Airworthiness Directives; The Boeing Company Airplanes, 34656-34660 [2021-13932]
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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
any category, without a Boeing Sky Interior
(BSI).
(d) Subject
Air Transport Association (ATA) of
America Code 25, Equipment/furnishings.
(e) Unsafe Condition
This AD was prompted by reports of
passenger service units (PSUs) becoming
detached from the supporting airplane
structure in several Model 737 series
airplanes during survivable accidents. The
FAA is issuing this AD to address PSUs and
life vest panels detaching from the
supporting airplane structure, which could
lead to passenger injuries and impede
passenger and crew egress during evacuation.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Required Actions
Within 60 months after April 8, 2019 (the
effective date of AD 2019–03–26), do all
applicable actions identified as ‘‘RC’’
(required for compliance) in, and in
accordance with, the Accomplishment
Instructions of Boeing Special Attention
Service Bulletin 737–25–1707, Revision 2,
dated July 27, 2020.
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(h) Parts Installation Prohibition
As of the applicable time specified in
paragraph (h)(1) or (h)(2) of this AD, no
person may install on any airplane a PSU or
life vest panel, unless the lanyard assembly
has been modified (secondary retention
features added) or re-identified, as
applicable, as required by paragraph (g) of
this AD.
(1) For airplanes that have PSUs or life vest
panels without the secondary retention
features installed: After modification or reidentification, as applicable, of the airplane
as required by paragraph (g) of this AD.
(2) For airplanes that have PSUs or life vest
panels with the secondary retention features
installed: As of the effective date of this AD.
(i) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, Seattle 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 the attention of
the person identified in Related Information.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
(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, Seattle ACO Branch, FAA, to make
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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 2019–03–26
are approved as AMOCs for the
corresponding provisions of Boeing Special
Attention Service Bulletin 737–25–1707,
Revision 2, dated July 27, 2020, that are
required by paragraph (g) of this AD.
(j) Related Information
(1) For more information about this AD,
contact Tony Koung, Aerospace Engineer,
Cabin Safety and Environmental Systems
Section, FAA, Seattle ACO Branch, 2200
South 216th St., Des Moines, WA 98198;
phone and fax: 206–231–3985; email:
tony.koung@faa.gov.
(2) For service information 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; internet https://
www.myboeingfleet.com. You may view this
referenced 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.
Issued on June 14, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–13931 Filed 6–29–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2021–0457; Project
Identifier AD–2020–01461–T]
RIN 2120–AA64
Airworthiness Directives; The Boeing
Company Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
The FAA proposes to adopt a
new airworthiness directive (AD) for
certain The Boeing Company Model
787–8, 787–9, and 787–10 airplanes.
This proposed AD was prompted by a
report that during a fleet sampling
inspection, cracks were found on the
inner cylinder pivot pins of the left and
right main landing gear (MLG) on one of
the airplanes. This proposed AD would
require repetitive lubrications of the left
and right MLG truck beam and inner
cylinder pivot joint, reviewing the
SUMMARY:
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maintenance program documentation to
verify certain lubrication tasks are
incorporated, doing repetitive
inspections of the MLG inner cylinder
pivot pins and inner cylinder bushings
of the MLG truck beam and inner
cylinder joint for any friction, heat
damage, excessive wear, cracking and
smearing of bushing material, and
applicable on-condition actions. 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 August 16,
2021.
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
https://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: Deliver to Mail
address above between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
For service information identified in
this NPRM, 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;
internet https://
www.myboeingfleet.com. You may view
this referenced 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 https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0457.
ADDRESSES:
Examining the AD Docket
You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0457; 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.
FOR FURTHER INFORMATION CONTACT:
Allen Rauschendorfer, Senior Aerospace
Engineer, Airframe Section, FAA,
Seattle ACO Branch, 2200 South 216th
St., Des Moines, WA 98198; phone and
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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
fax: 206–231–3528; email:
allen.rauschendorfer@faa.gov.
SUPPLEMENTARY INFORMATION:
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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 ADDRESSES. Include ‘‘Docket No.
FAA–2021–0457; Project Identifier AD–
2020–01461–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 https://
www.regulations.gov, 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 Allen Rauschendorfer,
Senior Aerospace Engineer, Airframe
Section, FAA, Seattle ACO Branch, 2200
South 216th St., Des Moines, WA 98198;
phone and fax: 206–231–3528; email:
allen.rauschendorfer@faa.gov. Any
commentary that the FAA receives
which is not specifically designated as
CBI will be placed in the public docket
for this rulemaking.
