Hi Hawk21, Buzz here. If our aircraft (UAL) are at the gate, the parking brake is set and NLG chocks are all that's needed. When we park away from the terminal we chock the mains.
At UAL we have set the parking brake as long as i remember with no ill effects. I wonder why other operators release the brakes when they park?
Many years ago at SFO
Service Center,on the old wash rack we'd park a 747 overnight. They seem to be light on the nose - at least when empty. One gusty night when the winds were crosswind to the old wash rack spot, the 747 squirmed over 5 or 6 feet, the NLG had been put on the centerline at the beginning of the night. By sunrise the NLG tires were 5 or 6 feet over as that Classic Lump had tried to weather-vane into the wind.
I'm a beliver in chocking the MLG...
Buzz Fuselsausage: Line Mechanic by night, DC-3 Crew Chief by choice, taildragger pilot for fun.