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EMB175 captain reports failure of slats to extend when selected during approach. After QRH procedure (return flap lever to previous position) the flaps and slats extend normally. Maintenance can find no faults. The anomaly repeats on the next leg with the same outcome. This time maintenance detected possible faults in the flap/slat computer or the flap lever.
| Attributes | |
| ACN | 1075285 |
| Time | |
| Date | 201303 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Component | |
| Aircraft Component | Flap Control (Trailing & Leading Edge) |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
[During approach] the slats failed to deploy on first attempt. Slats did deploy after QRH checklist procedure was competed. A normal flaps five landing was accomplished. The aircraft was returned to service: 'message cleared. No defects noted. A/C found to be in transitory condition.' on [the next] flight the slats again failed to deploy on first attempt; but the slats deployed subsequent to QRH checklist procedure. Maintenance found possible electrical faults in sf-ace one and/or the slat/flap deployment lever. Fdr's were pulled in accordance with NTSB reportable event requirements.
Original NASA ASRS Text
Title: EMB175 Captain reports failure of slats to extend when selected during approach. After QRH procedure (return flap lever to previous position) the flaps and slats extend normally. Maintenance can find no faults. The anomaly repeats on the next leg with the same outcome. This time Maintenance detected possible faults in the Flap/slat computer or the flap lever.
Narrative: [During approach] the slats failed to deploy on first attempt. Slats did deploy after QRH checklist procedure was competed. A normal flaps five landing was accomplished. The aircraft was returned to service: 'message cleared. No defects noted. A/C found to be in transitory condition.' On [the next] flight the Slats again failed to deploy on first attempt; but the slats deployed subsequent to QRH checklist procedure. Maintenance found possible electrical faults in SF-ACE one and/or the slat/flap deployment lever. FDR's were pulled in accordance with NTSB reportable event requirements.
Data retrieved from NASA's ASRS site as of July 2013 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.