Proposed Rule2024-21689
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
September 26, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 2022-15-06, which applies to all The Boeing Company Model 777-200, - 200LR, -300, -300ER, and 777F series airplanes. AD 2022-15-06 requires disconnecting certain connectors and capping and stowing the wires that had been attached to the affected transorb modules. Since the FAA issued AD 2022-15-06, the agency has determined additional connectors are affected. Also, a replacement has been developed to address the unsafe condition, which would terminate the existing actions. This proposed AD would continue to require the actions specified in AD 2022- 15-06 and would require those actions for additional connectors. This proposed AD would also require determining if affected transorb modules are installed, replacing or testing affected transorb modules, and applicable on-condition actions. This proposed AD would also prohibit the installation of affected parts. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 187 (Thursday, September 26, 2024)</title>
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[Federal Register Volume 89, Number 187 (Thursday, September 26, 2024)]
[Proposed Rules]
[Pages 78827-78831]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-21689]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2144; Project Identifier AD-2024-00424-T]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD)
2022-15-06, which applies to all The Boeing Company Model 777-200, -
200LR, -300, -300ER, and 777F series airplanes. AD 2022-15-06 requires
disconnecting certain connectors and capping and stowing the wires that
had been attached to the affected transorb modules. Since the FAA
issued AD 2022-15-06, the agency has determined additional connectors
are affected. Also, a replacement has been developed to address the
unsafe condition, which would terminate the existing actions. This
proposed AD would continue to require the actions specified in AD 2022-
15-06 and would require those actions for additional connectors. This
proposed AD would also require determining if affected transorb modules
are installed, replacing or testing affected transorb modules, and
applicable on-condition actions. This proposed AD would also prohibit
the installation of affected parts. The FAA is proposing this AD to
address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by November
12, 2024.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room
[[Page 78828]]
W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2144; 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 NPRM, any comments received, and other
information. The street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For the material identified in this proposed AD, contact
Boeing Commercial Airplanes, Attention: Contractual & Data Services
(C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600;
telephone 562-797-1717; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
<bullet> You may view this material 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 at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-2144.
FOR FURTHER INFORMATION CONTACT: Raja Vengadasalam, Aviation Safety
Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-
231-3859; email: <a href="/cdn-cgi/l/email-protection#5e2c3f343f70283b30393f3a3f2d3f323f331e383f3f70393128"><span class="__cf_email__" data-cfemail="384a595259164e5d565f595c594b59545955785e5959165f574e">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2024-2144;
Project Identifier AD-2024-00424-T'' at the beginning of your comments.
The most helpful comments reference a specific portion of the proposal,
explain the reason for any recommended change, and include supporting
data. The FAA will consider all comments received by the closing date
and may amend this proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this NPRM.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to Raja
Vengadasalam, Aviation Safety Engineer, FAA, 2200 South 216th St., Des
Moines, WA 98198; phone: 206-231-3859; email:
<a href="/cdn-cgi/l/email-protection#9fedfef5feb1e9faf1f8fefbfeecfef3fef2dff9fefeb1f8f0e9"><span class="__cf_email__" data-cfemail="b6c4d7dcd798c0d3d8d1d7d2d7c5d7dad7dbf6d0d7d798d1d9c0">[email protected]</span></a>. Any commentary that the FAA receives that is
not specifically designated as CBI will be placed in the public docket
for this rulemaking.
Background
The FAA issued AD 2022-15-06, Amendment 39-22126 (87 FR 47334,
August 3, 2022) (AD 2022-15-06), for all The Boeing Company Model 777-
200, -200LR, -300, -300ER, and 777F series airplanes. AD 2022-15-06 was
prompted by high electrical resistance within the gust suppression
sensor (GSS) transorb modules due to corrosion on the transorb threads.
AD 2022-15-06 requires disconnecting certain connectors and capping and
stowing the wires that had been attached to the affected transorb
modules. The FAA issued AD 2022-15-06 to address high electrical
resistance in both transorb modules, which can result in two actuator
control electronics (ACEs) being exposed to damaging lightning
transient voltages in excess of the qualification levels, potentially
inducing erroneous or oscillatory outputs to flight control surfaces.
