81 FR 21491 - Airworthiness Directives; Bombardier, Inc. Airplanes

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 81, Issue 70 (April 12, 2016)

Page Range		21491-21493
FR Document		2016-08270

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 a design review, which found that the burst pressure of the flexible hose used to vent oxygen from the high- pressure relief valve of the oxygen cylinder overboard is lower than the opening pressure of the high-pressure relief valve. This pressure difference could cause the flexible hose to burst before it is able to vent excess oxygen overboard. This proposed AD would require replacement of flexible relief hoses for the crew oxygen bottles with new metal design relief hoses. We are proposing this AD to prevent the accumulation of excess oxygen in an enclosed space, which could, if near a source of ignition, cause an uncontrolled oxygen-fed fire.

Federal Register, Volume 81 Issue 70 (Tuesday, April 12, 2016)

[Federal Register Volume 81, Number 70 (Tuesday, April 12, 2016)]
[Proposed Rules]
[Pages 21491-21493]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2016-08270]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-5459; Directorate Identifier 2015-NM-148-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 a design review, which found that the 
burst pressure of the flexible hose used to vent oxygen from the high-
pressure relief valve of the oxygen cylinder overboard is lower than 
the opening pressure of the high-pressure relief valve. This pressure 
difference could cause the flexible hose to burst before it is able to 
vent excess oxygen overboard. This proposed AD would require 
replacement of flexible relief hoses for the crew oxygen bottles with 
new metal design relief hoses. We are proposing this AD to prevent the 
accumulation of excess oxygen in an enclosed space, which could, if 
near a source of ignition, cause an uncontrolled oxygen-fed fire.

DATES: We must receive comments on this proposed AD by May 27, 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 NPRM, 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 
[email protected]; 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-2016-
5459; 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: Fabio Buttitta, 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 516-228-7303; 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-2016-5459; 
Directorate Identifier 2015-NM-148-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-
2015-25, dated September 10, 2015 (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:

    A design review found that the burst pressure of the flexible 
hose used to vent oxygen from the high-pressure relief valve of the 
oxygen cylinder overboard is lower than the opening pressure of the 
high-pressure relief valve. This could cause the flexible hose to 
burst before it is able to vent the excess oxygen overboard. If an 
ignition source is present, the accumulation of oxygen in an 
enclosed space may result in an uncontrolled oxygen-fed fire.
    This [Canadian] AD mandates the replacement of the oxygen 
[flexible] hose assembly with a new design oxygen [metal] hose 
assembly.

    You may examine the MCAI in the AD docket on the Internet at http:/
/

[[Page 21492]]

www.regulations.gov by searching for and locating Docket No. FAA-2016-
5459.

Related Service Information Under 1 CFR Part 51

    Bombardier, Inc. has issued the following service information:
     Service Bulletin 700-35-013, Revision 01, dated July 22, 
2015;
     Service Bulletin 700-35-5001, Revision 01, dated July 22, 
2015;
     Service Bulletin 700-35-6001, Revision 01, dated July 22, 
2015;
     Service Bulletin 700-1A11-35-012, Revision 01, dated July 
22, 2015.
    The service information describes procedures to replace the 
flexible oxygen hoses with metal hoses. 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 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 73 airplanes 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 proposed AD. The average 
labor rate is $85 per work-hour. Required parts would cost about 
$14,483 per product. Based on these figures, we estimate the cost of 
this proposed AD on U.S. operators to be $1,075,874, or $14,738 per 
product.
    According to the manufacturer, some of the costs of this proposed 
AD may be covered under warranty, thereby reducing the cost impact on 
affected individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all costs in our cost 
estimate.

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

Bombardier, Inc.: Docket No. FAA-2016-5459; Directorate Identifier 
2015-NM-148-AD.

(a) Comments Due Date

    We must receive comments by May 27, 2016.

(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, having serial 
numbers (S/Ns) 9002 through 9704 inclusive and 9998.

(d) Subject

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

(e) Reason

    This AD was prompted by a design review, which found that the 
burst pressure of the flexible hose used to vent oxygen from the 
high-pressure relief valve of the oxygen cylinder overboard is lower 
than the opening pressure of the high-pressure relief valve. This 
pressure difference could cause the flexible hose to burst before it 
is able to vent excess oxygen overboard. We are issuing this AD to 
prevent the accumulation of excess oxygen in an enclosed space, 
which could, if near a source of ignition, cause an uncontrolled 
oxygen-fed fire.

