Document ID: FAA-2018-0703-0006
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: The Boeing Company Airplanes
Posted Date: 2019-05-09T04:00Z

[Federal Register Volume 84, Number 90 (Thursday, May 9, 2019)]
[Rules and Regulations]
[Pages 20242-20245]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-09521]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0703; Product Identifier 2018-NM-007-AD; Amendment 
39-19630; AD 2019-08-09]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for all The 
Boeing Company Model 747-8 and 747-8F series airplanes. This AD was 
prompted by reports of damaged vapor seals, block seals, and heat 
shield seals on the outboard pylons between the engine strut and aft 
fairing. This AD requires installing new aft fairing vapor seals, 
heatshield seals, heatshield seal retainers, block seals, and outboard 
lateral restraint access panels. We are issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective June 13, 2019.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of June 13, 
2019.

ADDRESSES: For service information identified in this final rule, 
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 service information at the 
FAA, Transport Standards 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 http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0703.

Examining the AD Docket

    You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0703; 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, the regulatory evaluation, any comments received, and 
other information. The address for Docket Operations (phone: 800-647-
5527) 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: Christopher Baker, Aerospace Engineer, 
Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des 
Moines, WA 98198; phone and fax: 206-231-3552; email: 
Christopher.R.Baker@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 by adding an AD that would apply to all The Boeing Company 
Model 747-8 and 747-8F series airplanes. The NPRM published in the 
Federal Register on August 3, 2018 (83 FR 38096). The NPRM was prompted 
by reports of damaged vapor seals, block seals, and heat shield seals 
on the outboard pylons between the engine strut and aft fairing. The 
NPRM proposed to require installing new aft fairing vapor seals, 
heatshield seals, heatshield seal retainers, block seals, and outboard 
lateral restraint access panels.
    We are issuing this AD to address heat damage to the vapor seals 
between the engine strut and aft fairing. Such damage could allow 
flammable fluid leakage out of the aft fairing, which could result in 
an uncontrolled fire in the engine strut.

Comments

    We gave the public the opportunity to participate in developing 
this final rule. The following presents the comments received on the 
NPRM and the FAA's response to each comment.

Request To Review Airplane Maintenance Records in Lieu of an Inspection

    United Parcel Service (UPS) requested that operators be allowed to 
perform a records review to determine if the affected part number is 
installed in lieu of performing an inspection. UPS stated that the 
records review will provide an equivalent level of safety. UPS stated 
that in accordance with paragraph (g)(2) of the proposed AD, it would 
be required to inspect all Model 747-8F airplanes within 4 years or 
4,800 flight cycles after the AD effective date, whichever occurs 
first.
    We agree with the commenter's request that a review of the airplane 
maintenance records is acceptable in lieu of an inspection if the part 
number of the part can be conclusively determined from that review. We 
have revised paragraph (g)(2) of this AD accordingly.

Request To Revise the Line Numbers in the Applicability Paragraph

    Boeing requested we revise the proposed AD to address airplanes 
only specified in Boeing Alert Service Bulletin 747-54A2247, dated 
August 3, 2017, line numbers (L/Ns) 1420 through 1540, instead of all 
747-8 and 747-8F series airplanes as specified in paragraph (c), 
``Applicability,'' of the proposed AD.
    Boeing stated that airplanes not identified in Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017, L/Ns 1541 and on, were 
built and delivered from the Boeing factory with the correct parts. 
Boeing commented that the factory utilizes the approved Boeing 
Production System to maintain configuration control of the airplanes 
through delivery, and that the remainder of the Model 747-8 fleet is 
covered by Boeing Alert Service Bulletin 747-54A2247, dated August 3, 
2017.
    We disagree with the commenter's request. As we stated in the 
``Differences Between this Proposed AD and the Service Information'' of 
the NPRM, the applicability in this AD does not refer to paragraph l. 
A., ``Effectivity,'' of Boeing Alert Service Bulletin 747-54A2247, 
dated August 3, 2017. The service information does not contain a 
comprehensive list of the airplanes affected by the identified unsafe 
condition because the spare parts identified in paragraph (j) of this 
AD have been determined to be rotable parts that are capable of being 
installed on all Model 747-8 and 747-8F series airplanes. Therefore, 
the applicability of this AD is all Model 747-8 and 747-8F series 
airplanes.
    Additionally, there is the potential for previously delivered Model 
747-8 and 747-8F airplanes having the affected spare parts installed 
during a repair of the aft fairing. Delivered airplanes with line 
numbers 1541 and on could have been exposed to the affected parts 
between delivery and as of the effective