Background
The FAA has received a report
indicating that during a fleet sampling
inspection, cracks were found on the
inner cylinder pivot pins of the left and
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right MLG on one of the airplanes. The
pins exhibited cracking of the high
velocity oxygen fuel (HVOF) tungsten
carbide-cobalt-chrome coating. Removal
of the outer diameter coating disclosed
cracking of the custom 465 CRES
substrate. The cause of the cracking was
determined to be heat damage due to inservice friction. This condition, if not
addressed, could result in a fractured
pivot pin, which could lead to loss of all
or part of the pivot pin assembly, and
subsequent collapse of the MLG and
reduced controllability of the airplane
during takeoff and landing.
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.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Boeing Alert
Requirements Bulletin B787–81205–
SB320045–00 RB, Issue 001, dated
November 9, 2020. This service
information specifies procedures for
repetitive lubrication of the left and
right MLG truck beam and inner
cylinder pivot joint with MIL–PRF–
32014 grease, reviewing the
maintenance program documentation to
verify that it includes lubrication tasks
for the left and right MLG truck beam
and inner cylinder pivot joint with
MIL–PRF–32014 grease, repetitive
detailed and fluorescent penetrant
inspections (FPI) of the left and right
MLG pivot pin outer diameter (OD)
surface for any friction and heat
damage, repetitive detailed inspections
of the left and right MLG inner cylinder
bushing inner diameter (ID) surface for
any excessive wear, cracking and
smearing of bushing material, and
applicable on-condition actions.
On-condition actions include
updating the maintenance program to
incorporate lubrication tasks for the left
and right MLG truck beam and inner
cylinder pivot joint with MIL–PRF–
32014 grease, detailed and FPI
inspections on the inner cylinder lug
bore for any heat and friction damage,
installing a new pivot pin, applying
lubrication using MIL–PRF–32014
grease and making sure lubrication
passages are clear, installing new
aluminum-nickel-bronze inner cylinder
bushings, installing new copper-nickeltin inner cylinder bushings, and repair.
The service information also specifies
terminating actions for the repetitive
inspections. The terminating actions
include the installation of certain parts
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34657
and incorporation of the lubrications
tasks into the maintenance program.
The FAA also reviewed Boeing 787
Certification Maintenance Requirements
(CMRs), D011Z009–03–03, dated June
2020. This service information specifies
procedures for, among other actions, for
CMR item number 32–CMR–01, to
lubricate the main landing gear truck
beam pivot joint.
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 ADDRESSES.
Proposed AD Requirements in This
NPRM
This proposed AD would require
accomplishing the actions specified in
the service information already
described except for any differences
identified as exceptions in the
regulatory text of this proposed AD. For
information on the procedures and
compliance times, see this service
information at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2021–
0457.
Boeing Alert Requirements Bulletin
B787–81205–SB320045–00 RB, Issue
001, dated November 9, 2020, specifies
updating the maintenance program to
incorporate lubrication tasks for the left
and right MLG truck beam and inner
cylinder pivot joint with MIL–PRF–
32014 grease. Operators have different
methods of updating the maintenance
program. If operators want to terminate
the repetitive lubrications required by
paragraph (g) of this AD, only revising
the maintenance or inspection program,
as applicable, to incorporate CMR item
number 32–CMR–01 of Section G,
‘‘Certification Maintenance Requirement
Task,’’ of Boeing 787 Certification
Maintenance Requirements (CMRs),
D011Z009–03–03, dated June 2020, is
terminating action.
This proposed AD includes an
optional action that would include
revisions to certain operator
maintenance documents to include new
actions (e.g., inspections). Compliance
with these actions is required by 14 CFR
91.403(c). For airplanes that have been
previously modified, altered, or repaired
in the areas addressed by this proposed
AD, the operator may not be able to
accomplish the actions described in the
revisions. In this situation, to comply
with 14 CFR 91.403(c), the operator
must request approval for an alternative
method of compliance according to
paragraph (l) of this proposed AD.