(f) Compliance

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

(g) Modification

    Within 2,500 flight hours or 42 months, whichever occurs first, 
after the effective date of this AD, incorporate Bombardier Modsum 
R700T400542 by replacing the oxygen flexible relief hoses for the 
crew oxygen bottles with new metal design hoses, in accordance with 
the Accomplishment Instructions of the applicable service 
information specified in paragraphs (g)(1) through (g)(4) of this 
AD. Airplanes with serial numbers listed in table 1 of paragraph 1, 
``Planning information,'' of the service information specified in 
paragraphs (g)(2) and (g)(4) of this AD have incorporated Modsum 
R700T400542 and meet the requirements of this paragraph.
    (1) For Model BD-700-1A10 airplanes having S/Ns 9002 through 
9312 inclusive, 9314 through 9380 inclusive, and 9384 through 9429 
inclusive: Bombardier Service Bulletin 700-35-013, Revision 01, 
dated July 22, 2015.
    (2) For Model BD-700-1A10 airplanes having S/Ns 9313, 9381, and 
9432 through 9704 inclusive: Bombardier Service Bulletin 700-35-
6001, Revision 01, dated July 22, 2015.
    (3) For Model BD-700-1A11 airplanes having S/Ns 9127 through 
9383 inclusive, 9389 through 9400 inclusive, 9404 through 9431 
inclusive, and 9998: Bombardier Service Bulletin 700-1A11-35-012, 
Revision 01, dated July 22, 2015.
    (4) For Model BD-700-1A11 airplanes having S/Ns 9386, 9401, and 
9445 through

[[Page 21493]]

9702 inclusive: Bombardier Service Bulletin 700-35-5001, Revision 
01, dated July 22, 2015.

(h) Parts Installation Prohibition

    As of the effective date of this AD, no person may install 
oxygen hoses in the low pressure/high pressure discharge system with 
part numbers listed in the ``Used Part No.'' column of Section 3.A, 
``Kit,'' of the applicable service information specified in 
paragraphs (g)(1) through (g)(4) of this AD.

(i) Credit for Previous Actions

    This paragraph provides credit for actions required by paragraph 
(g) of this AD, if those actions were performed before the effective 
date of this AD using the applicable service information identified 
in paragraphs (i)(1) through (i)(4) of this AD, which are not 
incorporated by reference in this AD.
    (1) Bombardier Service Bulletin 700-35-013, dated February 20, 
2015;
    (2) Bombardier Service Bulletin 700-35-5001, dated February 20, 
2015;
    (3) Bombardier Service Bulletin 700-35-6001, dated February 20, 
2015; and
    (4) Bombardier Service Bulletin 700-1A11-35-012, dated February 
20, 2015.

(j) 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, New York ACO, 
ANE-170, 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-2015-25, dated September 
10, 2015, 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-2016-5459.
    (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 [email protected]; 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 March 30, 2016.
Victor Wicklund,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-08270 Filed 4-11-16; 8:45 am]
 BILLING CODE 4910-13-P

Federal Register / Vol. 81, No. 70 / Tuesday, April 12, 2016 / Proposed Rules 21491