[[Page 20243]]

date of this AD, which is why operators can either review airplane 
maintenance records to confirm whether the subject parts are not 
installed, or perform an inspection of the parts on the airplanes.
    We have been informed by operators that the practice of rotating 
interchangeable parts among airplanes is widespread and even a key part 
of their operations. In the absence of an AD or airworthiness 
limitation (AWL) that restricts the installation of the affected parts, 
we cannot be assured that the unsafe condition will not be introduced 
to Model 747-8 and 747-8F airplanes that are not identified in Boeing 
Alert Service Bulletin 747-54A2247, dated August 3, 2017. In addition, 
we cannot rely solely on the Boeing Production System to maintain 
configuration control of these airplanes until the AD has been 
published. In order to eliminate the unsafe condition, we must address 
all of the potentially exposed airplanes. We have not changed this AD 
in this regard.

Request To Remove the Parts Installation Prohibition Paragraph

    Boeing requested that we remove the ``Parts Installation 
Prohibition'' paragraph in the proposed AD. Boeing stated that some of 
the parts listed in paragraph (j), ``Parts Installation Prohibition,'' 
remain in use on all Model 747-8 airplanes and therefore cannot be 
prohibited.
    Boeing also commented that, regarding the seals, rotation of these 
parts from one airplane to another is not feasible due to their 
location and the effort required, as the aft fairings must be removed 
and reinstalled to gain access to the seals. In addition, Boeing stated 
that the lateral restraint access panels were revised to include an 
integral air scoop on one side, and if a panel is inadvertently 
installed in an incorrect location, the seal system would still operate 
with an acceptable level of safety.
    We partially agree with the commenter's request. We agree the vapor 
seal-outboard aft fairing, part number (P/N) 323U8452-3, is a part that 
could be used as a part of the service information modification. 
Therefore, we have revised the ``Parts Installation Prohibition/
Limitation'' paragraph in this AD to specify that no person may install 
a vapor seal with P/N 323U8452-3, on any airplane, unless it is a new 
vapor seal that has been installed as specified in the Accomplishment 
Instructions of Boeing Alert Service Bulletin 747-54A2247, dated August 
3, 2017.
    We disagree with removing any other part numbers as they are 
subject to the heat damage that leads to the unsafe condition. However, 
we have revised the compliance time specified in paragraph (j) of this 
AD by removing ``as of the effective date of this AD'' and replacing it 
with either ``as of the determination that no affected part is 
installed'' or ``after accomplishing the required actions specified in 
paragraph (g) of this AD'', depending on whether the actions in the 
service information specified in paragraph (g) of this AD must be done.
    In addition, for clarity, we revised paragraph (g)(2) of this AD by 
listing the affected part numbers instead of referring to paragraph (j) 
of this AD for the part numbers.

Request To Clarify the Requirements of the Parts Installation 
Prohibition Paragraph

    Cathay Pacific Airways Limited (Cathay) requested clarification of 
the requirements in the ``Parts Installation Prohibition'' paragraph of 
the proposed AD. Cathay stated that the paragraph should only be 
applicable to airplanes that have been modified in accordance with 
Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017, 
instead of being applicable to any airplane modified as of the 
effective date of the AD. Cathay stated that if the intention is indeed 
for any airplane, then it asked the FAA to clarify the following:
     Whether the intent of the proposed AD is to fulfill this 
paragraph requirement as of the compliance time of the proposed AD 
instead of as of the effective date of this proposed AD;
     Whether this paragraph affects the already installed parts 
or only the new parts to be installed in accordance with Boeing Alert 
Service Bulletin 747-54A2247, dated August 3, 2017. Cathay stated that 
on the effective date of the proposed AD, some of the airplanes are 
still in pre-mod configuration and are installing the pre-mod parts;
     Whether after the effective date of the proposed AD, do 
operators need to accomplish Boeing Alert Service Bulletin 747-54A2247, 
dated August 3, 2017, immediately and install the post-modification 
parts if the related parts are found damaged at line maintenance as a 
non-routine findings; and
     Whether after the effective date of the proposed AD, do 
operators need to accomplish Boeing Alert Service Bulletin 747-54A2247, 
dated August 3, 2017, immediately and install the post-modification 
parts if the related parts are found damaged during the Boeing Alert 
Service Bulletin 747-54A2246, dated February 5, 2016, inspections.
    We agree to provide clarification for the commenter. Paragraph 
(g)(1) of this AD requires operators to complete the requirements in 
accordance with the Accomplishment Instructions of Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017, within 4 years or 4,800 
flight cycles after the effective date of this AD. Paragraph (g)(2) of 
this AD requires operators to determine if any affected part is 
installed and if so, to complete the applicable replacement in 
accordance with the Accomplishment Instructions of Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017, within 4 years or 4,800 
flight cycles after the effective date of this AD.
    Within that time period, operators of airplanes that have any 
affected parts may use the existing/pre-modification parts that are 
subject to the repetitive inspections of AD 2017-04-13, Amendment 39-
18808 (82 FR 11795, February 27, 2017) (``AD 2017-04-13''). If it is 
discovered during line maintenance that the subject parts are damaged, 
the operator has the option to replace the parts that are damaged using 
either Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017, 
or Boeing Alert Service Bulletin 747-54A2246, dated February 5, 2016. 
Thus, operators are able to continue to conduct the repetitive 
inspections as well as accomplish the repairs using Boeing Alert 
Service Bulletin 747-54A2246, dated February 5, 2016, while using the 
older parts, for up to 4 years or 4,800 flight cycles from the 
effective date of this AD.
    However, operators are required to accomplish Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017, within the same compliance 
time specified in this AD. The FAA encourages operators to install the 
newer parts to eliminate the unsafe condition and terminate the 
inspections required by AD 2017-04-13.
    For airplanes that do not have any affected parts, we have 
determined that in order to address the unsafe condition, we cannot 
allow that condition to be introduced into additional airplanes in the 
fleet. Therefore, paragraph (j)(1) of this AD is applicable to those 
airplanes and the prohibition and limitation specified in paragraphs 
(j)(1)(i) and (j)(1)(ii) of this AD must be complied with as of the 
determination that no affected part is installed.
    Paragraph (j)(2) of this AD is only applicable to the airplanes 
that have incorporated the actions specified in Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017. Once an operator 
incorporates the new parts in accordance with the Accomplishment 
Instructions of Boeing Alert Service Bulletin 747-54A2247, dated August 
3, 2017, operators must comply with the

