# Proposed AD FAA-2018-0160: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-22-03
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 9, 2018, 83 FR 10408
- Comments due: April 23, 2018
- Became: [AD 2018-22-03](https://openairdocs.org/ad/2018-22-03)
- Docket: FAA-2018-0160 (https://www.regulations.gov/docket/FAA-2018-0160, where comments are filed)
- FR document: 2018-04720
- Official PDF: https://openairdocs.org/files/sha256/bb/87/bb873c04fd481324a14e5c8f9d2e6d8b07a35be339570d0f939c658e0db9854f (from https://www.govinfo.gov/content/pkg/FR-2018-03-09/pdf/2018-04720.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/03/09/2018-04720/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5441812B5928C8628625824B0052DFA0.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0160

## Summary

We propose to supersede Airworthiness Directive (AD) 2016-24- 03, which applies to certain Bombardier, Inc., Model DHC-8-400 series airplanes. AD 2016-24-03 requires repetitive detailed inspections of barrel nuts and cradles, a check of the bolt torque of the preload indicating (PLI) washers, and corrective actions if necessary. Since we issued AD 2016-24-03, the manufacturer has developed a modification that, when incorporated, terminates the repetitive inspections. This proposed AD would require modifying the airplane by installing a sealing disk to a certain location and replacing certain barrel nuts. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 9, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-04720, comments due Apr 23, 2018 (https://www.federalregister.gov/documents/2018/03/09/2018-04720/airworthiness-directives-bombardier-inc-airplanes)

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