# Additional aircraft category/class rating course ground training — commercial pilot certificate — FAA flight training hour minimums: Part 61 vs Part 141, by certificate and rating

For Additional aircraft category/class rating course ground training, certificate or rating is Additional aircraft category/class rating course ground training — commercial pilot certificate; part 141 minimum is 15-hour ground training course for an additional class rating or a 20-hour ground training course for an additional aircraft category and class rating; part 141 appendix is Part 141 Appendix I, para. 3(c), recorded from its source on 2026-08-18.

- **Certificate or rating:** Additional aircraft category/class rating course ground training — commercial pilot certificate _(our reading, not quoted from the source)_
- **Part 141 minimum:** 15-hour ground training course for an additional class rating or a 20-hour ground training course for an additional aircraft category and class rating _(verified: appears in the quote below)_
- **Part 141 appendix:** Part 141 Appendix I, para. 3(c) _(our reading, not quoted from the source)_

## What the source says

> ( c ) For a commercial pilot certificate, the following aeronautical knowledge areas must be included in a 15-hour ground training course for an additional class rating or a 20-hour ground training course for an additional aircraft category and class 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/).