FDA Form 483 is used to document deficiencies observed during an FDA inspection. The investigator presents it during the closing meeting of the inspection. After being issued, the form is also sent to the responsible district office, which is in charge of evaluating the inspection. Depending on the significance of the noted deficiencies, a Warning Letter may follow as the next regulatory action. Issued FDA 483 documents are also made publicly available on the FDA's website.
https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/inspection-references/inspection-observations