# AC 91-42D: Hazards of Rotating Propeller and Helicopter Rotor Blades

- Type: Advisory circular (guidance, not mandatory unless a rule or AD requires it)
- Status: Historical
- Approved: March 3, 1983
- Last reviewed: October 24, 2024
- This change: Canceled by Memo signed by Rick Domingo (AFS-1); dated 11/09/2018.
- Family: AC 91-42
- Cancels: [AC 91-42C](https://openairdocs.org/ac/91-42C)
- 14 CFR parts: 1
- Pages: 6
- PDF: https://openairdocs.org/files/sha256/81/5c/815cd8dec348660d6b1b65e1fb15a874fd2ffc4d4b67b5875f54c5efb5c2f060
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/38A9C2ADACBE78DF862569E7007464EC.0001
- DRS record last changed: November 22, 2025
- Page: https://openairdocs.org/ac/91-42

## Versions

- [AC 91-42D](https://openairdocs.org/ac/91-42) (Historical), approved Mar 3, 1983, 6 pages. Canceled by Memo signed by Rick Domingo (AFS-1); dated 11/09/2018.

## Text

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

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