(g) Other FAA AD Provisions SUMMARY: We propose to adopt a new regulatory evaluation, any comments
The following provisions also apply to this airworthiness directive (AD) for certain received, and other information. The
AD: Bombardier, Inc. Model BD–700–1A10 street address for the Docket Operations
(1) Alternative Methods of Compliance and BD–700–1A11 airplanes. This office (telephone 800–647–5527) is in
(AMOCs): The Manager, Standards Office, proposed AD was prompted by a design the ADDRESSES section. Comments will
FAA, has the authority to approve AMOCs review, which found that the burst be available in the AD docket shortly
for this AD, if requested using the procedures
found in 14 CFR 39.19. Send information to
pressure of the flexible hose used to after receipt.
ATTN: Karl Schletzbaum, Aerospace vent oxygen from the high-pressure FOR FURTHER INFORMATION CONTACT:
Engineer, FAA, Small Airplane Directorate, relief valve of the oxygen cylinder Fabio Buttitta, Aerospace Engineer,
901 Locust, Room 301, Kansas City, Missouri overboard is lower than the opening Airframe and Mechanical Systems
64106; telephone: (816) 329–4123; fax: (816) pressure of the high-pressure relief Branch, ANE–171, FAA, New York
329–4090; email: karl.schletzbaum@faa.gov. valve. This pressure difference could Aircraft Certification Office (ACO), 1600
Before using any approved AMOC on any cause the flexible hose to burst before it Stewart Avenue, Suite 410, Westbury,
airplane to which the AMOC applies, notify is able to vent excess oxygen overboard.
your appropriate principal inspector (PI) in NY 11590; telephone 516–228–7303; fax
the FAA Flight Standards District Office
This proposed AD would require 516–794–5531.
(FSDO), or lacking a PI, your local FSDO. replacement of flexible relief hoses for SUPPLEMENTARY INFORMATION:
(2) Airworthy Product: For any requirement the crew oxygen bottles with new metal
in this AD to obtain corrective actions from design relief hoses. We are proposing Comments Invited
a manufacturer or other source, use these this AD to prevent the accumulation of We invite you to send any written
actions if they are FAA-approved. Corrective excess oxygen in an enclosed space, relevant data, views, or arguments about
actions are considered FAA-approved if they which could, if near a source of ignition, this proposed AD. Send your comments
are approved by the State of Design Authority cause an uncontrolled oxygen-fed fire. to an address listed under the
(or their delegated agent). You are required
to assure the product is airworthy before it DATES: We must receive comments on ADDRESSES section. Include ‘‘Docket No.
is returned to service. this proposed AD by May 27, 2016. FAA–2016–5459; Directorate Identifier
ADDRESSES: You may send comments, 2015–NM–148–AD’’ at the beginning of
(h) Related Information your comments. We specifically invite
using the procedures found in 14 CFR
Refer to MCAI Civil Aviation Authority 11.43 and 11.45, by any of the following comments on the overall regulatory,
(CAA) AD No. DCA/750XL/7B, dated economic, environmental, and energy
methods:
February 25, 2016, for related information.
You may examine the MCAI on the Internet • Federal eRulemaking Portal: Go to aspects of this proposed AD. We will
http://www.regulations.gov. Follow the consider all comments received by the
at http://www.regulations.gov by searching
for and locating Docket No. FAA–2016–5578. instructions for submitting comments. closing date and may amend this
For service information related to this AD, • Fax: 202–493–2251. proposed AD based on those comments.
contact Pacific Aerospace Limited, Airport • Mail: U.S. Department of We will post all comments we
Road, Hamilton, Private Bag 3027, Hamilton Transportation, Docket Operations, M– receive, without change, to http://
3240, New Zealand; telephone: +64 7 843 30, West Building Ground Floor, Room www.regulations.gov, including any
6144; facsimile: +64 7 843 6134; email: W12–140, 1200 New Jersey Avenue SE., personal information you provide. We
pacific@aerospace.co.nz; Internet: will also post a report summarizing each
Washington, DC 20590.
www.aerospace.co.nz. You may review
copies of the referenced service information • Hand Delivery: U.S. Department of substantive verbal contact we receive
Transportation, Docket Operations, M– about this proposed AD.
at the FAA, Small Airplane Directorate, 901
Locust, Kansas City, Missouri 64106. For 30, West Building Ground Floor, Room Discussion
information on the availability of this W12–140, 1200 New Jersey Avenue SE.,
material at the FAA, call (816) 329–4148. Washington, DC, between 9 a.m. and 5 Transport Canada Civil Aviation
p.m., Monday through Friday, except (TCCA), which is the aviation authority
Issued in Kansas City, Missouri, on April for Canada, has issued Canadian
4, 2016. Federal holidays.
For service information identified in Airworthiness Directive CF–2015–25,
Pat Mullen, dated September 10, 2015 (referred to
Acting Manager, Small Airplane Directorate,
this NPRM, contact Bombardier, Inc.,
400 Côte-Vertu Road West, Dorval, after this as the Mandatory Continuing
Aircraft Certification Service. Airworthiness Information, or ‘‘the
[FR Doc. 2016–08261 Filed 4–11–16; 8:45 am]
Québec H4S 1Y9, Canada; telephone
514–855–5000; fax 514–855–7401; email MCAI’’), to correct an unsafe condition
BILLING CODE 4910–13–P
thd.crj@aero.bombardier.com; Internet for certain Bombardier, Inc. Model BD–
http://www.bombardier.com. You may 700–1A10 and BD–700–1A11 airplanes.
view this referenced service information The MCAI states:
DEPARTMENT OF TRANSPORTATION
at the FAA, Transport Airplane A design review found that the burst
Federal Aviation Administration Directorate, 1601 Lind Avenue SW., pressure of the flexible hose used to vent
Renton, WA. For information on the oxygen from the high-pressure relief valve of
availability of this material at the FAA, the oxygen cylinder overboard is lower than
14 CFR Part 39 the opening pressure of the high-pressure
call 425–227–1221. relief valve. This could cause the flexible
[Docket No. FAA–2016–5459; Directorate
Identifier 2015–NM–148–AD] Examining the AD Docket hose to burst before it is able to vent the
excess oxygen overboard. If an ignition
RIN 2120–AA64 You may examine the AD docket on
jstallworth on DSK7TPTVN1PROD with PROPOSALS

