTENDED AS EXPECTED. WE GOT ANOTHER PHONE PATCH THROUGH TO DISPATCH, EXPLAINED TO THEM AND MAINT CTL WHAT WE HAD DONE AND WHAT HAD RESULTED, AND WITH THE ADVICE AND CONSENT OF BOTH DECIDED TO PROCEED TO SAN. WE ADVISED SOCAL AND WERE ISSUED A NEW CLRNC TO SAN. WE ALSO CANCELLED THE EMER THAT THEY HAD INITIATED FOR US. WE LANDED IN SAN NORMALLY AND WITHOUT INCIDENT.

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.