The unsafe condition, if not addressed, could result in loss of control
of the airplane.
Actions Since AD 2022-15-06 Was Issued
Since the FAA issued AD 2022-15-06, a replacement mitigating action
has been developed to address the unsafe condition, which would
terminate the existing actions. The preamble to AD 2022-15-06 explains
that the FAA considers the requirements ``interim action'' and may
consider further rulemaking. The FAA has now determined that further
rulemaking is indeed necessary, and the replacement specified in this
proposed AD follows from that determination.
In addition, Boeing and several operators notified the FAA that
certain bundles/connectors were not identified in AD 2022-15-06. Boeing
noted that there are connector designation variances between earlier
and later Model 777 airplanes and that bundle/connector W7314/D02099P
is on the right-hand side of certain line number airplanes. Boeing
stated it sent a Boeing multi-operator message to operators to reduce
confusion and recommended bundle/connector W7314/D02099P be identified
as an affected bundle/connector. American Airlines, Qatar Airways, and
United Airlines also noted that bundle/connector W7314/D02099P is not
identified in AD 2022-15-06. United Airlines, All Nippon Airways, and
Kilitta Air, LLC, noted that bundle/connector W6313/D02098P is not
identified in AD 2022-15-06 but it is identified as a bundle/connector
for certain airplanes.
The FAA has determined the additional connectors are affected by
the unsafe condition. Therefore, this proposed AD would require that
operators disconnect the connectors and cap and stow the wires to
bundles/connectors W6313/D02098P and W7314/D02099P until the proposed
replacement is done as specified in paragraph (h) of this proposed AD.
FAA's Determination
The FAA is issuing this NPRM after determining that the unsafe
condition described previously is likely to exist or develop on other
products of the same type design.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin 777-27A0125 RB,
dated February 3, 2023. This material specifies procedures for
replacing affected transorb modules with new or serviceable transorb
modules or testing affected transorb modules and accomplishing
applicable on-condition actions. The on-condition actions include part
marking any module that meets certain specifications or replacing any
modules that do not meet the specifications.
This material 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.
[[Page 78829]]
Proposed AD Requirements in This NPRM
This proposed AD would retain all requirements of AD 2022-15-06 and
would require those actions for additional connectors. This proposed AD
would also require determining if affected transorb modules are
installed, replacing or testing affected transorb modules, and
applicable on-condition actions. This proposed AD would also prohibit
the installation of affected parts.
For information on the procedures and compliance times, see Boeing
Alert Requirements Bulletin 777-27A0125 RB, dated February 3, 2023, at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-2144.
Differences Between This Proposed AD and the Referenced Material
The effectivity of Boeing Alert Requirements Bulletin 777-27A0125
RB, dated February 3, 2023, is limited to Model 777-200, -200LR, -300,
-300ER, and 777F series airplanes, having certain line numbers.
However, the applicability of this proposed AD includes all Model 777-
200, -200LR, -300, -300ER, and 777F series airplanes. Because the
affected parts are rotable parts, the FAA has determined that these
parts could later be installed on airplanes that were initially
delivered with acceptable parts, thereby subjecting those airplanes to
the unsafe condition. The FAA has confirmed with Boeing that the
Accomplishment Instructions in Boeing Alert Requirements Bulletin 777-
27A0125 RB, dated February 3, 2023, are applicable to the expanded
group of airplanes.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 312 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs
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Action Labor cost Parts cost Cost per product Cost on U.S. operators
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Disconnecting connectors, capping 3 work-hours x $85 per hour $0......................... $255....................... $79,560.
and stowing wires (retained = $255.
actions from AD 2022-15-06).
Disconnecting additional 3 work-hours x $85 per hour $0......................... $255....................... $79,560.
connectors, capping and stowing = $255.
wires (new proposed action).
Determining if affected transorb Up to 3 work-hours x $85 Up to $3,668............... Up to $3,923............... Up to $1,223,976.
modules are installed, and per hour = $255.
replacing or testing affected
modules (new proposed action).
