Tdata AD

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2012-12-17	BOMBARDIER, INC.: Amendment 39-17097. Docket No. FAA-2011-1089; Directorate Identifier 2011-NM-110-AD.

(a) EFFECTIVE DATE

    This airworthiness directive (AD) becomes effective July 30, 2012.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Bombardier, Inc. Model BD-100-1A10 (Challenger 300)
    airplanes, certificated in any  category, serial numbers (S/N)s  20003
    and subsequent.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 35: Oxygen.

(e) REASON

    This AD was prompted  by reports of deformation  found at the neck  of
    the  pressure  regulator body  on  the oxygen  cylinder  and regulator
    assembly (CRA). We  are issuing this  AD to prevent  elongation of the
    pressure regulator neck, which could  result in rupture of the  oxygen
    cylinder, and in the case of cabin depressurization, oxygen not  being
    available when required.

(f) COMPLIANCE

    You  are  responsible  for  having the  actions  required  by  this AD
    performed within  the compliance  times specified,  unless the actions
    have already been done.

(g) ACTIONS

    For airplanes having  S/Ns 20003 through  20291 inclusive: Within  750
    flight hours, or within 6 months after the effective date of this  AD,
    whichever occurs first, inspect oxygen pressure regulators having part
    number (P/N) 806370-06 or  806370-14, to determine the  serial number,
    in   accordance   with  paragraph   2.B.(2)   of  the   Accomplishment
    Instructions of  Bombardier Service  Bulletin 100-35-05,  Revision 02,
    dated January 31, 2011.

(1) If  the  serial  number  of the oxygen pressure regulator is listed in
    table  2  of  the Accomplishment  Instructions  of  Bombardier Service
    Bulletin 100-35-05, Revision 02,  dated January 31, 2011,  replace the
    affected  oxygen  CRA,  in  accordance  with  paragraph  2.C.  of  the
    Accomplishment Instructions of Bombardier Service Bulletin  100-35-05,
    Revision 02, dated January 31, 2011.

(2) If the serial number of the oxygen pressure regulator is not listed in
    table  2  of  the Accomplishment  Instructions  of  Bombardier Service
    Bulletin 100-35-05, Revision  02, dated January  31, 2011, no  further
    action is required by this paragraph.

(h) PARTS INSTALLATION

    For all airplanes: As of the effective date of this AD, no person  may
    install  an  oxygen  pressure regulator  (P/N 806370-06  or 806370-14)
    having  any serial  number listed  in  table  2 of  the Accomplishment
    Instructions of  Bombardier Service  Bulletin 100-35-05,  Revision 02,
    dated  January 31,  2011, on  any airplane,  unless a  suffix "-A"  is
    beside the serial number.

(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,  New  York 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) Airworthy Product: For any requirement in this AD to obtain corrective
    actions from a manufacturer or other source, use these actions if they
    are FAA-approved.  Corrective actions  are considered  FAA-approved if
    they are approved by the State of Design Authority (or their delegated
    agent). You are required to assure the product is airworthy before  it
    is returned to service.

(j) RELATED INFORMATION

    Refer to MCAI Canadian  Airworthiness Directive CF-2011-09, dated  May
    13, 2011;  and  Bombardier  Service  Bulletin 100-35-05,  Revision 02,
    dated January 31, 2011; for related information.

(k) MATERIAL INCORPORATED BY REFERENCE

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

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

(i) Bombardier Service Bulletin 100-35-05, Revision 02,  dated January 31,
    2011.

(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.

(4) You may review copies of the service information at the FAA, Transport
    Airplane Directorate,  1601 Lind  Avenue SW.,  Renton, Washington. For
    information on the availability of this material at the FAA, call  425
    -227-1221.

(5) You  may  also  review  copies  of  the  service  information  that is
    incorporated  by  reference  at  the  National  Archives  and  Records
    Administration (NARA).  For information  on the  availability of  this
    material  at   an  NARA   facility,  call   202-741-6030,  or   go  to
    http://www.archives.gov/federal_register/code_of_federal_regulations/i
    br_locations.html.

Issued in Renton, Washington, on June 11, 2012. Kalene C. Yanamura, Acting
Manager, Transport Airplane Directorate, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, Airframe
and  Mechanical   Systems  Branch,   ANE-171,  FAA,   New  York   Aircraft
Certification Office, 1600 Stewart  Avenue, Suite 410, Westbury,  New York
11590; telephone (516) 228-7318; fax (516) 794-5531.

PREAMBLE

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 BD-100-1A10 (Challenger 300) airplanes. This AD
was prompted by reports of deformation found at the neck of the
pressure regulator body on the oxygen cylinder and regulator assembly
(CRA). This AD requires an inspection to determine if a certain oxygen
CRA is installed and the replacement of affected oxygen CRAs. We are
issuing this AD to prevent elongation of the pressure regulator neck,
which could result in rupture of the oxygen cylinder, and, in the case
of cabin depressurization, oxygen not being available when required.

DATES: This AD becomes effective July 30, 2012.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of July 30,
2012.

ADDRESSES: You may examine the AD docket on the Internet at http://
www.regulations.gov or in person at the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New
York 11590; telephone (516) 228-7318; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a supplemental notice of proposed rulemaking (SNPRM) to
amend 14 CFR part 39 to include an AD that would apply to the specified
products. That SNPRM was published in the Federal Register on February
8, 2012 (77 FR 6525). The original NPRM (76 FR 64857, October 19, 2011)
proposed to require an inspection to determine if a certain oxygen
cylinder and regulator assembly (CRA) is installed and the replacement
of affected oxygen CRAs. The SNPRM proposed to change the compliance
time in paragraph (g) of the SNPRM.
You may obtain further information by examining the MCAI in the AD
docket.

Comments

We gave the public the opportunity to participate in developing
this AD. We received no comments on the SNPRM (77 FR 6525, February 8,
2012), or on the determination of the cost to the public.

Conclusion

We reviewed the available data and determined that air safety and
the public interest require adopting the AD as proposed.

Costs of Compliance

We estimate that this AD will affect 79 products of U.S. registry.
We also estimate that it will take about 3 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.
Where the service information lists required parts costs that are
covered under warranty, we have assumed that there will be no charge
for these parts. As we do not control warranty coverage for affected
parties, some parties may incur costs higher than estimated here. Based
on these figures, we estimate the cost of this AD to the U.S. operators
to be $29,145, or $255 per product.

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.
We prepared a regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket.

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 the SNPRM (77 FR 6525, February 8,
2012), 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.

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 AD: