Would doubt that AA would send a 777 across the Pacific with only 153 pax onboard
AA 777 has 237 seats. F18 C56 Y163.
That's 65% load factor, or two-thirds full. Which for low season in February is probably not too bad for the route. Transpacific routes also tend to do much better than transatlantic for selling cargo capacity, so there will be a lot of revenue under the floorboards as well.