# Proposed AD FAA-2010-1039: Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-05-03
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 21, 2010, 75 FR 64960
- Comments due: December 6, 2010
- Became: [AD 2011-05-03](https://openairdocs.org/ad/2011-05-03)
- Docket: FAA-2010-1039 (https://www.regulations.gov/docket/FAA-2010-1039, where comments are filed)
- Project: 2010-NM-002-AD
- FR document: 2010-26550
- Official PDF: https://openairdocs.org/files/sha256/29/7c/297c75dc7afb56ac943cbe6b2914f5b07b24a185ef7ae973f9b07b4d675a4e4f (from https://www.govinfo.gov/content/pkg/FR-2010-10-21/pdf/2010-26550.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/10/21/2010-26550/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9B7A975520BBF148862577C300488A12.0001
- Page: https://openairdocs.org/proposed/FAA-2010-1039

## 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:

There has been numerous reported failures of the Regional Jet engine TCGB [throttle control gearbox] P/Ns: 2100140-003, 2100140- 005 & 2100140-007. Some of these failures have resulted in in-flight engine shutdowns. Post incident investigations revealed that excessive wear within the engine TCGB could alter the rigging position or cause the throttle to jam. With the rigging position altered, movement of the throttle lever towards the idle position can result in throttle moving too close to the fuel shut-off position, which potentially, can cause the engine to flame out. * * * * * The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Oct 21, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-26550, comments due Dec 6, 2010 (https://www.federalregister.gov/documents/2010/10/21/2010-26550/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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