AA.I.G.K4FAA-S-ACS-11A · Nov 2023Knowledge
14 CFR part 121 subparts A, G, K, M, O, T, U, V (AMEL, AMES).
14 CFR part 121 subparts A, G, K, M, O, T, U, V (AMEL, AMES).
Bottom line
Under 14 CFR 121.2(f), no person may operate an airplane for which the type certificate application was filed after March 29, 1995 in part 121 operations unless it is type certificated under part 25. Each certificate holder must maintain at least one complete copy of the manual at its principal base of operations.
Key numbers
| Number | What it means |
|---|---|
| date of last revision on each page | Paper manuals |
| revision date immediately ascertainable | Electronic manuals |
| type certificate application filed after March 29, 1995 | Part 25 rule |
FAA references
- 14 CFR 121.2 (Compliance schedule for operators that transition to part 121; certain new entrant operators.) — eCFR current as of 2026-10-01
- 14 CFR 121.135 (Manual contents.) — eCFR current as of 2026-10-01
Build understanding you can use
Unlock the full lesson and continue studying this element.
- Full teaching sections: What it is; Key points; Rules and numbers; How it is done
- Check your understanding with answers you can reveal
- Common mistakes paired with the FAA facts that correct them