# Proposed AD FAA-2016-7427: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-23-07
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 15, 2016, 81 FR 45992
- Comments due: August 29, 2016
- Became: [AD 2016-23-07](https://openairdocs.org/ad/2016-23-07)
- Docket: FAA-2016-7427 (https://www.regulations.gov/docket/FAA-2016-7427, where comments are filed)
- Project: 2016-NM-041-AD
- FR document: 2016-16733
- Official PDF: https://openairdocs.org/files/sha256/0b/4d/0b4db323431faa06216956648a53bb00ba3e1e325980177f9e503ebcb9fad20b (from https://www.govinfo.gov/content/pkg/FR-2016-07-15/pdf/2016-16733.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/07/15/2016-16733/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E49F16E3D1F7D9BA86257FF1004E65BA.0001
- Page: https://openairdocs.org/proposed/FAA-2016-7427

## Summary

We propose to supersede Airworthiness Directive (AD) 2013-02- 08, for all Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. AD 2013-02-08 currently requires inspecting the trunnions and upper and lower pins of the horizontal stabilizer trim actuator (HSTA), and replacement or re-identification if necessary; and revising the maintenance program to include safe life limits and inspection requirements for the HSTA. Since we issued AD 2013-02-08, we determined that not all affected attachment pins and trunnions were included in the required inspections. In addition, for certain airplanes on which the replacement in AD 2013-02-08 was done, incorrect attachment hardware may have been used. This proposed AD would require measuring the diameter of certain bolts and attach holes, and, as applicable, measuring the diameter of the attach holes in the trunnions and pins, doing detailed visual inspections of the trunnions, pins, and spacers, doing corrective actions, and re-identifying trunnions and pins. This proposed AD also requires revising the maintenance or inspection program. This proposed AD also removes certain airplanes from the applicability. We are proposing this AD to prevent failure of the attachment pins and trunnions of the HSTA. This condition could result in separation of the horizontal stabilizer, and consequent loss of control of the airplane.

## Notices in this docket

- Jul 15, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-16733, comments due Aug 29, 2016 (https://www.federalregister.gov/documents/2016/07/15/2016-16733/airworthiness-directives-bombardier-inc-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.