# Proposed AD FAA-2012-0271: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-14-04
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 21, 2012, 77 FR 16488
- Comments due: May 7, 2012
- Became: [AD 2012-14-04](https://openairdocs.org/ad/2012-14-04)
- Docket: FAA-2012-0271 (https://www.regulations.gov/docket/FAA-2012-0271, where comments are filed)
- Project: 2011-NM-196-AD
- FR document: 2012-6805
- Official PDF: https://openairdocs.org/files/sha256/1e/33/1e33ea21677dfa8e599d5aa859a947f8c5f9a4ad9cbce4916b879c262b8e0d05 (from https://www.govinfo.gov/content/pkg/FR-2012-03-21/pdf/2012-6805.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/03/21/2012-6805/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D2A8FD8D4748E3DB862579C8004A1088.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0271

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-100, DHC-8-200, and DHC-8-300 series airplanes. This proposed AD was prompted by reports of hydraulic accumulator screw cap or end cap failure. This proposed AD would require replacing the affected parking brake accumulator. We are proposing this AD to prevent failure of the parking brake accumulator screw caps or end caps, which could result in loss of the number 2 hydraulic system and damage to airplane structures, and could potentially have an adverse effect on the controllability of the airplane.

## Notices in this docket

- Mar 21, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-6805, comments due May 7, 2012 (https://www.federalregister.gov/documents/2012/03/21/2012-6805/airworthiness-directives-bombardier-inc-airplanes)

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