# Proposed AD FAA-2022-0394: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-13-08
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 6, 2022, 87 FR 19813
- Comments due: May 23, 2022
- Became: [AD 2022-13-08](https://openairdocs.org/ad/2022-13-08)
- Docket: FAA-2022-0394 (https://www.regulations.gov/docket/FAA-2022-0394, where comments are filed)
- Project: MCAI-2021-00904-T
- FR document: 2022-07159
- Official PDF: https://openairdocs.org/files/sha256/bc/e1/bce16e9187e78948dbda575bb613e7f2a9c85e1b6c3d87576fc0b7d91a7d619b (from https://www.govinfo.gov/content/pkg/FR-2022-04-06/pdf/2022-07159.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/04/06/2022-07159/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-07159-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0394

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes. This proposed AD was prompted by reports of nose wheel steering (NWS) hydraulic motors jamming during pushback or towing. This proposed AD would require doing an inspection to determine the part number and serial number of the NWS hydraulic motor, and re-identifying or replacing the NWS hydraulic motor if necessary. This proposed AD would also prohibit the installation of certain NWS hydraulic motors. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 6, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-07159, comments due May 23, 2022 (https://www.federalregister.gov/documents/2022/04/06/2022-07159/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

---
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.