# Ground instructor — additional rating — FAA flight training hour minimums: Part 61 vs Part 141, by certificate and rating For Ground instructor, certificate or rating is Ground instructor — additional rating; part 141 minimum is 10 hours of training if the course is for an additional ground instructor rating; part 141 appendix is Part 141 Appendix H, para. 2(a)(2), recorded from its source on 2026-08-18. - **Certificate or rating:** Ground instructor — additional rating _(our reading, not quoted from the source)_ - **Part 141 minimum:** 10 hours of training if the course is for an additional ground instructor rating _(verified: appears in the quote below)_ - **Part 141 appendix:** Part 141 Appendix H, para. 2(a)(2) _(our reading, not quoted from the source)_ ## What the source says > ( 1 ) 20 hours of training if the course is for an initial issuance of a ground instructor certificate; or ( 2 ) 10 hours of training if the course is for an additional ground instructor rating. ## Source - https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-141 Last verified: 2026-08-18. Review by: 2027-08-18. Part of [FAA flight training hour minimums: Part 61 vs Part 141, by certificate and rating](https://referencesource.org/flight-training-hour-minimums-61-vs-141/).