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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
Explanation of Requirements Bulletin
The FAA worked in conjunction with
industry, under the Airworthiness
Directive Implementation Aviation
Rulemaking Committee (AD ARC), to
enhance the AD system. One
enhancement is a process for annotating
which steps in the service information
are ‘‘required for compliance’’ (RC) with
an AD. Boeing has implemented this RC
concept into Boeing service bulletins.
In an effort to further improve the
quality of ADs and AD-related Boeing
service information, a joint process
improvement initiative was worked
between the FAA and Boeing. The
initiative resulted in the development of
a new process in which the service
information more clearly identifies the
actions needed to address the unsafe
condition in the ‘‘Accomplishment
Instructions.’’ The new process results
in a Boeing Requirements Bulletin,
which contains only the actions needed
to address the unsafe condition (i.e.,
only the RC actions).
Costs of Compliance
The FAA estimates that this AD, if
adopted as proposed, would affect 131
airplanes of U.S. registry. The FAA
estimates the following costs to comply
with this proposed AD:
ESTIMATED COSTS
Action
Labor cost
Repetitive lubrications ............
1 work-hour × $85 per hour =
$85 per lubrication cycle.
1 work-hour × $85 per hour =
$85.
40 work-hours × $85 per hour
= $3,400 per inspection
cycle.
Verification of lubrication
tasks.
Repetitive inspections ............
The FAA estimates the following
costs to do any necessary on-condition
actions that would be required based on
Cost per
product
Cost on U.S. operators
$0
$85 per lubrication cycle ........
$11,135 per lubrication cycle.
0
$85 .........................................
$11,135.
0
$3,400 per inspection cycle ...
$445,400 per inspection
cycle.
Parts cost
the results of the proposed inspection.
The agency has no way of determining
the number of aircraft that might need
these on-condition actions:
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ON-CONDITION COSTS
Cost per
product
Action
Labor cost
Parts cost
Installation of new pivot pin .....................
8 work-hours × $85 per hour = $680 ......
$98,197
Installation of new bushings ....................
Lubrication and making sure lubrication
passages are clear.
Detailed and FPI inspections on the
inner cylinder lug bore.
Update lubrication tasks (except for CMR
item number 32–CMR–01 incorporation).
1 work-hour × $85 per hour = $85 ..........
1 work-hour × $85 per hour = $85 ..........
$97,517 per pivot pin component assembly.
$5,968 per bushing .................................
$0 .............................................................
2 work-hour × $85 per hour = $170 ........
$0 .............................................................
170
1 work-hour × $85 per hour = $85 ..........
$0 .............................................................
85
The FAA has received no definitive
data on which to base the cost estimates
for the on-condition repairs specified in
this proposed AD.
For the optional action to revise the
maintenance or inspection program by
incorporating CMR item number 32–
CMR–01, as applicable, the FAA has
determined that revising the existing
maintenance or inspection program
takes an average of 90 work-hours per
operator, although the agency
recognizes that this number may vary
from operator to operator. In the past,
the FAA has estimated that this action
takes 1 work-hour per airplane. Since
operators incorporate maintenance or
inspection program changes for their
affected fleet(s), the FAA has
determined that a per-operator estimate
is more accurate than a per-airplane
estimate. Therefore, the FAA estimates
the average total cost per operator to be
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$7,650 (90 work-hours × $85 per workhour).
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
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85
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.
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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
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:
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.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive:
■
The Boeing Company: Docket No. FAA–
2021–0457; Project Identifier AD–2020–
01461–T.
(a) Comments Due Date
The FAA must receive comments on this
airworthiness directive (AD) by August 16,
2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company
Model 787–8, 787–9, and 787–10 airplanes,
certificated in any category, as identified in
Boeing Alert Requirements Bulletin B787–
81205–SB320045–00 RB, Issue 001, dated
November 9, 2020.
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(d) Subject
Air Transport Association (ATA) of
America Code 32, Main landing gear.
(e) Unsafe Condition
This AD was prompted by a report that
during a fleet sampling inspection, cracks
were found on the inner cylinder pivot pins
of the left and right main landing gear (MLG)
on one of the airplanes. The FAA is issuing
this AD to address any heat damage and
cracking to the MLG inner cylinder pivot pin,
which could result in a fractured pivot pin
and lead to loss of all or part of the pivot pin
assembly, and subsequent collapse of the
MLG and reduced controllability of the
airplane during takeoff and landing.
