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A B757-200 on approach at 4000 ft declared an emergency due to slat disagreement EICAS message with confirmed asymmetry when flaps selected to 1 degree.
| Attributes | |
| ACN | 420311 |
| Time | |
| Date | 199811 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 0 msl bound upper : 4000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Navigation In Use | Other |
| Flight Phase | landing other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 420311 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
Narrative:
While being vectored for an ILS approach to runway 35C at dfw, and while configuring for landing, leading edge slat disagreement message appeared on the EICAS screen while extending flaps to 1 degree. I confirmed the asymmetry and declared an emergency with dfw tower. Requested maneuvering airspace, gave the aircraft to the first officer, and proceeded to accomplish the checklist procedures for flap asymmetry in the operating manual. After finishing the checklist, landed with flaps 20 degrees, and upon arrival, proceeded to the gate for maintenance action. Review of the logbook resulted in determining that this was a repeat write-up on this aircraft.
Original NASA ASRS Text
Title: A B757-200 ON APCH AT 4000 FT DECLARED AN EMER DUE TO SLAT DISAGREEMENT EICAS MESSAGE WITH CONFIRMED ASYMMETRY WHEN FLAPS SELECTED TO 1 DEG.
Narrative: WHILE BEING VECTORED FOR AN ILS APCH TO RWY 35C AT DFW, AND WHILE CONFIGURING FOR LNDG, LEADING EDGE SLAT DISAGREEMENT MESSAGE APPEARED ON THE EICAS SCREEN WHILE EXTENDING FLAPS TO 1 DEG. I CONFIRMED THE ASYMMETRY AND DECLARED AN EMER WITH DFW TWR. REQUESTED MANEUVERING AIRSPACE, GAVE THE ACFT TO THE FO, AND PROCEEDED TO ACCOMPLISH THE CHKLIST PROCS FOR FLAP ASYMMETRY IN THE OPERATING MANUAL. AFTER FINISHING THE CHKLIST, LANDED WITH FLAPS 20 DEGS, AND UPON ARR, PROCEEDED TO THE GATE FOR MAINT ACTION. REVIEW OF THE LOGBOOK RESULTED IN DETERMINING THAT THIS WAS A REPEAT WRITE-UP ON THIS ACFT.
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.