B737 Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Total 10936; Flight Crew Type 656
Aircraft Equipment Problem Less Severe
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Departed; at about 800 ft I noticed that I couldn't trim the aircraft nose up but nose down was working. I continued to hand fly and my FO (First Officer) ran the QRH. We called dispatch; tried on VHF with no luck and then HF. Got a patch with dispatch and [Maintenance Control]. [Maintenance Control] said follow the QRH; as we did. I advised the lead flight attendant of our situation. [Advised ATC] as a precaution and requested to have the emergency equipment standing by. Landed runway XX; flaps 15 everything was normal; taxied to the gate.
B737 Captain reported the elevator trim only worked in the pitch down direction.