They very much do have to respond within X days as determined by law. If the application takes more than 120 days they must inform the applicant what the issue

They very much do have to respond within X days as determined by law. If the application takes more than 120 days they must inform the applicant what the issue preventing approval is and they must issue a determination by 180 days [1]. Crazy to think that the people writing this stuff might sometimes have already thought of that idea from HN commenter #3937408. > If FAA does not respond to the revision request within X days, it should be considered approved. this is obviously absurd and completely ripe for abuse. Regulations are intended to protect the public interest, the government failing its duty in one aspect (timeliness) doesn't void its duties to public health and safety, protection of property, national security, etc. [1] see section C and 413.15: https://www.ecfr.gov/current/title-14/chapter-III/subchapter-C/part-450/subpart-D/section-450.211 https://www.ecfr.gov/current/title-14/chapter-III/subchapter...