United Flight Turns Back to Sydney After Fluid Leak

United Airlines Flight 830, a Boeing 777-300, turned around midflight from Sydney to San Francisco due to a reported "maintenance issue"
Video showed fluid leaking from the wheel area during takeoff; the plane returned to Sydney about 2 hours later
167 passengers and 16 crew members were on board; they received overnight accommodations and were rebooked
Incident happened the same day 50 people were injured when a LATAM 787-9 "dipped dramatically" during flight to New Zealand
Occurred after recent United incidents involving a 777-200 losing a wheel in San Francisco and a 737 MAX 8 skidding off the runway in Houston