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The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of the
proposed testing. The agency has no way of determining the number of
aircraft that might need these actions:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Part marking or replacing Up to 3 work-hours x $85 Up to $3,668............ Up to $3,923.
affected modules. per hour = $255.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this proposed AD may be covered under warranty, thereby reducing the
cost impact on affected operators.
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
The FAA 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) Would not affect intrastate aviation in Alaska, and
(3) Would 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:
[[Page 78830]]
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:
0
a. Removing Airworthiness Directive (AD) 2022-15-06, Amendment 39-22126
(87 FR 47334, August 3, 2022), and
0
b. Adding the following new AD:
The Boeing Company: Docket No. FAA-2024-2144; Project Identifier AD-
2024-00424-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by November 12, 2024.
(b) Affected ADs
This AD replaces AD 2022-15-06, Amendment 39-22126 (87 FR 47334,
August 3, 2022) (AD 2022-15-06).
(c) Applicability
This AD applies to all The Boeing Company Model 777-200, -200LR,
-300, -300ER, and 777F series airplanes, certificated in any
category.
(d) Subject
Air Transport Association (ATA) of America Code 27, Flight
controls.
(e) Unsafe Condition
This AD was prompted by high electrical resistance within the
gust suppression sensor (GSS) transorb modules due to corrosion on
the transorb threads and insufficient engagement of the anti-
rotation teeth. The FAA is issuing this AD to address high
electrical resistance in both transorb modules, which can result in
two actuator control electronics (ACEs) being exposed to damaging
lightning transient voltages in excess of the qualification levels,
potentially inducing erroneous or oscillatory outputs to flight
control surfaces. The unsafe condition, if not addressed, could
result in loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Requirement To Disconnect, Cap, and Stow Transorb Module
Connectors, With No Changes
This paragraph restates the requirements of paragraph (g) of AD
2022-15-06, with no changes. At the later of the times specified in
paragraphs (g)(1) and (2) of this AD: Disconnect the connectors and
cap and stow the wires to bundles/connectors W7314/D02006P and
W7579/D02005P from the transorb module part numbers CLPT-12SP-06, -
07, and -67.
Note 1 to the introductory text of paragraph (g): Guidance on
locating wire bundles/connectors W7314/D02006P and W7579/D02005P can
be found in Section 05-55-43 of the Boeing 777 aircraft maintenance
manual.
Note 2 to the introductory text of paragraph (g): Guidance on
capping and stowing the wires once they are disconnected can be
found in Section 20-10-11 of the Boeing Standard Wiring Practices
Manual.
(1) Before the accumulation of 75,000 total flight hours or
23,000 total flight cycles, whichever occurs first.
(2) Within 3 months after August 18, 2022 (the effective date of
AD 2022-15-06).
(h) New Requirement To Disconnect, Cap, and Stow Certain Other Transorb
Module Connectors
At the later of the times specified in paragraphs (h)(1) and (2)
of this AD: Disconnect the connectors and cap and stow the wires to
bundles/connectors W6313/D02098P and W7314/D02099P from the transorb
module part numbers CLPT-12SP-06, -07, and -67.
Note 3 to the introductory text of paragraph (h): Guidance on
locating wire bundles/connectors W6313/D02098P and W7314/D02099P can
be found in Section 05-55-43 of the Boeing 777 aircraft maintenance
manual.
Note 4 to the introductory text of paragraph (h): Guidance on
capping and stowing the wires once they are disconnected can be
found in Section 20-10-11 of the Boeing Standard Wiring Practices
Manual.
(1) Before the accumulation of 75,000 total flight hours or
23,000 total flight cycles, whichever occurs first.
(2) Within 3 months after the effective date of this AD.
(i) New Required Actions
(1) For airplanes with original airworthiness certificate or
original export certificate of airworthiness issued on or before the
effective date of this AD: At the later of the times specified in
paragraph (i)(1)(i) or (ii) of this AD, do an inspection to
determine if any airplane has a transorb module with part number
CLPT-12SP-06, -07, or -67 installed. A review of airplane
maintenance records is acceptable in lieu of the inspection if the
part numbers can be conclusively determined from that review.
