---
kind: "section"
citation: "14 C.F.R. § 91.405"
title: "14"
number: "91.405"
heading: "Maintenance required."
url: "https://uscodex.org/cfr/14/91.405"
---

# §91.405. Maintenance required.


Each owner or operator of an aircraft—

- (a) Shall have that aircraft inspected as prescribed in [subpart E](/cfr/14/subpartE.md) of this part and shall between required inspections, except as provided in [paragraph (c)](#c) of this section, have discrepancies repaired as prescribed in [part 43](/cfr/14/part43.md) of this chapter;
- (b) Shall ensure that maintenance personnel make appropriate entries in the aircraft maintenance records indicating the aircraft has been approved for return to service;
- (c) Shall have any inoperative instrument or item of equipment, permitted to be inoperative by [§ 91.213(d)(2)](/cfr/14/91.213.md?p=d-2) of this part, repaired, replaced, removed, or inspected at the next required inspection; and
- (d) When listed discrepancies include inoperative instruments or equipment, shall ensure that a placard has been installed as required by [§ 43.11](/cfr/14/43.11.md) of this chapter.

## Notes

### Source

Source: Docket 18334, 54 FR 34311, Aug. 18, 1989, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 40101, 40103, 40105, 40113, 40120, 44101, 44111, 44701, 44704, 44709, 44711, 44712, 44715,44716, 44717, 44722, 44740, 46306, 46315, 46316, 46504, 46506-46507, 47122, 47508,47528-47531, 47534; Pub. L. 112-95, 126 Stat. 11; Pub. L. 114-190, 130 Stat. 615 (49 U.S.C. 44703 note); sec. 828, Pub. L. 118-63, 138 Stat. 1330 (49 U.S.C. 44703 note); articles 12 and 29 of the Convention on International Civil Aviation, 61 Stat. 1180.