# Proposed AD FAA-2008-0047: Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-08-09
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 24, 2008, 73 FR 4125
- Comments due: February 25, 2008
- Became: [AD 2008-08-09](https://openairdocs.org/ad/2008-08-09)
- Docket: FAA-2008-0047 (https://www.regulations.gov/docket/FAA-2008-0047, where comments are filed)
- Project: 2007-NM-295-AD
- FR document: E8-1167
- Official PDF: https://openairdocs.org/files/sha256/b3/c9/b3c9da0fcc76261be6ea19124c9dd0d565a9b676c8fb22c675ce6b0ae3af7587 (from https://www.govinfo.gov/content/pkg/FR-2008-01-24/pdf/E8-1167.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/01/24/E8-1167/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C77B862FA71E437B862573DA00776988.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0047

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 400) airplanes. The existing AD currently requires revising the airworthiness limitations section of the Instructions for Continued Airworthiness of the maintenance requirements manual (MRM) by incorporating procedures for repetitive functional tests of the pilot input lever of the pitch feel simulator (PFS) units. That AD also requires new repetitive functional tests of the pilot input lever of the PFS unit, and corrective actions if necessary; and after initiating the new tests, requires removal of the existing procedures for the repetitive functional tests from the MRM. This new action would require revised procedures for the functional tests. This proposed AD results from a report that the shear pin located in the input lever of two PFS units failed due to fatigue. We are proposing this AD to prevent undetected failure of the shear pins of both PFS units simultaneously, which could result in loss of pitch feel forces and consequent reduced control of the airplane.

## Notices in this docket

- Jan 24, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-1167, comments due Feb 25, 2008 (https://www.federalregister.gov/documents/2008/01/24/E8-1167/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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