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(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Required Actions
Except as specified by paragraph (h) of this
AD: At the applicable times specified in the
‘‘Compliance’’ paragraph of Boeing Alert
Requirements Bulletin B787–81205–
SB320045–00 RB, Issue 001, dated November
9, 2020, do all applicable actions identified
in, and in accordance with, the
Accomplishment Instructions of Boeing Alert
Requirements Bulletin B787–81205–
SB320045–00 RB, Issue 001, dated November
9, 2020. Actions identified as terminating
action in Boeing Alert Requirements Bulletin
B787–81205–SB320045–00 RB, Issue 001,
dated November 9, 2020, terminate the
applicable required actions of this AD,
provided the terminating action is done in
accordance with the Accomplishment
Instructions of Boeing Alert Requirements
Bulletin B787–81205–SB320045–00 RB, Issue
001, dated November 9, 2020.
Note 1 to paragraph (g): Guidance for
accomplishing the actions required by this
AD can be found in Boeing Alert Service
Bulletin B787–81205–SB320045–00, Issue
001, dated November 9, 2020, which is
referred to in Boeing Alert Requirements
Bulletin B787–81205–SB320045–00 RB, Issue
001, dated November 9, 2020.
(h) Exceptions to Service Information
Specifications
(1) Where Boeing Alert Requirements
Bulletin B787–81205–SB320045–00 RB, Issue
001, dated November 9, 2020, uses the phrase
‘‘the Issue 001 date of Requirements Bulletin
B787–81205–SB320045–00 RB,’’ this AD
requires using ‘‘the effective date of this AD.’’
(2) Where Boeing Alert Requirements
Bulletin B787–81205–SB320045–00 RB, Issue
001, dated November 9, 2020, specifies
contacting Boeing for repair instructions:
This AD requires doing the repair using a
method approved in accordance with the
procedures specified in paragraph (l) of this
AD.
(3) Where the action for ‘‘CONDITION 2’’
in Table 7 of the ‘‘Compliance’’ paragraph of
Boeing Alert Requirements Bulletin B787–
81205–SB320045–00 RB, Issue 001, dated
November 9, 2020, specifies ‘‘Do a detailed
FPI inspection of the inner cylinder lug bore
for heat and friction damage,’’ for this AD,
the action is ‘‘Do a detailed and FPI
inspection on the inner cylinder lug bore for
heat and friction damage.’’
(i) Optional Terminating Action
Revising the existing maintenance or
inspection program, as applicable, to
incorporate the information in CMR item
number 32–CMR–01 of Section G,
‘‘Certification Maintenance Requirement
Task,’’ of Boeing 787 Certification
Maintenance Requirements (CMRs),
D011Z009–03–03, dated June 2020,
terminates the repetitive lubrications
required by paragraph (g) of this AD.
(j) No Alternative Actions and Intervals
After the existing maintenance or
inspection program has been revised as
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34659
required by paragraph (i) of this AD, no
alternative actions (e.g., inspections) and
intervals may be used unless the actions and
intervals are approved as an alternative
method of compliance (AMOC) in
accordance with the procedures specified in
paragraph (l) of this AD.
(k) Parts Installation Prohibition
At the applicable time specified in
paragraph (k)(1) or (2) of this AD, do not
install an aluminum-nickel-bronze inner
cylinder bushing on a MLG inner cylinder on
any airplane.
(1) For airplanes with aluminum-nickelbronze inner cylinder bushings installed on
a MLG inner cylinder as of the effective date
of this AD: After the bushing has been
replaced with a copper-nickel-tin inner
cylinder bushing.
(2) For airplanes with copper-nickel-tin
inner cylinder bushings installed on a MLG
inner cylinder as of the effective date of this
AD: As of the effective date of this AD.
(l) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, Seattle 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 the attention of
the person identified in Related Information.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
(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, Seattle ACO 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.
(m) Related Information
(1) For more information about this AD,
contact Allen Rauschendorfer, Senior
Aerospace Engineer, Airframe Section, FAA,
Seattle ACO Branch, 2200 South 216th St.,
Des Moines, WA 98198; phone and fax: 206–
231–3528; email: allen.rauschendorfer@
faa.gov.
(2) For service information 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; internet https://
www.myboeingfleet.com. You may view this
referenced 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.
