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PROPOSED AD BOMBARDIER, INC.:
Docket No. FAA-2019-0019; Product Identifier 2018-NM-130-AD.

(a) COMMENTS DUE DATE

    We must receive comments by April 8, 2019.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11
    airplanes, certificated in any  category, serial numbers 9002  through
    9831 inclusive, and 9998.

(d) SUBJECT

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

(e) REASON

    This AD was prompted by reports of low clearance between the  variable
    frequency generator (VFG) power  feeder cables and adjacent  hydraulic
    lines and/or fuel  lines in the  aft equipment bay,  which could cause
    chafing  damage.  We  are  issuing  this  AD  to  address  this unsafe
    condition, which could result in a hydraulic/fuel leak and  electrical
    arcing as an ignition source, and could cause an in- flight fire.

(f) COMPLIANCE

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

(g) ROUTING MODIFICATION

    Within  24 months  after the  effective date  of this  AD: Modify  the
    routing  of the  VFG power  feeder  cables  and harnesses  in the  aft
    equipment bay to ensure the required clearance between the cables  and
    the  hydraulic  lines  and/or  fuel  lines,  in  accordance  with  the
    Accomplishment  Instructions  of  the  applicable  service information
    listed in figure 1 to paragraph (g) of this AD.

    ILLUSTRATION

    FIGURE 1 TO PARAGRAPH (G) OF THIS AD
    SERVICE INFORMATION FOR MODIFICATION

(h) CREDIT FOR PREVIOUS ACTIONS

(1) This paragraph provides credit for the  modification required by para-
    graph (g) of this AD for airplanes on which the modification specified
    in Bombardier Service Bulletin 700-24-6014, dated April 25, 2018,  was
    performed  before  the  effective date  of  this  AD using  Bombardier
    Service Request for Product Support Action (SRPSA) 000236314.

(2) This paragraph  provides credit for the modification required by para-
    graph (g)  of this  AD, if  the modification  was performed before the
    effective date of this AD  using the service information specified  in
    paragraphs (h)(2)(i) through (h)(2)(iv) of this AD.

(i) Bombardier Service Bulletin 700-24-089, dated April 25, 2018.

(ii) Bombardier Service Bulletin 700-24-6014, dated April 25, 2018.

(iii) Bombardier Service Bulletin 700-1A11-24-028, dated April 25, 2018.

(iv) Bombardier Service Bulletin 700-24-5014, dated April 25, 2018.

(i) OTHER FAA AD PROVISIONS

    The following provisions also apply to this AD:

(1) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS): The  Manager, New York  ACO
    Branch,  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 manager of the certification office,  send
    it to ATTN: Program  Manager, Continuing Operational Safety,  FAA, New
    York ACO Branch, 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.

(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,  New York  ACO
    Branch, 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) Canad-
    ian AD CF-2018-22, dated August 2, 2018, 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  Docket No.
    FAA-2019-0019.

(2) For more information about this AD, contact  Steven Dzierzynski, Aero-
    space Engineer, Avionics and Electrical Systems Services Section, FAA,
    New York  ACO Branch,  1600 Stewart  Avenue, Suite  410, Westbury,  NY
    11590;  telephone  516-228-7367; fax  516-794-5531;  email 9-avs-nyaco
    -cos@faa.gov.

(3) For service  information identified  in this  AD, contact  Bombardier,
    Inc.,  400  Cote-Vertu  Road West,  Dorval,  Quebec  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  Standards
    Branch, 2200 South 216th St.,  Des Moines, WA. For information  on the
    availability of this material at the FAA, call 206-231-3195.

Issued in Des Moines, Washington,  on February 1, 2019. Michael  Kaszycki,
Acting  Director,  System   Oversight  Division,  Aircraft   Certification
Service.

DATES: We must receive comments on this proposed AD by April 8, 2019.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


14 CFR Part 39

[Docket No. FAA-2019-0019; Product Identifier 2018-NM-130-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
This proposed AD was prompted by reports of low clearance between the
variable frequency generator (VFG) power feeder cables and adjacent
hydraulic lines and/or fuel lines in the aft equipment bay, which could
cause chafing damage. This proposed AD would require modifying the
routing of the VFG power feeder cables and harnesses in the aft
equipment bay. We are proposing this AD to address the unsafe condition
on these products.

