# AC 20-14: Aircraft Airworthiness; Restricted Category: Certification of Aircraft with Uncertificated Engines or Engines to which Major Alterations have been made

- Type: Advisory circular (guidance, not mandatory unless a rule or AD requires it)
- Status: Historical
- Approved: October 25, 1963
- Last reviewed: July 6, 2006
- Family: AC 20-14
- 14 CFR parts: Unknown Part
- Pages: 3
- PDF: https://openairdocs.org/files/sha256/e4/bd/e4bd568bcecb98f8134adc64b9e9e2e7865c1d9fe901c25295001d3f8c8f198d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F87B4A3820B4E98A862571A20072AD2B.0001
- DRS record last changed: July 6, 2006
- Page: https://openairdocs.org/ac/20-14

## Versions

- [AC 20-14](https://openairdocs.org/ac/20-14) (Historical), approved Oct 25, 1963, 3 pages

## Text

Each page's text from the PDF; open the PDF at a page with #page=N.

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