E:\FR\FM\30JNP1.SGM
30JNP1
34660
Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules
Issued on June 6, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–13932 Filed 6–29–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2021–0503; Project
Identifier AD–2021–00163–T]
RIN 2120–AA64
Airworthiness Directives; The Boeing
Company Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
The FAA proposes to
supersede Airworthiness Directive (AD)
2005–05–18, which applies to certain
The Boeing Company Model 737–600,
–700, –700C, –800, and –900 series
airplanes. AD 2005–05–18 requires
repetitive inspections for cracking of the
webs of the aft pressure bulkhead at a
certain body station, and corrective
action if necessary. Since the FAA
issued AD 2005–05–18, cracking was
found in that inspection area on
airplanes not identified in the
applicability of AD 2005–05–18. This
proposed AD would retain the
requirements of AD 2005–05–18, revise
the applicability to include additional
airplanes, and add an inspection for
existing repairs on the newly added
airplanes. 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 August 16,
2021.
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
https://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: Deliver to Mail
address above between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
For service information identified in
this NPRM, contact Boeing Commercial
jbell on DSKJLSW7X2PROD with PROPOSALS
SUMMARY:
VerDate Sep<11>2014
16:55 Jun 29, 2021
Jkt 253001
Airplanes, Attention: Contractual & Data
Services (C&DS), 2600 Westminster
Blvd., MC 110–SK57, Seal Beach, CA
90740–5600; telephone 562–797–1717;
internet https://
www.myboeingfleet.com. 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 at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2021–
0503.
Examining the AD Docket
You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0503; 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.
FOR FURTHER INFORMATION CONTACT:
Wayne Lockett, Aerospace Engineer,
Airframe Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des
Moines, WA 98198; phone and fax: 206–
231–3524; email: wayne.lockett@
faa.gov.
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 ADDRESSES. Include ‘‘Docket No.
FAA–2021–0503; Project Identifier AD–
2021–00163–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 the 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 https://
www.regulations.gov, including any
personal information you provide. The
agency will also post a report
summarizing each substantive verbal
contact received about this proposed
AD.
Confidential Business Information
CBI is commercial or financial
information that is both customarily and
PO 00000
Frm 00024
Fmt 4702
Sfmt 4702
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 Wayne Lockett,
Aerospace Engineer, Airframe Section,
FAA, Seattle ACO Branch, 2200 South
216th St., Des Moines, WA 98198;
phone and fax: 206–231–3524; email:
wayne.lockett@faa.gov. Any
commentary that the FAA receives
which is not specifically designated as
CBI will be placed in the public docket
for this rulemaking.
Background
The FAA issued AD 2005–05–18,
Amendment 39–14007 (70 FR 12410,
March 14, 2005) (AD 2005–05–18), for
certain The Boeing Company Model
737–600, –700, –700C, –800, and –900
series airplanes. AD 2005–05–18 was
prompted by a report of cracks found,
during fatigue testing, at several of the
fastener rows in the web lap splices at
the dome apex of the aft pressure
bulkhead. AD 2005–05–18 requires
repetitive detailed, low frequency eddy
current (LFEC), and high frequency
eddy current (HFEC) inspections for
cracking of the webs of the aft pressure
bulkhead at body station (BS) 1016, and
corrective action if necessary. The FAA
issued AD 2005–05–18 to detect and
correct fatigue cracks in the webs of the
aft pressure bulkhead, which could
result in rapid decompression of the
airplane.
Actions Since AD 2005–05–18 Was
Issued
Since the FAA issued AD 2005–05–
18, cracking has been found at apex
webs on airplanes outside the
applicability of AD 2005–05–18, which
includes line numbers 1 through 1166
inclusive. Line numbers 1167 through
1755 inclusive, which are included in
this proposed AD, use a revised fastener
pattern in the 0.032-inch webs that was
intended to correct the cracking
addressed by AD 2005–05–18. During
the assembly process on line numbers
1167 through 1755, the fasteners in the
apex dome region are subjected to
E:\FR\FM\30JNP1.SGM
30JNP1
]]>Agencies
[Federal Register Volume 86, Number 123 (Wednesday, June 30, 2021)]
[Proposed Rules]
[Pages 34656-34660]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-13932]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0457; Project Identifier AD-2020-01461-T]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain The Boeing Company Model 787-8, 787-9, and 787-10
airplanes. This proposed AD was prompted by a report that during a
fleet sampling inspection, cracks were found on the inner cylinder
pivot pins of the left and right main landing gear (MLG) on one of the
airplanes. This proposed AD would require repetitive lubrications of
the left and right MLG truck beam and inner cylinder pivot joint,
reviewing the maintenance program documentation to verify certain
lubrication tasks are incorporated, doing repetitive inspections of the
MLG inner cylinder pivot pins and inner cylinder bushings of the MLG
truck beam and inner cylinder joint for any friction, heat damage,
excessive wear, cracking and smearing of bushing material, and
applicable on-condition actions. 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 August 16,
2021.
