# Proposed AD 2003-NM-149-AD: Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-14-16
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 17, 2004, 69 FR 12587
- Comments due: April 17, 2004
- Became: [AD 2004-14-16](https://openairdocs.org/ad/2004-14-16)
- Docket: 2003-NM-149-AD
- FR document: 04-5947
- Official PDF: https://openairdocs.org/files/sha256/b0/29/b0296a1b90d29f0d918faba109c7db885ce4ddcd59502feb0bbb23ebacab223e (from https://www.govinfo.gov/content/pkg/FR-2004-03-17/pdf/04-5947.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/03/17/04-5947/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F459D3C9E228875786256E5A005523DD.0001
- Page: https://openairdocs.org/proposed/2003-NM-149-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposal would require repetitive detailed and eddy current inspections on the main fittings of the main landing gears (MLG) to detect discrepancies, and related investigative/corrective actions if necessary. This proposal also would require servicing the shock strut of the MLGs; inspecting the shock strut of the MLGs for nitrogen pressure, visible chrome dimension, and oil leakage; and servicing any discrepant strut. This action is necessary to detect and correct premature cracking of the main fittings of the MLGs, which could result in failure of the fittings and consequent collapse of the MLGs during landing. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Mar 17, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-5947, comments due Apr 17, 2004 (https://www.federalregister.gov/documents/2004/03/17/04-5947/airworthiness-directives-bombardier-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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