B737 captain reported that the landing gear did not fully retract after takeoff.

Attributes
ACN	1509173
Time
Date	201801
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Landing Gear
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 1360
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Upon departure first officer (first officer) attempted to retract gear. Tower approved level off at 4000 ft; and sent us to departure frequency. We proceeded to use the gear disagree QRH. The landing gear lever was in the up position with all red and green landing gear indicator lights illuminated. As directed by the QRH; we opened and closed the manual gear extension door. We recycled the landing gear lever down then up. All landing gear indicator lights extinguished; and the landing gear lever was placed in the off position. We continued to [destination] and landed uneventfully; where we were quickly met and debriefed by maintenance personnel.

Original NASA ASRS Text

Title: B737 Captain reported that the landing gear did not fully retract after takeoff.

Narrative: Upon departure FO (First Officer) attempted to retract gear. Tower approved level off at 4000 ft; and sent us to Departure frequency. We proceeded to use the Gear Disagree QRH. The landing gear lever was in the UP position with all red and green landing gear indicator lights illuminated. As directed by the QRH; we opened and closed the manual gear extension door. We recycled the landing gear lever down then up. All landing gear indicator lights extinguished; and the landing gear lever was placed in the OFF position. We continued to [destination] and landed uneventfully; where we were quickly met and debriefed by maintenance personnel.

Data retrieved from NASA's ASRS site 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.