---
kind: "section"
citation: "14 C.F.R. § 49.51"
title: "14"
number: "49.51"
heading: "Applicability."
url: "https://uscodex.org/cfr/14/49.51"
---

# §49.51. Applicability.


This subpart applies to the recording of the following kinds of conveyances:

- (a) Any lease, a notice of tax lien or other lien (except a notice of Federal tax lien referred to in [§ 49.17 (a)](/cfr/14/49.17.md?p=a), and any mortgage, equipment trust, contract of conditional sale, or other instrument executed for security purposes, which affects title to, or any interest in, any aircraft engine, propeller, or appliance maintained by or on behalf of an air carrier certificated under [49 U.S.C. 44705](/usc/49/44705.md) for installation or use in aircraft, aircraft engines, or propellers, or any spare parts, maintained at a designated location or locations by or on behalf of such an air carrier.
- (b) **An assignment or amendment of, or supplement to, an instrument named in paragraph (a) of this section.**
- (c) A release, cancellation, discharge, or satisfaction of a conveyance named in paragraph [(a)](#a) or [(b)](#b) of this section.

## Notes

### Amendments

[Doc. No. 1996, 29 FR 6486, May 19, 1964, as amended by Amdt. 49-5, 35 FR 802, Jan. 21, 1970; Amdt. 49-10, 70 FR 246, Jan. 3, 2005]

### Authority

Authority: 4 U.S.T. 1830; Pub. L. 108-297, 118 Stat. 1095 (49 U.S.C. 40101 note, 49 U.S.C. 44101 note); 49 U.S.C. 106(f), 40113-40114, 44101-44108, 44110-44113, 44701, 44704, 44713, 45302, 46104, 46301.

### Source

Source: Docket No. 1996, 29 FR 6486, May 19, 1964, unless otherwise noted.

### Amendments

[Doc. No. 1996, 29 FR 6486, May 19, 1964, as amended by Amdt. 49-5, 35 FR 802, Jan. 21, 1970; Amdt. 49-10, 70 FR 246, Jan. 3, 2005]