# Proposed AD FAA-2010-0229: Bombardier, Inc., Model DHC-8-400 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-14-11
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 17, 2010, 75 FR 12710
- Comments due: May 3, 2010
- Became: [AD 2010-14-11](https://openairdocs.org/ad/2010-14-11)
- Docket: FAA-2010-0229 (https://www.regulations.gov/docket/FAA-2010-0229, where comments are filed)
- Project: 2009-NM-115-AD
- FR document: 2010-5858
- Official PDF: https://openairdocs.org/files/sha256/5f/fc/5ffc6abda8001f3e5c0eb5acfda24304c3feb349ae8f4731f7947e3cd05e3cdd (from https://www.govinfo.gov/content/pkg/FR-2010-03-17/pdf/2010-5858.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/03/17/2010-5858/airworthiness-directives-bombardier-inc-model-dhc-8-400-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/866781C200BCFBC5862576EA004B304C.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0229

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Certain main landing gear components have experienced premature failure during certification testing. Revision has been made to the DHC-8-400 Maintenance Requirements Manual, Airworthiness Limitation Items, to incorporate the revised safe life limits for the main landing gear lock actuator assembly, retraction actuator assembly rod end and piston, and the upper bearing in the main landing gear shock strut assembly. Failure of these components could adversely affect the structural integrity of the main landing gear. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Mar 17, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-5858, comments due May 3, 2010 (https://www.federalregister.gov/documents/2010/03/17/2010-5858/airworthiness-directives-bombardier-inc-model-dhc-8-400-series-airplanes)

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