source is present, the accumulation of oxygen
the Internet at http:// in an enclosed space may result in an
Airworthiness Directives; Bombardier, www.regulations.gov by searching for uncontrolled oxygen-fed fire.
Inc. Airplanes and locating Docket No. FAA–2016– This [Canadian] AD mandates the
5459; or in person at the Docket replacement of the oxygen [flexible] hose
AGENCY: Federal Aviation assembly with a new design oxygen [metal]
Administration (FAA), DOT. Management Facility between 9 a.m.
and 5 p.m., Monday through Friday, hose assembly.
ACTION: Notice of proposed rulemaking
except Federal holidays. The AD docket You may examine the MCAI in the
(NPRM).
contains this proposed AD, the AD docket on the Internet at http://

VerDate Sep<11>2014 15:12 Apr 11, 2016 Jkt 238001 PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 E:\FR\FM\12APP1.SGM 12APP1

21492 Federal Register / Vol. 81, No. 70 / Tuesday, April 12, 2016 / Proposed Rules

www.regulations.gov by searching for the FAA Administrator. ‘‘Subtitle VII: Bombardier, Inc.: Docket No. FAA–2016–
and locating Docket No. FAA–2016– Aviation Programs,’’ describes in more 5459; Directorate Identifier 2015–NM–
5459. detail the scope of the Agency’s 148–AD.
authority. (a) Comments Due Date
Related Service Information Under 1
CFR Part 51 We are issuing this rulemaking under We must receive comments by May 27,
the authority described in ‘‘Subtitle VII, 2016.
Bombardier, Inc. has issued the Part A, Subpart III, Section 44701:
following service information: (b) Affected ADs
General requirements.’’ Under that
• Service Bulletin 700–35–013, section, Congress charges the FAA with None.
Revision 01, dated July 22, 2015; promoting safe flight of civil aircraft in (c) Applicability
• Service Bulletin 700–35–5001, air commerce by prescribing regulations This AD applies to Bombardier, Inc. Model
Revision 01, dated July 22, 2015; for practices, methods, and procedures BD–700–1A10 and BD–700–1A11 airplanes,
• Service Bulletin 700–35–6001, the Administrator finds necessary for certificated in any category, having serial
Revision 01, dated July 22, 2015; safety in air commerce. This regulation numbers (S/Ns) 9002 through 9704 inclusive
• Service Bulletin 700–1A11–35–012, is within the scope of that authority and 9998.
Revision 01, dated July 22, 2015. because it addresses an unsafe condition (d) Subject
The service information describes that is likely to exist or develop on
procedures to replace the flexible Air Transport Association (ATA) of
products identified in this rulemaking America Code 35, Oxygen.
oxygen hoses with metal hoses. This action.
service information is reasonably (e) Reason
available because the interested parties Regulatory Findings This AD was prompted by a design review,
have access to it through their normal We determined that this proposed AD which found that the burst pressure of the
course of business or by the means flexible hose used to vent oxygen from the
would not have federalism implications high-pressure relief valve of the oxygen
identified in the ADDRESSES section. under Executive Order 13132. This cylinder overboard is lower than the opening
FAA’s Determination and Requirements proposed AD would not have a pressure of the high-pressure relief valve.
of This Proposed AD substantial direct effect on the States, on This pressure difference could cause the
the relationship between the national flexible hose to burst before it is able to vent
This product has been approved by excess oxygen overboard. We are issuing this
Government and the States, or on the
the aviation authority of another AD to prevent the accumulation of excess
distribution of power and
country, and is approved for operation oxygen in an enclosed space, which could, if
responsibilities among the various near a source of ignition, cause an
in the United States. Pursuant to our
levels of government. uncontrolled oxygen-fed fire.
bilateral agreement with the State of
Design Authority, we have been notified For the reasons discussed above, I
(f) Compliance
of the unsafe condition described in the certify this proposed regulation:
1. Is not a ‘‘significant regulatory Comply with this AD within the
