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2018-20-18 BOMBARDIER, INC.: Amendment 39-19452; Docket No. FAA-2018-0449; Product Identifier 2018-NM-042-AD.
(a) EFFECTIVE DATE

    This AD is effective November 20, 2018.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies to Bombardier, Inc.,  Model DHC-8-400, -401, and -402
    airplanes, certificated in any category,  serial numbers 4001 and sub-
    sequent.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 27, Flight controls.

(e) REASON

    This AD  was prompted  by a  report of  uncommanded deployment  of the
    ground spoilers when the power levers were advanced for takeoff, which
    was  caused by  faulty switches  in the  power lever  module.  We  are
    issuing this AD to address faulty switches in the power lever  module,
    which could result  in uncommanded deployment  of the ground  spoilers
    and a possible runway excursion.

(f) COMPLIANCE

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

(g) REVISION OF MAINTENANCE OR INSPECTION PROGRAM

    Within  30  days after  the  effective date  of  this AD:  Revise  the
    maintenance or inspection program,  as applicable, to incorporate  the
    information specified in Certification Maintenance Requirements  (CMR)
    Task 276000-110  of Q400  Dash 8  (Bombardier) Temporary  Revision ALI
    -0173, dated March 14, 2017.

(h) INITIAL COMPLIANCE TIME

    The  initial  compliance  time  for  doing  the  CMR  Task  276000-110
    specified in  paragraph (g)  of this  AD is  within 8,000 flight hours
    after the effective date of this AD.

(i) NO ALTERNATIVE ACTIONS OR INTERVALS

    After  the  maintenance  or inspection  program  has  been revised  as
    required by paragraph  (g) of this  AD, no alternative  actions (e.g.,
    inspections) or intervals may be used unless the actions or  intervals
    are  approved  as  an  alternative  method  of  compliance  (AMOC)  in
    accordance with the procedures  specified in paragraph (j)(1)  of this
    AD.

(j) 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.

(k) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian Airworthiness Directive CF-2017-35,  dated November 29, 2017,
    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-2018-0449.

(2) For more information about this AD, contact John P. DeLuca,  Aerospace
    Engineer, Avionics and Administrative Services Section,  FAA, New York
    ACO Branch,  1600 Stewart Avenue, Suite 410, Westbury, NY 11590; tele-
    phone 516-228-7369; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

(l) MATERIAL INCORPORATED BY REFERENCE

(1) The Director of the Federal Register  approved  the  incorporation  by
    reference (IBR) of  the service information  listed in this  paragraph
    under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use  this service information as applicable to do the actions
    required by this AD, unless this AD specifies otherwise.

(i) Q400 Dash 8 (Bombardier) Temporary Revision ALI-0173,  dated March 14,
    2017.

(ii) Reserved.

(3) For  service information identified  in this AD,  contact  Bombardier,
    Inc.,  Q-Series Technical Help Desk,  123 Garratt Boulevard,  Toronto,
    Ontario M3K 1Y5, Canada;  telephone 416-375-4000; fax 416-375-4539; e-
    mail thd.qseries@aero.bombardier.com;  internet http://www.bombardier.
    com.

(4) 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.

(5) You  may  view  this  service  information  that  is  incorporated  by
    reference at the National Archives and Records Administration  (NARA).
    For information on the availability of this material at NARA, call 202
    -741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-
    locations.html.

Issued in Des Moines, Washington, on September 20, 2018.  John P. Piccola,
Acting  Director,  System   Oversight  Division,  Aircraft   Certification
Service.

FOR  FURTHER  INFORMATION  CONTACT:  John P. DeLuca,  Aerospace  Engineer,
Avionics and Administrative Services Section,  FAA,  New York  ACO Branch,
1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7369
fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0449; Product Identifier 2018-NM-042-AD; Amendment
39-19452; AD 2018-20-18]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

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

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Bombardier, Inc., Model DHC-8-400 series airplanes. This AD was
prompted by a report of uncommanded deployment of the ground spoilers
when the power levers were advanced for takeoff, which was caused by
faulty switches in the power lever module. This AD requires revising
the maintenance or inspection program, as applicable. We are issuing
this AD to address the unsafe condition on these products.

DATES: This AD is effective November 20, 2018.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of November 20,
2018.

ADDRESSES: For service information identified in this final rule,
contact Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt
Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000;
fax 416-375-4539; email thd.qseries@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. It is also available on the internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2018-0449.

