# Proposed AD FAA-2010-0223: Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440), CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-23-14
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 15, 2010, 75 FR 12152
- Comments due: April 29, 2010
- Became: [AD 2010-23-14](https://openairdocs.org/ad/2010-23-14)
- Docket: FAA-2010-0223 (https://www.regulations.gov/docket/FAA-2010-0223, where comments are filed)
- Project: 2009-NM-105-AD
- FR document: 2010-5515
- Official PDF: https://openairdocs.org/files/sha256/96/8d/968d8aaff696d1dc5e6b1440baf5b205a5827a680e44a506d87eaba3feca0a7c (from https://www.govinfo.gov/content/pkg/FR-2010-03-15/pdf/2010-5515.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/03/15/2010-5515/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/795A8179D4969721862576E70052036A.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0223

## 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:

Several cases of corrosion in lower structural members of the passenger door have been reported. It was subsequently determined that a drainage ramp (constructed from resin) had deteriorated with time and was retaining moisture. * * * Corrosion left undetected could eventually affect the structural integrity of the door and surrounding structure.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Mar 15, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-5515, comments due Apr 29, 2010 (https://www.federalregister.gov/documents/2010/03/15/2010-5515/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440)

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