MCAI and service information compliance times specified, unless already
referenced above. We are proposing this action’’ under Executive Order 12866; done.
AD because we evaluated all pertinent 2. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures (g) Modification
information and determined an unsafe
condition exists and is likely to exist or (44 FR 11034, February 26, 1979); Within 2,500 flight hours or 42 months,
3. Will not affect intrastate aviation in whichever occurs first, after the effective date
develop on other products of the same of this AD, incorporate Bombardier Modsum
type design. Alaska; and
R700T400542 by replacing the oxygen
4. Will not have a significant flexible relief hoses for the crew oxygen
Costs of Compliance economic impact, positive or negative, bottles with new metal design hoses, in
We estimate that this proposed AD on a substantial number of small entities accordance with the Accomplishment
affects 73 airplanes of U.S. registry. under the criteria of the Regulatory Instructions of the applicable service
We also estimate that it will take Flexibility Act. information specified in paragraphs (g)(1)
about 3 work-hours per product to through (g)(4) of this AD. Airplanes with
comply with the basic requirements of List of Subjects in 14 CFR Part 39 serial numbers listed in table 1 of paragraph
1, ‘‘Planning information,’’ of the service
this proposed AD. The average labor Air transportation, Aircraft, Aviation information specified in paragraphs (g)(2)
rate is $85 per work-hour. Required safety, Incorporation by reference, and (g)(4) of this AD have incorporated
parts would cost about $14,483 per Safety. Modsum R700T400542 and meet the
product. Based on these figures, we requirements of this paragraph.
The Proposed Amendment (1) For Model BD–700–1A10 airplanes
estimate the cost of this proposed AD on
U.S. operators to be $1,075,874, or Accordingly, under the authority having S/Ns 9002 through 9312 inclusive,
$14,738 per product. delegated to me by the Administrator, 9314 through 9380 inclusive, and 9384
through 9429 inclusive: Bombardier Service
According to the manufacturer, some the FAA proposes to amend 14 CFR part Bulletin 700–35–013, Revision 01, dated July
of the costs of this proposed AD may be 39 as follows: 22, 2015.
covered under warranty, thereby (2) For Model BD–700–1A10 airplanes
reducing the cost impact on affected PART 39—AIRWORTHINESS having S/Ns 9313, 9381, and 9432 through
individuals. We do not control warranty DIRECTIVES 9704 inclusive: Bombardier Service Bulletin
coverage for affected individuals. As a 700–35–6001, Revision 01, dated July 22,
jstallworth on DSK7TPTVN1PROD with PROPOSALS

result, we have included all costs in our ■ 1. The authority citation for part 39 2015.
cost estimate. continues to read as follows: (3) For Model BD–700–1A11 airplanes
having S/Ns 9127 through 9383 inclusive,
Authority: 49 U.S.C. 106(g), 40113, 44701.
Authority for This Rulemaking 9389 through 9400 inclusive, 9404 through
§ 39.13 [Amended] 9431 inclusive, and 9998: Bombardier
Title 49 of the United States Code Service Bulletin 700–1A11–35–012, Revision
specifies the FAA’s authority to issue ■ 2. The FAA amends § 39.13 by adding 01, dated July 22, 2015.
rules on aviation safety. Subtitle I, the following new airworthiness (4) For Model BD–700–1A11 airplanes
section 106, describes the authority of directive (AD): having S/Ns 9386, 9401, and 9445 through

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Document Created: 2016-04-12 00:46:36
Document Modified: 2016-04-12 00:46:36

Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Proposed Rules
Action		Notice of proposed rulemaking (NPRM).
Dates		We must receive comments on this proposed AD by May 27, 2016.
Contact		Fabio Buttitta, 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 516-228-7303; fax 516-794-5531.
FR Citation		81 FR 21491
RIN Number		2120-AA64
CFR Associated		Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

81 FR 21491 - Airworthiness Directives; Bombardier, Inc. Airplanes

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 81, Issue 70 (April 12, 2016)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration