As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND @ EXTERNAL FUSELAGE SKIN WASTE SERVICING CUTOUT. REPAIR WORK DONE IAW SRM 51-70-03 AND ETD 2019-170-067922. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.