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 https://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: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, 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; internet https://www.myboeingfleet.com. You may
view this referenced 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 https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0457.
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0457; 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.
FOR FURTHER INFORMATION CONTACT: Allen Rauschendorfer, Senior Aerospace
Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th
St., Des Moines, WA 98198; phone and
[[Page 34657]]
fax: 206-231-3528; email: [email protected].
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 ADDRESSES. Include ``Docket No. FAA-2021-0457; Project Identifier
AD-2020-01461-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
https://www.regulations.gov, 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 Allen
Rauschendorfer, Senior Aerospace Engineer, Airframe Section, FAA,
Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone
and fax: 206-231-3528; email: [email protected]. Any
commentary that the FAA receives which is not specifically designated
as CBI will be placed in the public docket for this rulemaking.
Background
The FAA has received a report indicating that during a fleet
sampling inspection, cracks were found on the inner cylinder pivot pins
of the left and right MLG on one of the airplanes. The pins exhibited
cracking of the high velocity oxygen fuel (HVOF) tungsten carbide-
cobalt-chrome coating. Removal of the outer diameter coating disclosed
cracking of the custom 465 CRES substrate. The cause of the cracking
was determined to be heat damage due to in-service friction. This
condition, if not addressed, could result in a fractured pivot pin,
which could lead to loss of all or part of the pivot pin assembly, and
subsequent collapse of the MLG and reduced controllability of the
airplane during takeoff and landing.
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.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin B787-81205-
SB320045-00 RB, Issue 001, dated November 9, 2020. This service
information specifies procedures for repetitive lubrication of the left
and right MLG truck beam and inner cylinder pivot joint with MIL-PRF-
32014 grease, reviewing the maintenance program documentation to verify
that it includes lubrication tasks for the left and right MLG truck
beam and inner cylinder pivot joint with MIL-PRF-32014 grease,
repetitive detailed and fluorescent penetrant inspections (FPI) of the
left and right MLG pivot pin outer diameter (OD) surface for any
friction and heat damage, repetitive detailed inspections of the left
and right MLG inner cylinder bushing inner diameter (ID) surface for
any excessive wear, cracking and smearing of bushing material, and
applicable on-condition actions.
On-condition actions include updating the maintenance program to
incorporate lubrication tasks for the left and right MLG truck beam and
inner cylinder pivot joint with MIL-PRF-32014 grease, detailed and FPI
inspections on the inner cylinder lug bore for any heat and friction
damage, installing a new pivot pin, applying lubrication using MIL-PRF-
32014 grease and making sure lubrication passages are clear, installing
new aluminum-nickel-bronze inner cylinder bushings, installing new
copper-nickel-tin inner cylinder bushings, and repair.
The service information also specifies terminating actions for the
repetitive inspections. The terminating actions include the
installation of certain parts and incorporation of the lubrications
tasks into the maintenance program.
The FAA also reviewed Boeing 787 Certification Maintenance
Requirements (CMRs), D011Z009-03-03, dated June 2020. This service
information specifies procedures for, among other actions, for CMR item
number 32-CMR-01, to lubricate the main landing gear truck beam pivot
joint.
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 ADDRESSES.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified
in the service information already described except for any differences
identified as exceptions in the regulatory text of this proposed AD.
For information on the procedures and compliance times, see this
service information at https://www.regulations.gov by searching for and
locating Docket No. FAA-2021-0457.
