Air carrier flight crew reported Stabilizer Trim failed on initial climb and a return to the departure airport.

Date: 2025-07 · Aircraft: B737 Undifferentiated or Other Model · Phase: takeoff

Anomalies: aircraft-equipment-problem-critical

Synopsis

Air carrier flight crew reported Stabilizer Trim failed on initial climb and a return to the departure airport.

Narrative

After takeoff the landing gear failed to retract. We coordinated with ATC for a heading and altitude to work the problem. We ran the Gear Fails to Retract checklist; which lead to the Landing Gear Disagree checklist in the QRH. After running the QRH the gear successfully retracted and we began to continue the flight and with ATC coordination selected a higher altitude. The aircraft would not climb and began to descend; at which point we turned off the automation and discovered a SPEED TRIM FAIL Light and the electric trim would not work. The (Max) SPEED TRIM FAIL checklist did not address the electric trim failure. We determined that the (Max) Stabilizer Trim Inoperative checklist was the most appropriate and ran that QRH procedure. With the Stab Trim Cutout switched in CUTOUT the manual trim would not work. The result was that there was no elevator trim working. We completed their QRH procedure and coordinated with Dispatch and Maintenance Control via ARINC to verify the correct procedure; and determine if there were any other options. We all determined the that this was the correct QRH procedure and the best course of action was to return and land at ZZZ. The Captain briefed the flight attendants; and then the passengers. We requested priority handling with ATC; finished all appropriate checklists and landed and returned to a gate uneventfully.

Second reporter narrative

Shortly after takeoff the landing gear failed to retract (both green and red gear indicator lights illuminated). Ran the Landing Gear Disagree checklist in the QRH; the Checklist fixed the problem; we then asked ATC for a higher altitude. The Captain noted that the aircraft would not climb and began to descend; after disengaging the autopilot and autothrottle we noticed the SPEED TRIM FAIL Light and the electric trim would not work; later on while running the QRH we found out that the manual trim was jammed as well. The (Max) SPEED TRIM FAIL checklist did not fix the electric trim failure. We determined that the (Max) Stabilizer Trim Inoperative checklist was the most appropriate and ran that QRH procedure. As previously noted; the Stab Trim Cutout switched in CUTOUT the manual trim would not work resulting in no elevator trim working. We completed the QRH procedure and coordinated with Dispatch and Maintenance Control via ARINC both the verify the correct procedure; and determine if there were any other options. We all agreed the best course of action was to return and land at ZZZ. The Captain briefed the flight attendants; and then the passengers. We requested priority handling with ATC; finished all appropriate checklists and landed uneventfully.

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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.