Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 110; Flight Crew Total 8624; Flight Crew Type 4466
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
Near maximum takeoff weight; had to use runway not being utilized for normal departures; packs off takeoff. Shortly after gear retraction; EICAS warning indicated left main landing gear still down and locked with nose and right main gear retracted. Completed departure procedure; pack takeoff procedure; and notified departure of gear problem. Chose to restrict speed to 250 to comply with max landing gear extension/retraction speeds. Also stopped climb at FL200.After coordination with company dispatch and maintenance via SATCOM; a divert to [an alternate] was decided upon rather than a return to [departure airport] due to terrain and possible further potential problems in the event of a go-around and having to leave gear extended.[We advised] ATC; and headings were given to [the alternate]. Due to the heavy weight; we elected to dump fuel to reduce our landing weight. Coordination and approval was obtained from ATC for the dump. After dumping we prepared for a landing. The flight attendants were briefed; and then the passengers were informed of the issue and plan. Landing distance performance data for the overweight landing was obtained from dispatch; and the arrival and approach were briefed.The landing was made at a weight of 380;000 LBS with no issues. After landing; we taxied to remote parking; shut down the aircraft; and submitted the maintenance ACARS items for the gear as well as the overweight landing. Checking the landing gear synopsis page; we noticed one of the left main brake [temperatures] was higher than the rest; so after ensuring the aircraft was chocked and with approval of the maintenance technician we released the parking brake to facilitate cooling of the brakes.
B767 First Officer reported diverting to an alternate after one main landing gear failed to retract after takeoff.