AD 2012-21-14
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-600-2B19 (Regional Jet Series 100) | Airworthiness Directives; Bombardier, Inc. Airplanes |
| aircraft | Bombardier Inc. | CL-600-2B19 (Regional Jet Series 440) | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Failure of the main landing gear (MLG) side brace fitting shaft due to corrosion could result in collapse of the main landing gear.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive detailed inspections for corrosion and damage of the MLG side-brace fitting. Replace the side-brace fitting shaft with the re-designed part number 601R10247-3 if necessary. Eventually replace certain side-brace fitting shafts with the re-designed part as terminating action for inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
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Affected Aircraft
Bombardier Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - 2012-21-14.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2012-21-14 Document Type: AD Final Rules Docket Number: FAA-2012-0592 Subject Heading: Airworthiness Directives; Bombardier, Inc. Airplanes Subject: Wings Status: Current Citation: Federal Register Volume 77, Number 211 (Wednesday, October 31, 2012) Citation Publish Date: 10/31/2012 Effective Date: 12/05/2012 Make: Bombardier Inc. Model: CL-600-2B19 (Regional Jet Series 100) | CL-600-2B19 (Regional Jet Series 440) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2004-22-23 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 7 1 [Federal Register Volume 77, Number 211 (Wednesday, October 31, 2012)] [Rules and Regulations] [Pages 65810-65812] From the Federal Register Online via the Government Printing Office [www.gpo.gov] [FR Doc No: 2012-26088] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-0592; Directorate Identifier 2011-NM-253-AD; Amendment 39-17230 AD 2012-21-14] RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. –––––––––––––––––––––––––––––––––– SUMMARY: We are superseding an existing airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. That AD currently requires a one-time inspection of the shafts of the main landing gear (MLG) side-brace fittings to detect corrosion, and the forward and aft bushings in the left-hand and right-hand MLG side-brace fittings to detect discrepancies. The existing AD also requires corrective and related actions if necessary. This new AD requires repetitive detailed inspections for corrosion and damage of the MLG side- brace fitting, and replacing the side-brace fitting shaft with the re-designed side-brace fitting shaft of the MLG if necessary. This AD also requires eventual replacement of certain side-brace fitting shafts with the re-designed part. Replacement with a re-designed side-brace fitting shaft of the MLG is terminating action for the repetitive inspections. This AD was prompted by reports of failure of the side-brace fitting shaft of the main landing gear (MLG) due to corrosion. We are issuing this AD to prevent fractures of the side-brace fitting shafts of the MLG, and possible collapse of the MLG. DATES: This AD becomes effective December 5, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of December 5, 2012. ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC. FOR FURTHER INFORMATION CONTACT: Jeffrey Zimmer, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7306; fax (516) 794- 5531. 2 SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on June 12, 2012 (77 FR 34870), and proposed to supersede AD 2004-22-23, Amendment 39-13851 (69 FR 64856, November 9, 2004). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: Due to the failure of the main landing gear (MLG) side brace fitting shaft, caused by corrosion, [Transport Canada Civil Aviation (TCCA)] Airworthiness Directive (AD) CF-2002-41 was issued to require inspection and if needed, parts replacement. However, the existing MLG side-brace fitting shafts continued to fail. Failure of the MLG side brace fitting shaft could result in the collapse of the main landing gear. This [TCCA] directive mandates the repetitive detailed visual inspection [for cracking and corrosion] of the MLG side brace fitting and the incorporation of the re-designed MLG side brace fitting shaft part number (P/N) 601R10247-3 as the terminating action. You may obtain further information by examining the MCAI in the AD docket. Comments We gave the public the opportunity to participate in developing this AD. We considered the comment received. Request to Reference Revised Service Bulletin Comair, Inc. requested that we allow the use of Bombardier Service Bulletin 601R-57-052, Revision A, dated October 28, 2011, in the AD. Comair, Inc. provided no reasons for the request. We agree to reference the most recent service information. Bombardier, Inc. has issued Service Bulletin 601R-57-052, Revision A, dated October 28, 2011. This service bulletin includes editorial changes, but does not add work for airplanes that have done the actions using Bombardier Service Bulletin 601R-57-052, dated July 28, 2011 (which was referenced to as the appropriate source of service information in the NPRM (77 FR 34870, June 12, 2012). Therefore we have revised paragraphs (g)(1), (g)(2), (h)(1), and (h)(2) of this AD to refer to Bombardier Service Bulletin 601R- 57-052, Revision A, dated October 28, 2011. We have also added paragraph (i) to this AD to allow credit for actions performed before the effective date of this AD using Bombardier Service Bulletin 601R-57-052, dated July 28, 2011. We have re-designated subsequent paragraphs accordingly. Conclusion We reviewed the available data, including the comment received, and determined that air safety and the public interest require adopting the AD with the changes described previously and except for minor editorial changes. We have determined that these changes: • Are consistent with the intent that was proposed in the NPRM (77 FR 34870, June 12, 2012) for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM (77 FR 34870, June 12, 2012).
