[Federal Register Volume 84, Number 190 (Tuesday, October 1, 2019)]
[Proposed Rules]
[Pages 52047-52049]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-21187]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2019-0705; Product Identifier 2019-NM-098-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: The FAA proposes to adopt a new airworthiness directive (AD)
for certain The Boeing Company Model 737-600, -700, -700C, -800, and -
900 series airplanes. This proposed AD was prompted by reports of
cracks in the bear strap between certain stations, sometimes common to
fasteners in the gap cover and emanating from rough sanding marks found
on the surface of the bear strap. This proposed AD would require
inspections of the fuselage skin and bear strap at the forward galley
door between certain stations for cracks, 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 November
15, 2019.
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-2019-0705.
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-2019-
0705; 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, the regulatory evaluation, any comments received, and other
information. The street address for Docket Operations is listed above.
Comments will be available in the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Michael Bumbaugh, Aerospace Engineer,
Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des
Moines, WA 98198; phone and fax: 206-231-3522; 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 the ADDRESSES section. Include ``Docket No. FAA-2019-0705 Product
Identifier 2019-NM-098-AD'' at the beginning of your comments. The FAA
specifically invites comments on the overall regulatory, economic,
environmental, and energy aspects of this NPRM. The FAA will consider
all comments received by the closing date and may amend this NPRM
because of those comments.
The FAA will post all comments received, without change, to http://www.regulations.gov, including any personal information you provide.
The FAA will also post a report summarizing each substantive verbal
contact received about this proposed AD.
Discussion
The FAA has received reports of cracks in the bear strap from
station (STA) 290 to STA 296, and between S-8R and S-9R, sometimes
common to fasteners in the gap cover and emanating from rough sanding
marks found on the surface of the bear strap. Bear strap cracking is
the result of poor workmanship during production after the skin and
bear strap hot bond process. The FAA has determined that the cracking
is occurring in the bear strap, where the adhesive bond flash removal
was performed with an abrasive material. Cracking of the bear strap, if
not addressed, could result in severing of the bear strap, possibly
leading to uncontrolled decompression of the airplane and loss of
structural integrity of the airplane.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin 737-53A1383 RB,
dated May 9, 2019. This service information describes procedures for
inspecting for cracks of the fuselage skin and bear strap at the
forward galley door between certain stations, through the use of two
alternative inspection methods: (1) Internal and external general
visual inspections and internal surface high frequency eddy current
(HFEC) inspections, and (2) external general visual and external eddy
current inspections, and applicable on-condition actions. On-condition
actions include inspections for cracks, HFEC inspections for cracks,
low frequency eddy current (LFEC) inspections for cracks, and repair,
depending on the inspection method selected. 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
The FAA is proposing this AD because the agency 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 in Boeing Alert Requirements Bulletin 737-53A1383 RB, dated
May 9, 2019, described previously, 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-2019-0705.
[[Page 52048]]
Costs of Compliance
The FAA estimates that this proposed AD affects 752 airplanes of
U.S. registry. The FAA estimates the following costs to comply with
this proposed AD:
Estimated Costs for Required Actions: Option 1
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Cost on U.S.
Action Labor cost Parts cost Cost per product operators
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Internal general visual 11 work-hours x $85 per $0 $935.............. $703,120.
inspection. hour = $935.
External general visual 1 work-hour x $85 per 0 $85............... $63,920.
inspection. hour = $85.
Internal Surface HFEC 3 work-hours x $85 per 0 $255 per $191,760 per
inspections. hour = $255 per inspection cycle. inspection cycle.
inspection cycle.
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Estimated Costs for Required Actions: Option 2
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Cost on U.S.
Action Labor cost Parts cost Cost per product operators
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External general visual 1 work-hour x $85 per $0 $85............... $63,920.
inspection. hour = $85.
External LFEC and HFEC 18 work-hours x $85 per 0 $1,530 per $1,150,560 per
inspections. hour = $1,530 per inspection cycle. inspection cycle.
inspection cycle.
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The FAA has received no definitive data that would enable the
agency to provide cost estimates for the on-condition actions specified
in this proposed AD.
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.
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 and associated appliances to the
Director of the System Oversight Division.
Regulatory Findings
The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The 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-2019-0705 Product Identifier
2019-NM-098-AD.
(a) Comments Due Date
The FAA must receive comments by November 15, 2019.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 737-600, -700, -
700C, -800, and -900 series airplanes, certificated in any category,
as identified in Boeing Alert Requirements Bulletin 737-53A1383 RB,
dated May 9, 2019.
(d) Subject
Air Transport Association (ATA) of America Code 53, Fuselage.
(e) Unsafe Condition
This AD was prompted by reports of cracks in the bear strap from
station (STA) 290 to STA 296, and between S-8R and S-9R, sometimes
common to fasteners in the gap cover and emanating from rough
sanding marks found on the surface of the bear strap. The FAA is
issuing this AD to address cracking of the bear strap, which could
result in severing of the bear strap, possibly leading to
uncontrolled decompression of the airplane and loss of structural
integrity of the airplane.
(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 737-53A1383 RB, dated May 9, 2019, do
all applicable actions identified in, and in accordance with, the
Accomplishment Instructions of Boeing Alert
[[Page 52049]]
Requirements Bulletin 737-53A1383 RB, dated May 9, 2019.
Note 1 to paragraph (g) of this AD: Guidance for accomplishing
the actions required by this AD can be found in Boeing Alert Service
Bulletin 737-53A1383, dated May 9, 2019, which is referred to in
Boeing Alert Requirements Bulletin 737-53A1383 RB, dated May 9,
2019.
(h) Exceptions to Service Information Specifications
(1) For purposes of determining compliance with the requirements
of this AD: Where Boeing Alert Requirements Bulletin 737-53A1383 RB,
dated May 9, 2019, uses the phrase ``the original issue date of
Requirements Bulletin 737-53A1383 RB,'' this AD requires using ``the
effective date of this AD,'' except where Boeing Alert Requirements
Bulletin 737-53A1383 RB, dated May 9, 2019, uses the phrase ``the
original issue date of Requirements Bulletin 737-53A1383 RB'' in a
note or flag note.
(2) Where Boeing Alert Requirements Bulletin 737-53A1383 RB,
dated May 9, 2019, specifies contacting Boeing for repair
instructions or for alternative inspections: This AD requires doing
the repair, or doing the alternative inspections and applicable on-
condition actions, using a method approved in accordance with the
procedures specified in paragraph (i) 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 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 (j)(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 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.
(j) Related Information
(1) For more information about this AD, contact Michael
Bumbaugh, Aerospace Engineer, Airframe Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax:
206-231-3522; 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 September 16, 2019.
Suzanne Masterson,
Acting Director, System Oversight Division, Aircraft Certification
Service.
[FR Doc. 2019-21187 Filed 9-30-19; 8:45 am]
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