# Proposed AD FAA-2008-0643: Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-22-03
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 20, 2008, 73 FR 35095
- Comments due: July 21, 2008
- Became: [AD 2008-22-03](https://openairdocs.org/ad/2008-22-03)
- Docket: FAA-2008-0643 (https://www.regulations.gov/docket/FAA-2008-0643, where comments are filed)
- Project: 2008-NM-094-AD
- FR document: E8-13922
- Official PDF: https://openairdocs.org/files/sha256/b4/20/b420f3a7c7671c2f4877bec160e06bd0f7023da24b2e34d75358627aa4dad41e (from https://www.govinfo.gov/content/pkg/FR-2008-06-20/pdf/E8-13922.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/06/20/E8-13922/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22DC0CD5AC68C5358625746E00437311.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0643

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. 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:

Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards * * *. [A]ssessment showed that supplemental maintenance tasks [for certain bonding jumpers, wiring harnesses, and hydraulic systems, among other items] are required to prevent potential ignition sources inside the fuel system, which could result in a fuel tank explosion. * * *

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

## Notices in this docket

- Jun 20, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-13922, comments due Jul 21, 2008 (https://www.federalregister.gov/documents/2008/06/20/E8-13922/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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