DATES: We must receive comments on this proposed AD by April 8, 2019.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, 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: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact Bombardier, Inc.,
400 Cote-Vertu Road West, Dorval, Quebec
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 Standards
Branch, 2200 South 216th St., Des Moines, WA. For information on the
availability of this material at the FAA, call 206-231-3195.

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-2019-
0019; or in person at Docket Operations between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays. The AD docket contains
this NPRM, the regulatory evaluation, any comments received, and other
information. The street address for Docket Operations (phone: 800-647-
5527) is in the ADDRESSES section. Comments will be available in the AD
docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aerospace
Engineer, Avionics and Electrical Systems Services Section, FAA, New
York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7367; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited


We invite you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include "Docket No. FAA-2019-0019;
Product Identifier 2018-NM-130-AD" at the beginning of your comments.
We specifically invite comments on the overall regulatory, economic,
environmental, and energy aspects of this NPRM. We will consider all
comments received by the closing date and may amend this NPRM because
of 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 NPRM.

Discussion

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2018-22, dated August
2, 2018 (referred to after this as the Mandatory Continuing
Airworthiness Information, or "the MCAI"), to correct an unsafe
condition for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-
1A11 airplanes. The MCAI states:

Several aircraft have been discovered with low clearance between
the Variable Frequency Generator (VFG) cables and hydraulic/fuel
lines in the Aft Equipment Bay which may lead to chafing between the
VFG cables and the hydraulic/fuel lines. Chafing may result in
damage that could lead to a hydraulic/fuel leak and electrical
arcing as an ignition source. This condition, if not corrected,
could result in an in-flight fire.

This [Canadian] AD mandates a modification to the routing of the
VFG power feeder cables and harnesses, to ensure the required
clearance between the VFG cables and hydraulic/fuel lines in the Aft
Equipment Bay.

You may examine the MCAI in the AD docket on the internet at
http://www.regulations.gov by searching for and locating Docket No. FAA-2019-0019.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information for
Bombardier, Inc. Model BD-700-1A10 airplanes.

Service Bulletin 700-24-089, Revision 01, dated August 21, 2018.

Service Bulletin 700-24-6014, Revision 01, dated August 21, 2018.

Bombardier has issued the following service information for Bombardier, Inc. Model
BD-700-1A11 airplanes.

Service Bulletin 700-1A11-24-028, Revision 01, dated August 21, 2018.

Service Bulletin 700-24-5014, Revision 01, dated August 21, 2018.

This service information describes procedures for modifying the
routing of the VFG power feeder cables and harnesses in the aft
equipment bay to ensure the required clearance between the cables and
the hydraulic lines and/or fuel lines. These documents are distinct
since they apply to different airplane models and configurations.

This service information is reasonably available because the
interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.

FAA's Determination


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 the relevant information and determined the unsafe
condition described previously is likely to exist or develop on other
products of the same type design.

Proposed Requirements of This NPRM


This proposed AD would require accomplishing the actions specified
in the service information described previously.

Costs of Compliance


We estimate that this proposed AD affects 112 airplanes of U.S.
registry. We estimate the following costs to comply with this proposed AD:

Estimated Costs for Required Actions

LABOR COST
PARTS COST
COST PER PRODUCT
COST ON U.S. OPERATORS
Up to 5 work-hours $85 per hour = Up to $425
Up to $606
Up to $1,031
Up to $115,472.

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.

This proposed AD is issued in accordance with authority delegated
by the Executive Director, Aircraft Certification Service, as
authorized by FAA Order 8000.51C. In accordance with that order,
issuance of ADs is normally a function of the Compliance and
Airworthiness Division, but during this transition period, the
Executive Director has delegated the authority to issue ADs applicable
to transport category airplanes and associated appliances to the
Director of the System Oversight Division.

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


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]


2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):