# Proposed AD FAA-2009-0792: Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional Jet Series 705), and Model CL-600-2D24 (Regional Jet Series 900) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-10-21
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 28, 2009, 74 FR 49346
- Comments due: November 12, 2009
- Became: [AD 2010-10-21](https://openairdocs.org/ad/2010-10-21)
- Docket: FAA-2009-0792 (https://www.regulations.gov/docket/FAA-2009-0792, where comments are filed)
- Project: 2009-NM-057-AD
- FR document: E9-23296
- Official PDF: https://openairdocs.org/files/sha256/7f/46/7f46609d4fbf91e228facdd793f3a824bc23d472afda2816cd2c2b801c7fa3a8 (from https://www.govinfo.gov/content/pkg/FR-2009-09-28/pdf/E9-23296.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/09/28/E9-23296/airworthiness-directives-bombardier-model-cl-600-2c10-regional-jet-series-700-701-and-702-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/29FDA400271AA4388625763F00551B5B.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0792

## 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-600-2C10/CL600-2D15/CL-600-2D24 aircraft fuel system against the new fuel tank safety standards, introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non-compliances were assessed using Transport Canada Policy Letter No. 525-001 to determine if mandatory corrective action was required. The assessment showed that certain hydraulic system failure scenarios could lead to a rapid overheat in the hydraulic lines without giving flight crew sufficient time to react before the No. 1 and No. 2 hydraulic system tubing inside the fuel tank reaches the fuel auto ignition temperature. This 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

- Sep 28, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-23296, comments due Nov 12, 2009 (https://www.federalregister.gov/documents/2009/09/28/E9-23296/airworthiness-directives-bombardier-model-cl-600-2c10-regional-jet-series-700-701-and-702-model)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.