Rule2022-16612
Airworthiness Directives; The Boeing Company Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
August 11, 2022
Effective
September 15, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-700, 737-800, 747-400, 747-8, 767- 400ER, and 777-200 airplanes. This AD was prompted by a report that there is the potential for electrical current to pass through low pressure (LP) oxygen flex-hoses in the gaseous passenger oxygen system. This AD requires replacing each conductive oxygen flex-hose installed on LP gaseous passenger oxygen systems with a serviceable non- conductive oxygen flex-hose. This AD also prohibits installation of a conductive oxygen flex-hose on LP gaseous passenger oxygen systems. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 154 (Thursday, August 11, 2022)</title>
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[Federal Register Volume 87, Number 154 (Thursday, August 11, 2022)]
[Rules and Regulations]
[Pages 49515-49519]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-16612]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0462; Project Identifier MCAI-2021-00647-T;
Amendment 39-22104; AD 2022-13-18]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain The Boeing Company Model 737-700, 737-800, 747-400, 747-8, 767-
400ER, and 777-200 airplanes. This AD was prompted by a report that
there is the potential for electrical current to pass through low
pressure (LP) oxygen flex-hoses in the gaseous passenger oxygen system.
This AD requires replacing each conductive oxygen flex-hose installed
on LP gaseous passenger oxygen systems with a serviceable non-
conductive oxygen flex-hose. This AD also prohibits installation of a
conductive oxygen flex-hose on LP gaseous passenger oxygen systems. The
FAA is issuing this AD to address the unsafe condition on these
products.
DATES: This AD is effective September 15, 2022.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of September 15,
2022.
ADDRESSES: For service information identified in this final rule,
contact Lufthansa Technik AG, Weg beim J[auml]ger 193 22335 Hamburg,
Germany; telephone 49-40-5070-67428; internet <a href="http://www.lufthansa-technik.com">www.lufthansa-technik.com</a>. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety 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 <a href="http://www.regulations.gov">www.regulations.gov</a> by searching for and locating Docket
No. FAA-2022-0462.
Examining the AD Docket
You may examine the AD docket on the internet at
<a href="http://www.regulations.gov">www.regulations.gov</a> by searching for and locating Docket No. FAA-2022-
0462; 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, any comments received, and other information. The
address for Docket Operations 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: Chirayu Gupta, Aerospace Engineer,
Mechanical Systems and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#d3eafeb2a5a0febdaab2b0bcfeb0bca093b5b2b2fdb4bca5"><span class="__cf_email__" data-cfemail="c8f1e5a9bebbe5a6b1a9aba7e5aba7bb88aea9a9e6afa7be">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The European Union Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union, has issued
EASA AD 2021-0135, dated June 2, 2021 (EASA AD 2021-0135) (also
referred to as the Mandatory Continuing Airworthiness Information, or
the MCAI), to correct an unsafe condition for certain The Boeing
Company Model 737-700, 737-800, 747-400, 747-8, 767-400ER, and 777-200
airplanes with certain Lufthansa Technik AG supplemental type
certificates (STCs), which resulted in the installation of conductive
oxygen flex-hoses. You may examine the MCAI in the AD docket on the
internet at <a href="http://www.regulations.gov">www.regulations.gov</a> by searching for and locating Docket
No. FAA-2022-0462.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain The Boeing
Company Model 737-700, 737-800, 747-400, 747-8, 767-400ER, and 777-200
airplanes. The NPRM published in the Federal Register on April 22, 2022
(87 FR 24073). The NPRM was prompted by a report that there is the
potential for electrical current to pass through LP oxygen flex-hoses
in the gaseous passenger oxygen system. Exposure to electrical faults,
such as unintended short circuits, can result in localized electrical
heating of the LP oxygen flex-hoses. The NPRM proposed to require
replacing each conductive oxygen flex-hose installed on LP gaseous
passenger oxygen systems with a serviceable non-conductive oxygen flex-
hose. The FAA is issuing this AD to address the possibility of
electrical current passing through the LP oxygen flex-hoses in the
gaseous passenger oxygen system, which could cause the flex-hoses to
melt or burn and result in an oxygen-fed fire in the passenger cabin.
See the MCAI for additional background information.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from Boeing who supported the NPRM
without change. The FAA also received a comment from United Airlines
who stated that the NPRM does not apply to any of its airplanes.
Effect of Winglets on Accomplishment of the Proposed Actions
Aviation Partners Boeing stated that the installation of winglets
per STC ST00830SE does not affect the accomplishment of the
manufacturer's service instructions. The commenter noted that this STC
is for the applicable Model 737-700 and 737-800 airplanes identified in
the proposed AD and that it does not have any STCs for the other models
in the proposed AD.
