B757-200 crew had an EICAS warning 'leading edge slat disagree' message when extending flaps for lan...

Attributes
ACN	605339
Time
Date	200401
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : c90.tracon
State Reference	IL
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival star : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 7500 flight time type : 826
ASRS Report	605339
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Upon initial flap extension during vectors for the approach to runway 9R at ord, we received the EICAS status message of 'leading edge slat disagree' and the flap indicator froze between 'up' and '1 degree.' we notified chicago approach, ran the appropriate checklists, including the alternate flap extension checklist, gave the flight attendants a cabin advisory, made a PA announcement, had the emergency equipment standing by, and made a normal landing using trailing edge flaps 20 degrees. After landing, we queried the tower as to their observations. Both our indications and their observations were normal, so we taxied to gate and left the flaps/slats in their landing confign. During taxi in, we notified ramp and maintenance. Mechanics met the airplane and we completed a logbook write-up.

Original NASA ASRS Text

Title: B757-200 CREW HAD AN EICAS WARNING 'LEADING EDGE SLAT DISAGREE' MESSAGE WHEN EXTENDING FLAPS FOR LNDG.

Narrative: UPON INITIAL FLAP EXTENSION DURING VECTORS FOR THE APCH TO RWY 9R AT ORD, WE RECEIVED THE EICAS STATUS MESSAGE OF 'LEADING EDGE SLAT DISAGREE' AND THE FLAP INDICATOR FROZE BTWN 'UP' AND '1 DEG.' WE NOTIFIED CHICAGO APCH, RAN THE APPROPRIATE CHKLISTS, INCLUDING THE ALTERNATE FLAP EXTENSION CHKLIST, GAVE THE FLT ATTENDANTS A CABIN ADVISORY, MADE A PA ANNOUNCEMENT, HAD THE EMER EQUIP STANDING BY, AND MADE A NORMAL LNDG USING TRAILING EDGE FLAPS 20 DEGS. AFTER LNDG, WE QUERIED THE TWR AS TO THEIR OBSERVATIONS. BOTH OUR INDICATIONS AND THEIR OBSERVATIONS WERE NORMAL, SO WE TAXIED TO GATE AND LEFT THE FLAPS/SLATS IN THEIR LNDG CONFIGN. DURING TAXI IN, WE NOTIFIED RAMP AND MAINT. MECHS MET THE AIRPLANE AND WE COMPLETED A LOGBOOK WRITE-UP.

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.

B757-200 crew had an EICAS warning 'leading edge slat disagree' message when extending flaps for landing.