Air carrier flight crew reported returning to departure airport for a safe landing after experiencing a Leading Edge Flap Disagreement issue.
Synopsis
Air carrier flight crew reported returning to departure airport for a safe landing after experiencing a Leading Edge Flap Disagreement issue.
Narrative
After takeoff while retracting the flaps from 1 degree to 0 we experienced a flap disagreement EICAS and warning message and light. The Captain was the Pilot Flying and stopped the climb at 6000 ft. and engaged the autopilot to access the situation. The Leading Edge Flap Disagreement had occurred while the flaps were retracting. The aircraft was kept within airspeed limits and the Flap Disagreement Checklist was called for after determining that was the issue. Approach Control was notified and they assisted in helping us coordinate with ATC and ground equipment should we need them. After the checklist was completed and thoroughly discussed with the First Officer and myself; we elected to return back to ZZZ for a non-normal landing. All checklist and tables were addressed and the flap disagreement only allowed us to use flaps 15 for the return approach back to the airport. Dispatch and Operations were also notified of our return. A successful approach and landing was accomplished with the favorable winds. The aircraft was taxied back into the ramp where the [responding] equipment was released and the aircraft was given to Maintenance for review and repair. A thorough debrief was conducted with Maintenance to educate them of what happened and steps that helped us safely return the aircraft back to ZZZ.
Second reporter narrative
After takeoff while selecting flaps up; we received a Leading Edge Slat Disagree message. We leveled off at 6000 ft. while the Captain managed the airspeed. We ran the checklist which led us to the Leading Edge Slat Checklist. We then notified ZZZ and Dispatch of the situation. We ran the disagreement checklist which then led to a trailing edge disagree message. We landed at flaps 15 uneventful. Taxied to the ramp and debriefed the Mechanics to help with the identification of the problem.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.