Curv Aero RESOURCES
FAA Part 77 & Aviation Airspace Resources
Plain-English guides to FAA obstruction evaluation: when notice is required, how to file Form 7460-1, and what the FAA does with it.
Start with the rule, then the form.
- 14 CFR Part 77
14 CFR 77.9 Notice Criteria: When You Must File Form 7460-1
The 200 ft rule, the 100:1, 50:1 and 25:1 notice surfaces, roads and railroads, on-airport work and the exceptions, with worked examples.
Read guide - FAA Form 7460-1 · OE/AAA
How to File FAA Form 7460-1: A Step-by-Step Guide
Deadlines, what each of the 21 form items means, coordinate and height rules, common mistakes and what happens after you file.
Read guide
Not sure whether you need to file?
The CurvAero Part 77 Report checks a coordinate and height against every 77.9 criterion.