AD 2008-09-12 R1

AD Final Rules - 2008-09-12 R1.pdf
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AD Number:
2008-09-12 R1
Document Type:
AD Final Rules
Docket Number:
FAA-2009-1196
Subject Heading:
Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
Subject:
Fuel
Status:
Current
Citation:
Federal Register: December 23, 2009
Citation Publish Date:
12/23/2009
Effective Date:
01/07/2010
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Superseded AD:
2008-09-12
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: December 23, 2009 (Volume 74, Number 245)]


[Rules and Regulations]


[Page 68132-68135]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr23de09-2]


––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2009-1196; Directorate Identifier 2009-NM-170-AD; Amendment 39-16146;


AD 2008-09-12 R1]


RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 &


440) Airplanes


AGENCY:
 
Federal Aviation Administration (FAA), Department of Transportation (DOT).


ACTION:
 
Final rule; request for comments.


––––––––––––––––––––––––––––––––––


SUMMARY:
 
We are adopting a new airworthiness directive (AD) for the products listed above that


would revise an existing AD. This 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 aircraft fuel system


against 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 then assessed using Transport Canada Policy Letter No. 525-001, to


determine if mandatory corrective action is required.


The assessment showed that it is necessary to introduce Critical Design Configuration


Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition


source prevention features during configuration changes such as modifications and


repairs, or during maintenance actions. Failure to preserve critical fuel tank system


ignition source prevention features could result in a fuel tank explosion. * * *


This AD requires actions that are intended to address the unsafe condition described in the MCAI.


DATES:
 
This AD becomes effective January 7, 2010.


On June 6, 2008 (73 FR 24147, May 2, 2008), the Director of the Federal Register approved the


incorporation by reference of a certain publication listed in the AD.


We must receive comments on this AD by February 8, 2010.
2


ADDRESSES:
 
You may send comments by any of the following methods:


•
 
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for


submitting comments.


•
 
Fax: (202) 493-2251.


•
 
Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground


Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.


•
 
Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building


Ground Floor, Room W12-40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and


5 p.m., Monday through Friday, except Federal holidays.


For service information identified in this AD, contact Bombardier, Inc., 400 Côte Vertu Road


West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; e-mail


thd.crj@aero.bombardier.com; Internet http://www.bombardier.com.


Examining the AD Docket


You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at


the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal


holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and


other information. The street address for the Docket Operations office (telephone (800) 647-5527) is


in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.


FOR FURTHER INFORMATION CONTACT:
 
James Delisio, Aerospace Engineer, Airframe and


Propulsion Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue,


Suite 410, Westbury, New York 11590; telephone (516) 228-7321; fax (516) 794-5531.


SUPPLEMENTARY INFORMATION:


Discussion


On April 18, 2008, we issued AD 2008-09-12, Amendment 39-15493 (73 FR 24147, May 2,


2008). That AD applied to all Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. That


AD required revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued


Airworthiness to include the critical design configuration control limitations (CDCCL) data.


CDCCLs are limitation requirements to preserve a critical ignition source prevention feature of


the fuel tank system design that is necessary to prevent the occurrence of an unsafe condition. The


purpose of a CDCCL is to provide instruction to retain the critical ignition source prevention feature


during configuration change that may be caused by alterations, repairs, or maintenance actions. A


CDCCL is not a periodic inspection.


Since we issued that AD, we have determined that it is necessary to clarify the AD's intended


effect on spare and on-airplane fuel tank system components, regarding the use of maintenance


manuals and instructions for continued airworthiness.


Section 91.403(c) of the Federal Aviation Regulations (14 CFR 91.403(c)) specifies the


following:


No person may operate an aircraft for which a manufacturer's maintenance manual or


instructions for continued airworthiness has been issued that contains an airworthiness


limitation section unless the mandatory * * * procedures * * * have been complied with.


Some operators have questioned whether existing components affected by the new CDCCLs must be


reworked. We did not intend for the AD to retroactively require rework of components that had been


maintained using acceptable methods before the effective date of the AD. Owners and operators of


the affected airplanes therefore are not required to rework affected components identified as