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A B757-200 on approach was unable to extend the leading edge slats. On ground found slat drive torque tube not connected to power drive unit.
| Attributes | |
| ACN | 633091 |
| Time | |
| Date | 200410 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe technician : fcc |
| ASRS Report | 633091 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : company policies non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : l.e. slat indication other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : landed in emergency condition |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : inspection performance deficiency : installation performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company Environmental Factor Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Air carrier X aircraft landed amber alert due to leading edge would not extend. I assisted in troubleshooting and found left torque tube just outboard of left leading edge power drive unit was not connected. Checked area for hardware when access panels were removed. None found. Maintenance had replaced #4 slat sep/mon/04. Aircraft went to hangar at ZZZ and returned to service by mechanics. I am filing this report to document problem only.
Original NASA ASRS Text
Title: A B757-200 ON APCH WAS UNABLE TO EXTEND THE LEADING EDGE SLATS. ON GND FOUND SLAT DRIVE TORQUE TUBE NOT CONNECTED TO PWR DRIVE UNIT.
Narrative: ACR X ACFT LANDED AMBER ALERT DUE TO LEADING EDGE WOULD NOT EXTEND. I ASSISTED IN TROUBLESHOOTING AND FOUND L TORQUE TUBE JUST OUTBOARD OF L LEADING EDGE PWR DRIVE UNIT WAS NOT CONNECTED. CHKED AREA FOR HARDWARE WHEN ACCESS PANELS WERE REMOVED. NONE FOUND. MAINT HAD REPLACED #4 SLAT SEP/MON/04. ACFT WENT TO HANGAR AT ZZZ AND RETURNED TO SVC BY MECHS. I AM FILING THIS RPT TO DOCUMENT PROB ONLY.
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.