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