# Proposed AD FAA-2007-0185: Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-02-07
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 13, 2007, 72 FR 63834
- Comments due: December 13, 2007
- Became: [AD 2008-02-07](https://openairdocs.org/ad/2008-02-07)
- Docket: FAA-2007-0185 (https://www.regulations.gov/docket/FAA-2007-0185, where comments are filed)
- Project: 2007-NM-246-AD
- FR document: E7-22146
- Official PDF: https://openairdocs.org/files/sha256/bd/08/bd08aa517df52c61c9b5835034d637743473e4289671be70b06e05bf3c361b76 (from https://www.govinfo.gov/content/pkg/FR-2007-11-13/pdf/E7-22146.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/11/13/E7-22146/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/48E7C26524720E87862573920060D134.0001
- Page: https://openairdocs.org/proposed/FAA-2007-0185

## 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 * * *. The assessment showed that if the fuel boost pump reducer coupling is anodized, insufficient electrical bonding between the boost pump canister and the pressure pick-up line could occur. Insufficient electrical bonding between the boost pump canister and the pressure pick-up line, 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

- Nov 13, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-22146, comments due Dec 13, 2007 (https://www.federalregister.gov/documents/2007/11/13/E7-22146/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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