Boeing Alert Requirements Bulletin B787-81205-SB320045-00 RB, Issue
001, dated November 9, 2020, specifies updating the maintenance program
to incorporate lubrication tasks for the left and right MLG truck beam
and inner cylinder pivot joint with MIL-PRF-32014 grease. Operators
have different methods of updating the maintenance program. If
operators want to terminate the repetitive lubrications required by
paragraph (g) of this AD, only revising the maintenance or inspection
program, as applicable, to incorporate CMR item number 32-CMR-01 of
Section G, ``Certification Maintenance Requirement Task,'' of Boeing
787 Certification Maintenance Requirements (CMRs), D011Z009-03-03,
dated June 2020, is terminating action.
This proposed AD includes an optional action that would include
revisions to certain operator maintenance documents to include new
actions (e.g., inspections). Compliance with these actions is required
by 14 CFR 91.403(c). For airplanes that have been previously modified,
altered, or repaired in the areas addressed by this proposed AD, the
operator may not be able to accomplish the actions described in the
revisions. In this situation, to comply with 14 CFR 91.403(c), the
operator must request approval for an alternative method of compliance
according to paragraph (l) of this proposed AD.
[[Page 34658]]
Explanation of Requirements Bulletin
The FAA worked in conjunction with industry, under the
Airworthiness Directive Implementation Aviation Rulemaking Committee
(AD ARC), to enhance the AD system. One enhancement is a process for
annotating which steps in the service information are ``required for
compliance'' (RC) with an AD. Boeing has implemented this RC concept
into Boeing service bulletins.
In an effort to further improve the quality of ADs and AD-related
Boeing service information, a joint process improvement initiative was
worked between the FAA and Boeing. The initiative resulted in the
development of a new process in which the service information more
clearly identifies the actions needed to address the unsafe condition
in the ``Accomplishment Instructions.'' The new process results in a
Boeing Requirements Bulletin, which contains only the actions needed to
address the unsafe condition (i.e., only the RC actions).
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 131 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Repetitive lubrications.......... 1 work-hour x $85 $0 $85 per lubrication $11,135 per
per hour = $85 per cycle. lubrication cycle.
lubrication cycle.
Verification of lubrication tasks 1 work-hour x $85 0 $85................ $11,135.
per hour = $85.
Repetitive inspections........... 40 work-hours x $85 0 $3,400 per $445,400 per
per hour = $3,400 inspection cycle. inspection cycle.
per inspection
cycle.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of the
proposed inspection. The agency has no way of determining the number of
aircraft that might need these on-condition actions:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Installation of new pivot pin........... 8 work-hours x $85 per $97,517 per pivot pin $98,197
hour = $680. component assembly.
Installation of new bushings............ 1 work-hour x $85 per hour $5,968 per bushing........ 6,053
= $85.
Lubrication and making sure lubrication 1 work-hour x $85 per hour $0........................ 85
passages are clear. = $85.
Detailed and FPI inspections on the 2 work-hour x $85 per hour $0........................ 170
inner cylinder lug bore. = $170.
Update lubrication tasks (except for CMR 1 work-hour x $85 per hour $0........................ 85
item number 32-CMR-01 incorporation). = $85.
----------------------------------------------------------------------------------------------------------------
The FAA has received no definitive data on which to base the cost
estimates for the on-condition repairs specified in this proposed AD.
For the optional action to revise the maintenance or inspection
program by incorporating CMR item number 32-CMR-01, as applicable, the
FAA has determined that revising the existing maintenance or inspection
program takes an average of 90 work-hours per operator, although the
agency recognizes that this number may vary from operator to operator.
In the past, the FAA has estimated that this action takes 1 work-hour
per airplane. Since operators incorporate maintenance or inspection
program changes for their affected fleet(s), the FAA has determined
that a per-operator estimate is more accurate than a per-airplane
estimate. Therefore, the FAA estimates the average total cost per
operator to be $7,650 (90 work-hours x $85 per work-hour).
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.
[[Page 34659]]
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:
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:
The Boeing Company: Docket No. FAA-2021-0457; Project Identifier AD-
2020-01461-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by August 16, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 787-8, 787-9, and
787-10 airplanes, certificated in any category, as identified in
Boeing Alert Requirements Bulletin B787-81205-SB320045-00 RB, Issue
001, dated November 9, 2020.
(d) Subject
Air Transport Association (ATA) of America Code 32, Main landing
gear.
(e) Unsafe Condition
This AD was prompted by a report that during a fleet sampling
inspection, cracks were found on the inner cylinder pivot pins of
the left and right main landing gear (MLG) on one of the airplanes.