Document Text
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AD Final Rules - 2012-21-14.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2012-21-14 Document Type: AD Final Rules Docket Number: FAA-2012-0592 Subject Heading: Airworthiness Directives; Bombardier, Inc. Airplanes Subject: Wings Status: Current Citation: Federal Register Volume 77, Number 211 (Wednesday, October 31, 2012) Citation Publish Date: 10/31/2012 Effective Date: 12/05/2012 Make: Bombardier Inc. Model: CL-600-2B19 (Regional Jet Series 100) | CL-600-2B19 (Regional Jet Series 440) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2004-22-23 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 7 1 [Federal Register Volume 77, Number 211 (Wednesday, October 31, 2012)] [Rules and Regulations] [Pages 65810-65812] From the Federal Register Online via the Government Printing Office [www.gpo.gov] [FR Doc No: 2012-26088] –––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-0592; Directorate Identifier 2011-NM-253-AD; Amendment 39-17230 AD 2012-21-14] RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. –––––––––––––––––––––––––––––––––– SUMMARY: We are superseding an existing airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. That AD currently requires a one-time inspection of the shafts of the main landing gear (MLG) side-brace fittings to detect corrosion, and the forward and aft bushings in the left-hand and right-hand MLG side-brace fittings to detect discrepancies. The existing AD also requires corrective and related actions if necessary. This new AD requires repetitive detailed inspections for corrosion and damage of the MLG side- brace fitting, and replacing the side-brace fitting shaft with the re-designed side-brace fitting shaft of the MLG if necessary. This AD also requires eventual replacement of certain side-brace fitting shafts with the re-designed part. Replacement with a re-designed side-brace fitting shaft of the MLG is terminating action for the repetitive inspections. This AD was prompted by reports of failure of the side-brace fitting shaft of the main landing gear (MLG) due to corrosion. We are issuing this AD to prevent fractures of the side-brace fitting shafts of the MLG, and possible collapse of the MLG. DATES: This AD becomes effective December 5, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of December 5, 2012. ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC. FOR FURTHER INFORMATION CONTACT: Jeffrey Zimmer, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7306; fax (516) 794- 5531. 2 SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on June 12, 2012 (77 FR 34870), and proposed to supersede AD 2004-22-23, Amendment 39-13851 (69 FR 64856, November 9, 2004). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: Due to the failure of the main landing gear (MLG) side brace fitting shaft, caused by corrosion, [Transport Canada Civil Aviation (TCCA)] Airworthiness Directive (AD) CF-2002-41 was issued to require inspection and if needed, parts replacement. However, the existing MLG side-brace fitting shafts continued to fail. Failure of the MLG side brace fitting shaft could result in the collapse of the main landing gear. This [TCCA] directive mandates the repetitive detailed visual inspection [for cracking and corrosion] of the MLG side brace fitting and the incorporation of the re-designed MLG side brace fitting shaft part number (P/N) 601R10247-3 as the terminating action. You may obtain further information by examining the MCAI in the AD docket. Comments We gave the public the opportunity to participate in developing this AD. We considered the comment received. Request to Reference Revised Service Bulletin Comair, Inc. requested that we allow the use of Bombardier Service Bulletin 601R-57-052, Revision A, dated October 28, 2011, in the AD. Comair, Inc. provided no reasons for the request. We agree to reference the most recent service information. Bombardier, Inc. has issued Service Bulletin 601R-57-052, Revision A, dated October 28, 2011. This service bulletin includes editorial changes, but does not add work for airplanes that have done the actions using Bombardier Service Bulletin 601R-57-052, dated July 28, 2011 (which was referenced to as the appropriate source of service information in the NPRM (77 FR 34870, June 12, 2012). Therefore we have revised paragraphs (g)(1), (g)(2), (h)(1), and (h)(2) of this AD to refer to Bombardier Service Bulletin 601R- 57-052, Revision A, dated October 28, 2011. We have also added paragraph (i) to this AD to allow credit for actions performed before the effective date of this AD using Bombardier Service Bulletin 601R-57-052, dated July 28, 2011. We have re-designated subsequent paragraphs accordingly. Conclusion We reviewed the available data, including the comment received, and determined that air safety and the public interest require adopting the AD with the changes described previously and except for minor editorial changes. We have determined that these changes: • Are consistent with the intent that was proposed in the NPRM (77 FR 34870, June 12, 2012) for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM (77 FR 34870, June 12, 2012).
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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