DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-5819; Directorate Identifier 2015-NM-166-AD;
Amendment 39-18336; AD 2015-24-04]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Airplanes

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

ACTION: Final rule; request for comments.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440)
airplanes, CL-600-2C10 (Regional Jet Series 700, 701 & 702) airplanes,
CL-600-2D15 (Regional Jet Series 705) airplanes, CL-600-2D24 (Regional
Jet Series 900) airplanes, and CL-600-2E25 (Regional Jet Series 1000)
airplanes. This AD requires repetitive detailed inspections of the cage
assembly, window louver panel assemblies (WLPAs), and blowout panels
(BOPs), and corrective action if necessary. This AD was prompted by
reports of several cases of damaged or detached decompression WLPAs and BOPs.
We are issuing this AD to detect and correct damaged and detached WLPAs and
BOPs. A detached WLPA or BOP could delay smoke detection in the cargo
compartment, and in the event of a cargo compartment fire, this could
lead to an uncontrolled cargo compartment fire.

DATES: This AD becomes effective December 15, 2015.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of December 15,
2015.
We must receive comments on this AD by January 14, 2016.

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: 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 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. It
is also available on the Internet at http://www.regulations.gov by
searching for and locating Docket No. FAA-2015-5819.

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-2015-
5819; 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: Aziz Ahmed, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury,
NY 11590; telephone 516-228-7329; fax 516-794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2015-28, dated October 21, 2015 (referred to after this as the
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to
correct an unsafe condition for certain Bombardier, Inc Model CL-600-
2B19 (Regional Jet Series 100 & 440) airplanes, CL-600-2C10 (Regional
Jet Series 700, 701 & 702) airplanes, CL-600-2D15 (Regional Jet Series
705) airplanes, CL-600-2D24 (Regional Jet Series 900) airplanes, and
CL-600-2E25 (Regional Jet Series 1000) airplanes. The MCAI states:

Several cases of damaged decompression window louver panel
assemblies (WLPAs) have been reported in-service. Subsequent review
of in-service data also showed multiple reports of detached blowout
panels (BOPs). Damaged or detached WLPAs or BOPs create openings in
the cargo compartment.
The presence of unintended openings on the WLPAs and BOPs could
delay smoke detection in the cargo compartment. In addition, the
cargo compartment may not be able to maintain Halon concentration
required for fire suppression. In the event of a cargo compartment
fire, this condition could lead to an uncontrolled cargo compartment
fire.
This [Canadian] AD mandates the repetitive inspection of the
affected WLPAs and BOPs.

Required actions include repetitive detailed inspections for
damaged and detached WLPAs and BOPs. Corrective actions include repair.
You may examine the MCAI on the Internet at http://www.regulations.gov
by searching for and locating Docket No. FAA-2015-5819.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information:
Bombardier Service Bulletin 601R-25-201, dated July 21,
2015.
Bombardier Service Bulletin 670BA-25-100, dated July 21,
2015.
The service information describes procedures for repetitive
detailed inspections for damage of the cage assembly, WLPAs, and BOPs,
and repair and replacement of damaged parts. 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 of this AD.

FAA's Determination and Requirements of This 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 issuing this AD because we
evaluated all pertinent information and determined the unsafe condition
exists and is likely to exist or develop on other products of these
same type designs.

FAA's Determination of the Effective Date

An unsafe condition exists that requires the immediate adoption of
this AD. The FAA has found that the risk to the flying public justifies
waiving notice and comment prior to adoption of this rule because a
detached WLPA or BOP could delay smoke detection in the cargo
compartment, and in the event of a cargo compartment fire, this could
lead to an uncontrolled cargo compartment fire. Therefore, we
determined that notice and opportunity for public comment before
issuing this AD are impracticable and that good cause exists for making
this amendment effective in fewer than 30 days.

Comments Invited

This AD is a final rule that involves requirements affecting flight
safety, and we did not precede it by notice and opportunity for public
comment. We invite you to send any written relevant data, views, or
arguments about this AD. Send your comments to an address listed under
the ADDRESSES section. Include ``Docket No. FAA-2015-5819; Directorate
Identifier 2015-NM-166-AD'' at the beginning of your comments. We
specifically invite comments on the overall regulatory, economic,
environmental, and energy aspects of this AD. We will consider all
comments received by the closing date and may amend this 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 AD.

Costs of Compliance

We estimate that this AD affects 986 airplanes of U.S. registry.
We also estimate that it will take about 2 work-hours per product
to comply with the basic requirements of this AD. The average labor
rate is $85 per work-hour. Required parts will cost about $0 per
product. Based on these figures, we estimate the cost of this AD on
U.S. operators to be $167,620, or $170 per product.
We have received no definitive data that would enable us to provide
cost estimates for the on-condition actions 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 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):