The FAA is issuing this AD to address any heat damage and cracking
to the MLG inner cylinder pivot pin, which could result in a
fractured pivot pin and lead to loss of all or part of the pivot pin
assembly, and subsequent collapse of the MLG and reduced
controllability of the airplane during takeoff and landing.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Except as specified by paragraph (h) of this AD: At the
applicable times specified in the ``Compliance'' paragraph of Boeing
Alert Requirements Bulletin B787-81205-SB320045-00 RB, Issue 001,
dated November 9, 2020, do all applicable actions identified in, and
in accordance with, the Accomplishment Instructions of Boeing Alert
Requirements Bulletin B787-81205-SB320045-00 RB, Issue 001, dated
November 9, 2020. Actions identified as terminating action in Boeing
Alert Requirements Bulletin B787-81205-SB320045-00 RB, Issue 001,
dated November 9, 2020, terminate the applicable required actions of
this AD, provided the terminating action is done in accordance with
the Accomplishment Instructions of Boeing Alert Requirements
Bulletin B787-81205-SB320045-00 RB, Issue 001, dated November 9,
2020.
Note 1 to paragraph (g): Guidance for accomplishing the actions
required by this AD can be found in Boeing Alert Service Bulletin
B787-81205-SB320045-00, Issue 001, dated November 9, 2020, which is
referred to in Boeing Alert Requirements Bulletin B787-81205-
SB320045-00 RB, Issue 001, dated November 9, 2020.
(h) Exceptions to Service Information Specifications
(1) Where Boeing Alert Requirements Bulletin B787-81205-
SB320045-00 RB, Issue 001, dated November 9, 2020, uses the phrase
``the Issue 001 date of Requirements Bulletin B787-81205-SB320045-00
RB,'' this AD requires using ``the effective date of this AD.''
(2) Where Boeing Alert Requirements Bulletin B787-81205-
SB320045-00 RB, Issue 001, dated November 9, 2020, specifies
contacting Boeing for repair instructions: This AD requires doing
the repair using a method approved in accordance with the procedures
specified in paragraph (l) of this AD.
(3) Where the action for ``CONDITION 2'' in Table 7 of the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin B787-
81205-SB320045-00 RB, Issue 001, dated November 9, 2020, specifies
``Do a detailed FPI inspection of the inner cylinder lug bore for
heat and friction damage,'' for this AD, the action is ``Do a
detailed and FPI inspection on the inner cylinder lug bore for heat
and friction damage.''
(i) Optional Terminating Action
Revising the existing maintenance or inspection program, as
applicable, to incorporate the information in CMR item number 32-
CMR-01 of Section G, ``Certification Maintenance Requirement Task,''
of Boeing 787 Certification Maintenance Requirements (CMRs),
D011Z009-03-03, dated June 2020, terminates the repetitive
lubrications required by paragraph (g) of this AD.
(j) No Alternative Actions and Intervals
After the existing maintenance or inspection program has been
revised as required by paragraph (i) of this AD, no alternative
actions (e.g., inspections) and intervals may be used unless the
actions and intervals are approved as an alternative method of
compliance (AMOC) in accordance with the procedures specified in
paragraph (l) of this AD.
(k) Parts Installation Prohibition
At the applicable time specified in paragraph (k)(1) or (2) of
this AD, do not install an aluminum-nickel-bronze inner cylinder
bushing on a MLG inner cylinder on any airplane.
(1) For airplanes with aluminum-nickel-bronze inner cylinder
bushings installed on a MLG inner cylinder as of the effective date
of this AD: After the bushing has been replaced with a copper-
nickel-tin inner cylinder bushing.
(2) For airplanes with copper-nickel-tin inner cylinder bushings
installed on a MLG inner cylinder as of the effective date of this
AD: As of the effective date of this AD.
(l) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle 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 the attention of the person
identified in Related Information. Information may be emailed to: [email protected].
(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, Seattle
ACO 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.
(m) Related Information
(1) For more information about this AD, contact Allen
Rauschendorfer, Senior Aerospace Engineer, Airframe Section, FAA,
Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198;
phone and fax: 206-231-3528; email: [email protected].
(2) For service information 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; internet https://www.myboeingfleet.com. You may view this referenced 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.
[[Page 34660]]
Issued on June 6, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-13932 Filed 6-29-21; 8:45 am]
BILLING CODE 4910-13-P