[[Page 20244]]

prohibition and limitation specified in paragraphs (j)(2)(i) and 
(j)(2)(ii) of this AD.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this final rule with the changes described previously and minor 
editorial changes. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this final 
rule.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Alert Service Bulletin 747-54A2247, dated August 
3, 2017. This service information describes procedures for installing 
new aft fairing vapor seals, heatshield seals, heatshield seal 
retainers, block seals, and outboard lateral restraint access panels. 
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

    We estimate that this AD affects 13 airplanes of U.S. registry. We 
estimate the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Installation of vapor seals,            136 work-hours x $85 per         $21,910         $33,470        $435,110
 heatshield seals, heatshield seal       hour = $11,560.
 retainers, block seals, and outboard
 lateral restraint access panels.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, some or all of the costs of this AD 
may be covered under warranty, thereby reducing the cost impact on 
affected individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all available costs in our 
cost estimate.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to transport category airplanes and 
associated appliances to the Director of the System Oversight Division.

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) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2019-08-09 The Boeing Company: Amendment 39-19630; Docket No. FAA-
2018-0703; Product Identifier 2018-NM-007-AD.

(a) Effective Date

    This AD is effective June 13, 2019.

(b) Affected ADs

    This AD affects AD 2017-04-13, Amendment 39-18808 (82 FR 11795, 
February 27, 2017) (``AD 2017-04-13'').

(c) Applicability

    This AD applies to all The Boeing Company Model 747-8 and 747-8F 
series airplanes, certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.

(e) Unsafe Condition

    This AD was prompted by reports of damaged vapor seals, block 
seals, and heat shield seals on the outboard pylons between the 
engine strut and aft fairing. We are issuing this AD to address heat 
damage to the vapor seals between the engine strut and aft fairing. 
Such damage could allow flammable fluid leakage out of the aft 
fairing, which could result in an uncontrolled fire in the engine 
strut.

[[Page 20245]]

(f) Compliance

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

(g) Required Actions

    (1) For airplanes identified in Boeing Alert Service Bulletin 
747-54A2247, dated August 3, 2017: Except as required by paragraph 
(h) of this AD, at the applicable times specified in paragraph 1.E., 
``Compliance,'' of Boeing Alert Service Bulletin 747-54A2247, dated 
August 3, 2017, do all applicable actions identified as ``RC'' 
(required for compliance) in, and in accordance with, the 
Accomplishment Instructions of Boeing Alert Service Bulletin 747-
54A2247, dated August 3, 2017.
    (2) For airplanes not identified in Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017: Within 4 years or 4,800 
flight cycles after the effective date of this AD, whichever occurs 
first, inspect to determine if any part number identified in 
paragraphs (g)(2)(i) through (g)(2)(v) of this AD is installed. If 
any part number specified in paragraphs (g)(2)(i) through (g)(2)(v) 
of this AD is installed, within 4 years or 4,800 flight cycles after 
the effective date of this AD, whichever occurs first, replace the 
part with a part number that is identified as an acceptable 
replacement in Boeing Alert Service Bulletin 747-54A2247, dated 
August 3, 2017. A review of airplane maintenance records is 
acceptable in lieu of this inspection if the part numbers specified 
in paragraphs (g)(2)(i) through (g)(2)(v) of this AD can be 
conclusively determined from that review.
    (i) An access panel lateral restraint with part number (P/N) 
321U8595-1, 321U8595-2, 321U8595-3, or 321U8595-4.
    (ii) A block seal with P/N 323U8452-2.
    (iii) A vapor seal with P/N 323U8452-3.
    (iv) A heatshield seal with P/N 323U8852-1.
    (v) A heatshield seal retainer P/N 323U8852-2.