(i) Within 24 months after the effective date of this AD.
(ii) Within 24 months after the date of issuance of the original
standard certificate of airworthiness or the original export
certificate of airworthiness.
(2) If, during any inspection or records review required by
paragraph (i)(1) of this AD, any transorb module with part number
CLPT-12SP-06, -07, or -67 is found: Except as specified by paragraph
(j) of this AD, at the applicable times specified in the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin 777-
27A0125 RB, dated February 3, 2023, do all applicable actions
identified in, and in accordance with, the Accomplishment
Instructions of Boeing Alert Requirements Bulletin 777-27A0125 RB,
dated February 3, 2023. Doing the replacement required by this
paragraph terminates the requirements of paragraphs (g) and (h) of
this AD.
Note 5 to paragraph (i)(2): Guidance for accomplishing the
actions required by paragraph (i)(2) of this AD can be found in
Boeing Alert Service Bulletin 777-27A0125, dated February 3, 2023,
which is referred to in Boeing Alert Requirements Bulletin 777-
27A0125 RB, dated February 3, 2023.
(j) Exception to Requirements Bulletin Specifications
Where the Compliance Time column of the table in the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin 777-
27A0125 RB, dated February 3, 2023, refers to the original issue
date of Requirements Bulletin 777-27A0125 RB, this AD requires using
the effective date of this AD.
(k) Parts Installation Prohibition
As of the effective date of this AD, no person may install a
transorb module, part numbers CLPT-12SP-06, CLPT-12SP-07, and CLPT-
12SP-67, on any airplane.
(l) Alternative Methods of Compliance (AMOCs)
(1) The Manager, AIR-520, Continued Operational Safety 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 the attention of the person identified in paragraph
(m)(1) of this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#1554585a56557374743b727a63"><span class="__cf_email__" data-cfemail="a7e6eae8e4e7c1c6c689c0c8d1">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards Office.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair, modification, or alteration required by this AD
if it is approved by The Boeing Company Organization Designation
Authorization (ODA) that has been authorized by the Manager, AIR-
520, Continued Operational Safety Branch, FAA, to make those
findings. To be approved, the repair method, modification deviation,
or alteration deviation must meet the certification basis of the
airplane, and the approval must specifically refer to this AD.
(4) AMOCs approved for AD 2022-15-06 are approved as AMOCs for
the corresponding provisions of paragraph (g) of this AD.
(m) Related Information
(1) For more information about this AD, contact Raja
Vengadasalam, Aviation Safety Engineer, FAA, 2200 South 216th St.,
Des Moines, WA 98198; phone: 206-231-3859; email:
<a href="/cdn-cgi/l/email-protection#88fae9e2e9a6feede6efe9ece9fbe9e4e9e5c8eee9e9a6efe7fe"><span class="__cf_email__" data-cfemail="d0a2b1bab1fea6b5beb7b1b4b1a3b1bcb1bd90b6b1b1feb7bfa6">[email protected]</span></a>.
(2) Material identified in this AD that is not incorporated by
reference is available at the address specified in paragraph (n)(3)
of this AD.
(n) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the material listed in this paragraph
under 5 U.S.C. 552(a) and 1 CFR part 51.
[[Page 78831]]
(2) You must use this material as applicable to do the actions
required by this AD, unless the AD specifies otherwise.
(i) Boeing Alert Requirements Bulletin 777-27A0125 RB, dated
February 3, 2023.
(ii) [Reserved]
(3) For the material identified in this AD, contact Boeing
Commercial Airplanes, Attention: Contractual & Data Services (C&DS),
2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600;
telephone 562-797-1717; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
(4) You may view this material 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 material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a> or email <a href="/cdn-cgi/l/email-protection#385e4a1651564b485d5b4c5157567856594a59165f574e"><span class="__cf_email__" data-cfemail="a2c4d08ccbccd1d2c7c1d6cbcdcce2ccc3d0c38cc5cdd4">[email protected]</span></a>.
Issued on September 18, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2024-21689 Filed 9-25-24; 8:45 am]
BILLING CODE 4910-13-P
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