[Federal Register Volume 83, Number 150 (Friday, August 3, 2018)]
[Proposed Rules]
[Pages 38096-38098]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-16575]


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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]
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: We propose to adopt a new airworthiness directive (AD) for all 
The Boeing Company Model 747-8 and 747-8F series airplanes. This 
proposed 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 proposed AD would require installing new 
aft fairing vapor seals, heatshield seals, heatshield seal retainers, 
block seals and outboard lateral restraint access panels. We are 
proposing this AD to address the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by September 17, 
2018.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: 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, 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 the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this NPRM, the regulatory evaluation, any comments received, 
and other information. The street address for the Docket Office (phone: 
800-647-5527) is in the ADDRESSES section. Comments will be available 
in the AD docket shortly after receipt.

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: 
[email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite 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-2018-0703; 
Product Identifier 2018-NM-007-AD'' at the beginning of your comments. 
We specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this NPRM. We will consider all 
comments received by the closing date and may amend this NPRM because 
of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    We have received reports of damaged vapor seals, block seals, and 
heat shield seals on the outboard pylons between the engine strut and 
aft fairing. Such damage could allow flammable fluid leakage out of the 
aft fairing. This condition, if not addressed, could result in an 
uncontrolled fire in the engine strut.

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.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would require accomplishment of the actions 
identified as ``RC'' (required for compliance) in the Accomplishment 
Instructions of Boeing Alert Service Bulletin 747-54A2247, dated August 
3, 2017, described previously, except as discussed under ``Differences 
Between this Proposed AD and the Service Information,'' and 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 http://www.regulations.gov by searching for and 
locating Docket No. FAA-2018-0703.

Differences Between This Proposed AD and the Service Information

    The applicability in this proposed AD does not refer to paragraph 
1.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

[[Page 38097]]

this proposed AD is all Model 747-8 and 747-8F series airplanes. We 
have coordinated this difference with Boeing.

Costs of Compliance

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

                                      Estimated Costs for Required Actions
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                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
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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 
proposed AD may be covered under warranty, thereby reducing the cost 
impact on affected individuals. We do not control warranty coverage for 
affected individuals. As a result, we have included all 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 proposed 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 to the Director of the System Oversight 
Division.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13   [Amended]

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

The Boeing Company: Docket No. FAA-2018-0703; Product Identifier 
2018-NM-007-AD.

(a) Comments Due Date

    We must receive comments by September 17, 2018.

(b) Affected ADs

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

(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 
paragraph (j) of this AD is installed. If any part number specified 
in paragraph (j) 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.

(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,''

[[Page 38098]]

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

    As of the effective date of this AD, do not install an access 
panel lateral restraint with part numbers (P/Ns) 321U8595-1, 
321U8595-2, 321U8595-3 and 321U8595-4; a vapor seal with P/N 
323U8452-3; 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.

 (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)(1) of this AD. 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 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

    (1) For more information about this AD, contact Christopher 
Baker, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO 
Branch, 2200 South 216th Street, Des Moines, WA 98198; phone and 
fax: 206-231-3552; 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, 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.


    Issued in Des Moines, Washington, on July 25, 2018.
James Cashdollar,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-16575 Filed 8-2-18; 8:45 am]
 BILLING CODE 4910-13-P