(h) Exceptions to Service Information Specifications

    For purposes of determining compliance with the requirements of 
this AD: Where Boeing Alert Service Bulletin 747-54A2247, dated 
August 3, 2017, uses the phrase ``the original issue date of this 
service bulletin,'' this AD requires using ``the effective date of 
this AD.''

(i) Terminating Action for Repetitive Inspections

    Accomplishing the actions specified in paragraphs (g)(1) or 
(g)(2) of this AD, as applicable, terminates all requirements of AD 
2017-04-13.

(j) Parts Installation Prohibition/Limitation

    (1) For airplanes identified in paragraph (g)(2) of this AD on 
which no part specified in paragraphs (g)(2)(i) through (g)(2)(v) of 
this AD is found installed: As of the determination that no part 
specified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD is 
installed, comply with the prohibition and limitation specified in 
paragraphs (j)(1)(i) and (j)(1)(ii) of this AD.
    (i) Do not install an access panel lateral restraint with part 
numbers (P/Ns) 321U8595-1, 321U8595-2, 321U8595-3 and 321U8595-4; a 
block seal with P/N 323U8452-2; a heatshield seal with P/N 323U8852-
1; and a heatshield seal retainer P/N 323U8852-2; on any airplane.
    (ii) Do not install a vapor seal with P/N 323U8452-3, on any 
airplane, unless it is a new vapor seal that is installed as 
specified in the Accomplishment Instructions Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017.
    (2) For airplanes other than those identified in paragraph 
(j)(1) of this AD: After accomplishing the required actions 
specified in paragraph (g) of this AD, comply with the prohibition 
and limitation specified in paragraphs (j)(2)(i) and (j)(2)(ii) of 
this AD:
    (i) Do not install an access panel lateral restraint with P/Ns 
321U8595-1, 321U8595-2, 321U8595-3, and 321U8595-4; a block seal 
with P/N 323U8452-2; a heatshield seal with P/N 323U8852-1; and a 
heatshield seal retainer P/N 323U8852-2; on any airplane.
    (ii) Do not install a vapor seal with P/N 323U8452-3, on any 
airplane, unless it is a new vapor seal that is installed as 
specified in the Accomplishment Instructions of Boeing Alert Service 
Bulletin 747-54A2247, dated August 3, 2017.

(k) 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 local Flight Standards District 
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 (l) of this AD. Information may be 
emailed to: 9-ANM-Seattle-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 local flight standards district office/certificate holding 
district 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 Commercial Airplanes 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.
    (4) Except as required by paragraph (h) of this AD: For service 
information that contains steps that are labeled as RC, the 
provisions of paragraphs (k)(4)(i) and (k)(4)(ii) of this AD apply.
    (i) The steps labeled as RC, including substeps under an RC step 
and any figures identified in an RC step, must be done to comply 
with the AD. If a step or substep is labeled ``RC Exempt,'' then the 
RC requirement is removed from that step or substep. An AMOC is 
required for any deviations to RC steps, including substeps and 
identified figures.
    (ii) Steps not labeled as RC may be deviated from using accepted 
methods in accordance with the operator's maintenance or inspection 
program without obtaining approval of an AMOC, provided the RC 
steps, including substeps and identified figures, can still be done 
as specified, and the airplane can be put back in an airworthy 
condition.

(l) Related Information

    For more information about this AD, contact Christopher Baker, 
Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch, 
2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231-
3552; email: Christopher.R.Baker@faa.gov.

 (m) 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 the AD specifies otherwise.
    (i) Boeing Alert Service Bulletin 747-54A2247, dated August 3, 
2017.
    (ii) [Reserved]
    (3) 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.
    (4) You may view this service information at the FAA, Transport 
Standards 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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Des Moines, Washington, on April 25, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2019-09521 Filed 5-8-19; 8:45 am]
 BILLING CODE 4910-13-P