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-2018-
0449; 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 final rule, the regulatory evaluation, any comments received, and
other information. The address for Docket Operations (phone: 800-647-
5527) is U.S. Department of Transportation, Docket Operations, M-30,
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: John P. DeLuca, Aerospace Engineer,
Avionics and Administrative Services Section, FAA, New York ACO Branch,
1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-
7369; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain Bombardier, Inc.,
Model DHC-8-400 series airplanes. The NPRM published in the Federal
Register on May 25, 2108 (83 FR 24248). The NPRM was prompted by a
report of uncommanded deployment of the ground spoilers when the power
levers were advanced for takeoff, which was caused by faulty switches
in the power lever module. The NPRM proposed to require revising the
maintenance or inspection program, as applicable.
We are issuing this AD to address faulty switches in the power
lever module, which could result in uncommanded deployment of the
ground spoilers and a possible runway excursion.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD
CF-2017-35, dated November 29, 2017 (referred to after this as the
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to
correct an unsafe condition for certain Bombardier, Inc., Model DHC-8-
400 series airplanes. The MCAI states:

There has been an incident of uncommanded deployment of the
ground spoilers when the power levers were advanced for take-off.
The warning horn sounded and the pilot rejected the take-off. The
subsequent investigation determined the root cause of the spoiler
deployment was faulty switches in the power lever module. An
uncommanded deployment of the ground spoilers may lead to a runway
excursion.
This [Canadian] AD mandates the incorporation of a new
Certification Maintenance Requirement (CMR) task to check the ground
spoiler switches in the power lever module.

Required actions include revising the maintenance or inspection
program, as applicable. 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-2018-0449.

Comments

We gave the public the opportunity to participate in developing
this final rule. The following presents the comment received on the
NPRM and the FAA's response.

Request To Revise Requirements Related to Temporary Revision (TR)

Horizon Air requested that paragraph (g) of the proposed AD be
revised to refer to Bombardier Certification Maintenance Requirements
(CMR) Task 276000-110 of Q400 Dash 8 (Bombardier) TR ALI-0185, dated
March 19, 2018. Horizon Air noted that TR ALI-0185, replaced TR ALI-
0173, dated March 14, 2017, which was specified in the proposed AD.
Horizon Air also requested that we include a statement that, ``When
this temporary revision has been included in general revisions of the
PSM [product support manual], the general revisions may be inserted in
the maintenance or inspection program, as applicable, provided the
relevant information in the general revision is identical to that in
[Q400 Dash 8] (Bombardier) TR ALI-0185 [, dated March 19, 2018].''
We agree to clarify. Paragraph (g) of this AD requires operators to
incorporate ``the information specified in'' CMR Task 276000-110 of
Q400 Dash 8 (Bombardier) TR ALI-0173, dated March 14, 2017. Task 27600-
110 is the same in both TR ALI-0173, dated March 14, 2017; and TR ALI-
0185, dated March 19, 2018. Therefore, if operators incorporate TR ALI-
0185, dated March 19, 2018, into the maintenance or inspection program,
as applicable, they are in compliance with paragraph (g) of this AD
(i.e., since the information specified in TR ALI-0185, dated March 19,
2018, contains the same information as TR ALI-0173, dated March 14,
2017, by incorporating TR ALI-0185, dated March 19, 2018, the operator
is complying with the requirement to incorporate the information
specified in TR ALI-0173, dated March 14, 2017). Similarly, if
operators incorporate the PSM into the maintenance or inspection
program, as applicable, they are in compliance with paragraph (g) of
this AD. We have not changed this AD in this regard.

Conclusion

We reviewed the relevant data, considered the comment received, and
determined that air safety and the public interest require adopting
this final rule as proposed, except for minor editorial changes. We
have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

Bombardier has issued Q400 Dash 8 (Bombardier) Temporary Revision
ALI-0173, dated March 14, 2017. This service information describes CMR
Task 276000-110, ``Operational Check of the Ground Spoiler Switches in
the Power Lever Module.'' 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.

Costs of Compliance

We estimate that this AD affects 86 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:
We have determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although we
recognize that this number may vary from operator to operator. In the
past, we have estimated that this action takes 1 work-hour per
airplane. Since operators incorporate maintenance or inspection program
changes for their affected fleet(s), we have determined that a per-
operator estimate is more accurate than a per-airplane estimate.
Therefore, we estimate the total cost per operator to be $7,650 (90
work-hours x $85 per work-hour).

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 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

This AD will not have federalism implications under Executive Order
13132. This AD will 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 that this AD:
(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.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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):