# Proposed AD FAA-2021-0032: Hamilton Sundstrand Corporation Propellers; Initial Regulatory Flexibility Analysis

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-08-10
- Action: Initial regulatory flexibility analysis (IRFA); request for comment.
- Published: July 28, 2021, 86 FR 40376
- Comments due: September 13, 2021
- Became: [AD 2022-08-10](https://openairdocs.org/ad/2022-08-10)
- Docket: FAA-2021-0032 (https://www.regulations.gov/docket/FAA-2021-0032, where comments are filed)
- Project: AD-2020-01314-P
- FR document: 2021-15979
- Official PDF: https://openairdocs.org/files/sha256/7f/4f/7f4f7792d12860bb693a851141aee208244232465364314198c6d3a64939f76f (from https://www.govinfo.gov/content/pkg/FR-2021-07-28/pdf/2021-15979.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/07/28/2021-15979/airworthiness-directives-hamilton-sundstrand-corporation-propellers-initial-regulatory-flexibility
- Page: https://openairdocs.org/proposed/FAA-2021-0032

## Summary

The FAA is publishing and requesting comments on this IRFA for the previously published notice of proposed rulemaking (NPRM), Project Identifier AD-2020-01314-P, applicable to Hamilton Sundstrand Corporation 54H model propellers with a 54H60 model propeller hub installed. That NPRM proposed to supersede Airworthiness Directive (AD) 2020-12-07, which applies to certain Hamilton Sundstrand Corporation (Hamilton Sundstrand) 54H model propellers.

## Notices in this docket

- Feb 25, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-03607, comments due Apr 12, 2021 (https://www.federalregister.gov/documents/2021/02/25/2021-03607/airworthiness-directives-hamilton-sundstrand-corporation-propellers)
- Jul 28, 2021: Initial regulatory flexibility analysis (IRFA); request for comment., FR document 2021-15979, comments due Sep 13, 2021 (https://www.federalregister.gov/documents/2021/07/28/2021-15979/airworthiness-directives-hamilton-sundstrand-corporation-propellers-initial-regulatory-flexibility)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.