AA.I.G.K5FAA-S-ACS-11A · Nov 2023Knowledge
14 CFR part 135 subparts A, B, C, D, E, F, G (ASEL, ASES).
14 CFR part 135 subparts A, B, C, D, E, F, G (ASEL, ASES).
Bottom line
In unscheduled one- and two-pilot crews, total flight time in all commercial flying may not exceed 500 hours in any calendar quarter.
Key numbers
| Number | What it means |
|---|---|
| 500 hours in any calendar quarter (one- or two-pilot crew, all commercial flying) | Quarterly flight time |
| 8 hours in any 24 consecutive hours (one-pilot flight crew) | Daily single-pilot |
| at least 13 rest periods of at least 24 consecutive hours each, per calendar quarter | Quarterly rest days |
| at least 30 days at the principal operations base | Load manifest retention |
FAA references
- 14 CFR 135.267 (Flight time limitations and rest requirements: Unscheduled one- and two-pilot crews.) — eCFR current as of 2026-03-05
- 14 CFR 135.63 (Recordkeeping requirements.) — eCFR current as of 2026-03-05
- 14 CFR 135.21 (Manual requirements.) — eCFR current as of 2026-03-05
- 14 CFR 135.293 (Initial and recurrent pilot testing requirements.) — eCFR current as of 2026-03-05
- 14 CFR 135.1 (Applicability.) — eCFR current as of 2026-03-05
- 14 CFR 135.77 (Responsibility for operational control.) — eCFR current as of 2026-03-05
- 14 CFR 135.243 (Pilot in command qualifications.) — eCFR current as of 2026-03-05
- 14 CFR 135.323 (Training program: General.) — eCFR current as of 2026-03-05
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