The FAA agrees with the commenter that STC ST00830SE does not
affect the accomplishment of the manufacturer's service instructions.
Therefore, the installation of STC ST00830SE does not affect the
ability to accomplish the actions required by this AD. The FAA has not
changed this AD in this regard.
Clarification of AD Applicability Revision
Paragraph (c) of the proposed AD referred only to FAA STC ST04127NY
that the FAA has since determined only applies to a modification of a
Boeing Model 747-8 airplane that included the installation of
conductive oxygen flex-hoses. The FAA intended the AD applicability to
not be limited to just manufacturer serial number (MSN) 37500 that was
modified by STC ST04127NY, but to all MSNs identified in the proposed
AD that were modified by a Lufthansa Technik AG STC, which resulted in
the installation of conductive oxygen flex-hoses. Therefore, the FAA
has determined that including reference to the STCs that installed the
conductive oxygen flex-hoses is redundant and unnecessary. Paragraph
(c) of this AD has been revised in order to clarify this AD is
applicable to the MSNs identified in paragraph (c) of this AD that have
conductive oxygen flex-hoses specified in paragraph (g) of this AD.
Conclusion
The FAA reviewed the relevant data, considered the comments
received, and determined that air safety requires adopting this AD as
proposed. Except for minor editorial changes, this AD is adopted as
proposed in the NPRM. None of the changes will increase the economic
burden on any operator.
[[Page 49516]]
Accordingly, the FAA is issuing this AD to address the unsafe condition
on these products.
Related Service Information Under 1 CFR Part 51
Lufthansa Technik AG has issued the following service information.
<bullet> Lufthansa Technik Design Change Summary ASN-00-DCS-01,
Revision 8, dated November 5, 2020.
<bullet> Lufthansa Technik Design Change Summary ATB-25-DCS-01,
Revision 10, dated January 7, 2021.
<bullet> Lufthansa Technik Design Change Summary ATR-23-DCS-01,
Revision 2, dated January 7, 2021.
<bullet> Lufthansa Technik Design Change Summary BCM-35-DCS-01,
dated January 4, 2021.
<bullet> Lufthansa Technik Design Change Summary BCP-35-DCS-01,
Revision 1, dated April 20, 2021.
<bullet> Lufthansa Technik Design Change Summary BCQ-35-DCS-01,
Revision 1, dated April 20, 2021.
<bullet> Lufthansa Technik Design Change Summary BCR-35-DCS-01,
Revision 1, dated April 20, 2021.
<bullet> Lufthansa Technik Design Change Summary BCS-35-DCS-01,
dated January 5, 2021.
<bullet> Lufthansa Technik Design Change Summary BCU-35-DCS-01,
dated January 5, 2021.
<bullet> Lufthansa Technik Design Change Summary BCV-35-DCS-01,
dated February 4, 2021.
<bullet> Lufthansa Technik Design Change Summary BCW-35-DCS-01,
dated January 4, 2021.
<bullet> Lufthansa Technik Design Change Summary BCX-35-DCS-01,
Revision 1, dated February 4, 2021.
This service information describes procedures for replacing each
conductive oxygen flex-hose installed on LP gaseous passenger oxygen
systems with a serviceable non-conductive oxygen flex-hose. These
documents are distinct since they apply to different airplane models
and manufacturer serial numbers.
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
The FAA estimates that this AD will affect 7 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
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Labor cost Parts cost Cost per product Cost on U.S. operators
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Up to 17 work-hours x $85 per hour = Up $10,090 Up to $11,535............. Up to $80,745.
to $1,445.
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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.
The FAA is 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
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) Will not affect intrastate aviation in Alaska, and
(3) 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 Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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:
2022-13-18 The Boeing Company: Amendment 39-22104; Docket No. FAA-
2022-0462; Project Identifier MCAI-2021-00647-T.
(a) Effective Date
This airworthiness directive (AD) is effective September 15,
2022.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 737-700, 737-800,
747-400, 747-8, 767-400ER, and 777-200 airplanes, certificated in
any category, manufacturer serial numbers (MSN) 28551, 28961, 29953,
30791, 30884, 32445, 32575, 32915, 32970, 32971, 33010, 33102,
33361, 33684, 34205, 37500, and 37544, with conductive oxygen flex-
hose having part number specified in paragraph (g) of this AD.
(d) Subject
Air Transport Association (ATA) of America Code 35, Oxygen.
