# Proposed AD FAA-2020-0101: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-09-12
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 24, 2020, 85 FR 10344
- Comments due: April 9, 2020
- Became: [AD 2020-09-12](https://openairdocs.org/ad/2020-09-12)
- Docket: FAA-2020-0101 (https://www.regulations.gov/docket/FAA-2020-0101, where comments are filed)
- FR document: 2020-03353
- Official PDF: https://openairdocs.org/files/sha256/a3/c0/a3c0c23ac95e82855c1c289decd109cbc67bdc523f44ed76d2b255769266a968 (from https://www.govinfo.gov/content/pkg/FR-2020-02-24/pdf/2020-03353.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/02/24/2020-03353/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2626900E9B99548D86258518004F03A9.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0101

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This proposed AD was prompted by a report that certain elevator power control unit (PCU) arm fittings have nonconforming fillet radii. This proposed AD would require an inspection for affected elevator PCU assemblies, inspections of affected elevator PCU arm fittings for nonconforming fillet radii and cracks, replacement if necessary, and re-identification of the affected elevator PCU assemblies. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 24, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-03353, comments due Apr 9, 2020 (https://www.federalregister.gov/documents/2020/02/24/2020-03353/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

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