# Proposed AD FAA-2015-0494: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-19-13
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 24, 2015, 80 FR 15521
- Comments due: May 8, 2015
- Became: [AD 2015-19-13](https://openairdocs.org/ad/2015-19-13)
- Docket: FAA-2015-0494 (https://www.regulations.gov/docket/FAA-2015-0494, where comments are filed)
- Project: 2014-NM-160-AD
- FR document: 2015-06579
- Official PDF: https://openairdocs.org/files/sha256/ee/71/ee71e31903c31d8110f7552adde7be58a8d76f743c29d305d8e339a9e67fc573 (from https://www.govinfo.gov/content/pkg/FR-2015-03-24/pdf/2015-06579.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/03/24/2015-06579/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9A3A0310DFBF3B7286257E12004A254D.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0494

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This proposed AD was prompted by reports of inadvertent deployment of a single outboard spoiler during flight. This proposed AD would require replacement of the power control units (PCUs) for the outboard spoilers with upgraded PCUs. We are proposing this AD to prevent leakage of the piston head seal and piston rod seals of the outboard spoiler PCUs, which could result in inadvertent spoiler deployment and reduced controllability of the airplane.

## Notices in this docket

- Mar 24, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-06579, comments due May 8, 2015 (https://www.federalregister.gov/documents/2015/03/24/2015-06579/airworthiness-directives-bombardier-inc-airplanes)

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