Tech found upstairs system void of refrigerant. Tech pressurized system and found outdoor coil distributor has rubbed on discharge line and leaked entire refrigerant charge. Tech let office know of findings. Mike Acree is running mandatory. Customer chose repair. Tech flowed nitrogen while brazing leaking distributor tube and replaced filter drier. Separated remaining tubes with foam tape. System passed nitrogen pressure test at 200 psi and standing vacuum test at 280 microns. Tech recharged system with 10 lbs 8 oz of new R410a plus 9 oz for 30 foot line set and tested system. No further issues found.