# Proposed AD FAA-2008-0888: Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-06-04
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 19, 2008, 73 FR 48312
- Comments due: September 18, 2008
- Became: [AD 2009-06-04](https://openairdocs.org/ad/2009-06-04)
- Docket: FAA-2008-0888 (https://www.regulations.gov/docket/FAA-2008-0888, where comments are filed)
- Project: 2008-NM-084-AD
- FR document: E8-19167
- Official PDF: https://openairdocs.org/files/sha256/58/6e/586ee38d7333c73d5ac80fd26bf22220d86bc48e12609e83ffea45491a90c5a3 (from https://www.govinfo.gov/content/pkg/FR-2008-08-19/pdf/E8-19167.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/08/19/E8-19167/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F197C15C5267703F862574AA0058F885.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0888

## 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:

Bombardier Aerospace has completed a system safety review of the CL-600-2B19 aircraft fuel system against new fuel tank safety standards, * * *. This assessment showed that there is insufficient electrical bonding for lightning protection at certain locations inside the fuel tanks. In addition, the assessment also revealed that existing bonding jumpers across self-bonded couplings are not required. Insufficient electrical bonding, if not corrected, could result in arcing and potential ignition source inside the fuel tank during lightning strikes and consequent 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

- Aug 19, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-19167, comments due Sep 18, 2008 (https://www.federalregister.gov/documents/2008/08/19/E8-19167/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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