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B757 flight crew receive leading edge slat disagreement message during approach for landing; declares emergency and lands without incident.
| Attributes | |
| ACN | 698280 |
| Time | |
| Date | 200605 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 698280 |
| 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 other flight crewa other flight crewb |
| Resolutory Action | flight crew : landed as precaution flight crew : overcame equipment problem flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
On previous flight ZZZ1-ZZZ2 on initial approach into ZZZ1 at approximately 4000 ft; went to extend flaps 1 degree and received message leading edge slat disagreement; accompanied by the leading edge light. Accomplished the appropriate checklist and extended flaps 20 degrees with alternate flap selector. Used checklist approach of vref 20 degrees; 142 KTS. At 152 KIAS; received stick shaker and flew an approach at 160 KTS; automatic brakes 4 degrees and had an uneventful landing and rollout. We declared an emergency with ZZZ1 as a precaution and had the emergency equipment standing by. On next leg; ZZZ1-ZZZ2 decided to debrief leading edge slat disagreement checklist again; just in case it happened again in going back to ZZZ2. They had flown a mechanic into ZZZ1 from ZZZ3 to repair the aircraft. He was unable to duplicate the flight control malfunction. We had the same situation; except that we were familiar with the procedure. Requested crash fire rescue equipment to stand by again; declared an emergency just as a precaution; extended our final approach and landed without incident.
Original NASA ASRS Text
Title: B757 FLT CREW RECEIVE LEADING EDGE SLAT DISAGREEMENT MESSAGE DURING APCH FOR LNDG; DECLARES EMER AND LANDS WITHOUT INCIDENT.
Narrative: ON PREVIOUS FLT ZZZ1-ZZZ2 ON INITIAL APCH INTO ZZZ1 AT APPROX 4000 FT; WENT TO EXTEND FLAPS 1 DEG AND RECEIVED MESSAGE LEADING EDGE SLAT DISAGREEMENT; ACCOMPANIED BY THE LEADING EDGE LIGHT. ACCOMPLISHED THE APPROPRIATE CHKLIST AND EXTENDED FLAPS 20 DEGS WITH ALTERNATE FLAP SELECTOR. USED CHKLIST APCH OF VREF 20 DEGS; 142 KTS. AT 152 KIAS; RECEIVED STICK SHAKER AND FLEW AN APCH AT 160 KTS; AUTO BRAKES 4 DEGS AND HAD AN UNEVENTFUL LNDG AND ROLLOUT. WE DECLARED AN EMER WITH ZZZ1 AS A PRECAUTION AND HAD THE EMER EQUIP STANDING BY. ON NEXT LEG; ZZZ1-ZZZ2 DECIDED TO DEBRIEF LEADING EDGE SLAT DISAGREEMENT CHKLIST AGAIN; JUST IN CASE IT HAPPENED AGAIN IN GOING BACK TO ZZZ2. THEY HAD FLOWN A MECH INTO ZZZ1 FROM ZZZ3 TO REPAIR THE ACFT. HE WAS UNABLE TO DUPLICATE THE FLT CTL MALFUNCTION. WE HAD THE SAME SITUATION; EXCEPT THAT WE WERE FAMILIAR WITH THE PROC. REQUESTED CFR TO STAND BY AGAIN; DECLARED AN EMER JUST AS A PRECAUTION; EXTENDED OUR FINAL APCH AND LANDED WITHOUT INCIDENT.
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.