David S Shavertown , PA August 27, 2021 Appliance: General Electric Free Standing Microwave SCA1001FSS001 Ge Microwave Sca1001fss001: Microwave sparking and arcing. How to replace Wave Guide - Mica Cover. Easy fix, replaced the mica sheet and problem was solved. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes