B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 22000
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
After takeoff; I raised the landing gear handle and the left main landing gear failed to retract; followed by a 'GEAR DISAGREE' message. The First Officer continued to fly while I notified ATC and the relief pilot retrieved the checklist. The relief pilot and I accomplished the GEAR DISAGREE checklist. We held and contacted dispatch and [maintenance]. After reviewing our situation; we all agreed that our flight could not continue to [our international destination]. I [advised ATC]; proceeded to obtain vectors over the ocean and dumped fuel. After dumping was complete; we continued to fly around and burn fuel to get below max landing weight. Once below our max landing weight; we headed back toward [departure airport]. Even though our landing gear indicated down and locked I called for emergency vehicles standing by as a precaution. An uneventful landing followed.
B767 Captain reported returning to departure airport after receiving a GEAR DISAGREE warning light after takeoff.