(e) Unsafe Condition
This AD was prompted by a report that there is the potential for
electrical current to pass through low pressure (LP) oxygen flex-
hoses in the gaseous passenger oxygen system. The FAA is issuing
this AD to address this condition, which could cause the flex-hoses
to melt or burn and result in an oxygen-fed fire in the passenger
cabin.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Replacement
Within 48 months after the effective date of this AD: Replace
each conductive oxygen flex-hose installed on LP gaseous passenger
oxygen systems with a serviceable non-
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conductive oxygen flex-hose, in accordance with the Accomplishment
Instructions of the applicable Lufthansa Technik Design Change
Summary (TS-145 Installation Document Number) corresponding to the
affected part numbers specified in figure 1 to paragraph (g) of this
AD.
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(h) Parts Installation Prohibition
As of the effective date of this AD, no person may install a
prohibited conductive oxygen flex-hose specified in figure 1 to
paragraph (g) of this AD, on LP gaseous passenger oxygen systems on
any airplane.
(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 service information in paragraphs (i)(1)
through (6) of this AD.
(1) Lufthansa Technik Design Change Summary ASN-00-DCS-01,
Revision 6, dated June 25, 2020.
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(2) Lufthansa Technik Design Change Summary ASN-00-DCS-01,
Revision 7, dated August 26, 2020.
(3) Lufthansa Technik Design Change Summary BCP-35-DCS-01, dated
January 5, 2021.
(4) Lufthansa Technik Design Change Summary BCQ-35-DCS-01, dated
January 7, 2021.
(5) Lufthansa Technik Design Change Summary BCR-35-DCS-01, dated
January 7, 2021.
(6) Lufthansa Technik Design Change Summary BCX-35-DCS-01, dated
January 7, 2021.
(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 responsible Flight Standards 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. Before using any
approved AMOC, notify your appropriate principal inspector, or
lacking a principal inspector, the manager of the responsible Flight
Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, Large Aircraft
Section, International Validation Branch, FAA; or the European Union
Aviation Safety Agency (EASA); or Lufthansa Technik AG's EASA Design
Organization Approval (DOA). If approved by the DOA, the approval
must include the DOA-authorized signature.
(k) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) EASA AD 2021-0135, dated June 2, 2021, for related
information. This MCAI may be found in the AD docket on the internet
at <a href="http://www.regulations.gov">www.regulations.gov</a> by searching for and locating Docket No. FAA-
2022-0462.
(2) For more information about this AD, contact Chirayu Gupta,
Aerospace Engineer, Mechanical Systems and Administrative Services
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#9ba2b6faede8b6f5e2faf8f4b6f8f4e8dbfdfafab5fcf4ed"><span class="__cf_email__" data-cfemail="dce5f1bdaaaff1b2a5bdbfb3f1bfb3af9cbabdbdf2bbb3aa">[email protected]</span></a>.
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (l)(4) and (5) of this AD.
(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) Lufthansa Technik Design Change Summary ASN-00-DCS-01,
Revision 8, dated November 5, 2020.
(ii) Lufthansa Technik Design Change Summary ATB-25-DCS-01,
Revision 10, dated January 7, 2021.
(iii) Lufthansa Technik Design Change Summary ATR-23-DCS-01,
Revision 2, dated January 7, 2021.
(iv) Lufthansa Technik Design Change Summary BCM-35-DCS-01,
dated January 4, 2021.
(v) Lufthansa Technik Design Change Summary BCP-35-DCS-01,
Revision 1, dated April 20, 2021.
(vi) Lufthansa Technik Design Change Summary BCQ-35-DCS-01,
Revision 1, dated April 20, 2021.
(vii) Lufthansa Technik Design Change Summary BCR-35-DCS-01,
Revision 1, dated April 20, 2021.
(viii) Lufthansa Technik Design Change Summary BCS-35-DCS-01,
dated January 5, 2021.
(ix) Lufthansa Technik Design Change Summary BCU-35-DCS-01,
dated January 5, 2021.
(x) Lufthansa Technik Design Change Summary BCV-35-DCS-01, dated
February 4, 2021.
(xi) Lufthansa Technik Design Change Summary BCW-35-DCS-01,
dated January 4, 2021.
(xii) Lufthansa Technik Design Change Summary BCX-35-DCS-01,
Revision 1, dated February 4, 2021.
(3) For service information identified in this AD, contact
Lufthansa Technik AG, Weg beim J[auml]ger 193 22335 Hamburg,
Germany; telephone 49-40-5070-67428; internet <a href="http://www.lufthansa-technik.com">www.lufthansa-technik.com</a>.
(4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety 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, email <a href="/cdn-cgi/l/email-protection#5137237f383f2221343225383e3f113f3023307f363e27"><span class="__cf_email__" data-cfemail="b7d1c599ded9c4c7d2d4c3ded8d9f7d9d6c5d699d0d8c1">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on June 17, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-16612 Filed 8-10-22; 8:45 am]
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