
[Federal Register Volume 79, Number 180 (Wednesday, September 17, 2014)]
[Proposed Rules]
[Pages 55673-55675]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-22151]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2014-0625; Directorate Identifier 2014-NM-044-AD]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain Bombardier, Inc. Model CL-600-2A12 (CL-601), and CL-600-2B16 
(CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. This proposed AD 
was prompted by a report of an aft equipment bay fire due to chafing 
and subsequent arcing of the integrated drive generator (IDG) power 
cables. Additionally, we have received several reports of broken 
support brackets of the hydraulic lines. This proposed AD would require 
a one-time inspection of the IDG power cables for chafing, and for any 
cracked or broken support bracket of the hydraulic line; and corrective 
actions if necessary. We are proposing this AD to detect and correct 
broken support brackets of the hydraulic lines, which could result in 
inadequate clearance between the IDG power cables and hydraulic lines 
and chafing of the IDG power cables, and consequent high energy arcing 
and an uncontrolled fire in the aft equipment bay.

DATES: We must receive comments on this proposed AD by November 3, 
2014.

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 W12-140, 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 proposed AD, contact 
Bombardier, Inc., 400 C[ocirc]te Vertu Road West, Dorval, Qu[eacute]bec 
H4S 1Y9, Canada; telephone 514-855-5000; fax 514 855-7401; email 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You 
may view this referenced service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information 
on the availability of this material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2014-
0625; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this proposed 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: Assata Dessaline, Aerospace Engineer,

[[Page 55674]]

Avionics and Service Branch, ANE-172, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7301; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2014-0625; 
Directorate Identifier 2014-NM-044-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2014-05, dated January 20, 2014 (referred to after this as the 
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    There has been one reported case on the CL-600-2B19 aeroplane of 
an aft equipment bay fire occurring due to arcing of chafed 
integrated drive generator (IDG) power cables. Additionally, the 
hydraulic line support brackets located at the fuselage station (FS) 
672 and FS 682 on a CL-600-2B19 aeroplane could result in inadequate 
clearance between the IDG power cables and hydraulic lines, 
potentially resulting in chafing of the IDG power cables. Chafed IDG 
power cables can generate high energy arcing, which can result in an 
uncontrolled fire in the aft equipment bay.
    It was found that a similar configuration exists on models CL-
600-2A12 and CL-600-2B16 aeroplanes. Therefore, a similar unsafe 
condition exists.
    This [Canadian] AD mandates the detailed visual inspection and, 
if required, rectification of the IDG power cables and hydraulic 
line support bracket.

    Required corrective actions include repair or replacement of the 
IDG power cable if any chafing is found, and replacement of any cracked 
or broken support bracket. You may examine the MCAI in the AD docket on 
the Internet at http://www.regulations.gov by searching for and 
locating it in Docket No. FAA-2014-0625.

Relevant Service Information

    Bombardier has issued the following service information:
    (1) Bombardier Service Bulletin 605-24-007, Revision 01, dated 
January 13, 2014 (for Model CL-600-2B16 airplanes);
    (2) Bombardier Service Bulletin 604-24-026, Revision 01, dated 
January 13, 2014 (for Model CL-600-2B16 airplanes); and
    (3) Bombardier Service Bulletin 604-0625, Revision 01, dated 
January 13, 2014 (for Model Cl-600-2A12 and CL-600-2B16 airplanes).
    The actions described in this service information are intended to 
correct the unsafe condition identified in the MCAI.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

Costs of Compliance

    We estimate that this proposed AD affects 95 airplanes of U.S. 
registry.
    We also estimate that it would take about 1 work-hour per product 
to comply with the basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Based on these figures, we estimate 
the cost of this proposed AD on U.S. operators to be $8,075, or $85 per 
product.
    We have received no definitive data that would enable us to provide 
cost estimates for the on-condition repair of chafed power cables or 
cracked or broken support brackets, as specified in this AD.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska; and
    4. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. Amend Sec.  39.13 by adding the following new airworthiness 
directive (AD):

Bombardier, Inc.: Docket No. FAA-2014-0625; Directorate Identifier 
2014-NM-044-AD.

(a) Comments Due Date

    We must receive comments by November 3, 2014.

[[Page 55675]]

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc. airplanes identified in 
paragraphs (c)(1), (c)(2), and (c)(3) of this AD, certificated in 
any category.
    (1) Model CL-600-2A12 (CL-601) airplanes, serial numbers 3001 
through 3066 inclusive.
    (2) Model CL-600-2B16 (CL-601-3A, CL-601-3R Variants) airplanes, 
serial numbers 5001 through 5194 inclusive.
    (3) Model CL-600-2B16 (CL-604 Variant) airplanes, serial numbers 
5301 through 5665 inclusive, and 5701 through 5934 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 24, Electrical 
Power.

(e) Reason

    This AD was prompted by a report of an aft equipment bay fire 
due to chafing and subsequent arcing of the integrated drive 
generator (IDG) power cables. Additionally, we have received several 
reports of broken support brackets of the hydraulic lines. We are 
issuing this AD to detect and correct broken support brackets of the 
hydraulic lines, which could result in inadequate clearance between 
the IDG power cables and hydraulic lines and chafing of the IDG 
power cables, and consequent high energy arcing and an uncontrolled 
fire in the aft equipment bay.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) One-Time Inspection and Corrective Actions

    Within 400 flight hours or 18 months after the effective date of 
this AD, whichever occurs first: Perform a one-time detailed 
inspection of the IDG power cables for chafing between the cables 
and the adjacent hydraulic and pneumatic lines, and for any cracked 
or broken support bracket of the hydraulic lines, in accordance with 
the Accomplishment Instructions of the applicable service 
information identified in paragraphs (g)(1), (g)(2), and (g)(3) of 
this AD. If any chafing of the power cables or any cracked or broken 
support bracket is found, before further flight, repair or replace, 
as applicable, in accordance with the Accomplishment Instructions of 
the applicable service information identified in paragraphs (g)(1), 
(g)(2), and (g)(3) of this AD.
    (1) Bombardier Service Bulletin 605-24-007, Revision 01, dated 
January 13, 2014 (for Model CL-600-2B16 airplanes).
    (2) Bombardier Service Bulletin 604-24-026, Revision 01, dated 
January 13, 2014 (for Model CL-600-2B16 airplanes).
    (3) Bombardier Service Bulletin 601-0625, Revision 01, dated 
January 13, 2014 (for Model Cl-600-2A12 and CL-600-2B16 airplanes).

(h) Credit for Previous Actions

    This paragraph provides credit for action required by paragraph 
(g) of this AD, if the action was performed before the effective 
date of this AD using Bombardier Service Bulletin 605-24-007, 604-
24-026, or 601-0625, all dated September 18, 2012, provided that the 
action specified in Service Request for Product Support Action 
(SRPSA) 27512, SRPSA 30806, SRPSA 32727, SRPSA 32864, or SRPSA 33161 
has not been done. Bombardier Service Bulletins 605-24-007, 604-24-
026, and 601-0625, all dated September 18, 2012, are not 
incorporated by reference in this AD.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office (ACO), ANE-170, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, 
send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the ACO, send it to ATTN: Program Manager, Continuing 
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 
410, Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 
Before using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
local flight standards district office/certificate holding district 
office. The AMOC approval letter must specifically reference this 
AD.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain corrective actions from a manufacturer, the action must be 
accomplished using a method approved by the Manager, International 
Branch, ANM-116, Transport Airplane Directorate, FAA; or Transport 
Canada Civil Aviation (TCCA), or Bombardier, Inc.'s TCCA Design 
Approval Organization (DAO). If approved by the DAO, the approval 
must include the DAO-authorized signature.

(j) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2014-05, dated January 
20, 2014, for related information. This MCAI may be found in the AD 
docket on the Internet at http://www.regulations.gov by searching 
for and locating it in Docket No. FAA-2014-0625.
    (2) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; email thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You may view this service information at the 
FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
WA. For information on the availability of this material at the FAA, 
call 425-227-1221.

    Issued in Renton, Washington, on September 9, 2014.
Jeffrey E. Duven,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2014-22151 Filed 9-16-14; 8:45 am]
BILLING CODE 4910-13-P


