Airworthiness Directives; The Boeing Company Airplanes, 29105-29108 [2019-13057]
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Federal Register / Vol. 84, No. 120 / Friday, June 21, 2019 / Proposed Rules
specified in paragraph 1.E., ‘‘Compliance’’ of
APB Alert Service Bulletin AP757–53–002,
Revision 2, dated April 11, 2019, do all
applicable actions identified in, and in
accordance with, the Accomplishment
Instructions of Boeing Alert Requirements
Bulletin 757–53A0112 RB, dated November
16, 2018.
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(h) Exceptions to Service Information
Specifications
(1) For purposes of determining
compliance with the requirements of this AD:
Where Boeing Alert Requirements Bulletin
757–53A0112 RB, dated November 16, 2018,
uses the phrase ‘‘the original issue date of
Requirements Bulletin 757–53A0112 RB,’’
this AD requires using ‘‘the effective date of
this AD,’’ except where Boeing Alert
Requirements Bulletin 757–53A0112 RB,
dated November 16, 2018, uses the phrase
‘‘the original issue date of Requirements
Bulletin 757–53A0112 RB’’ in a note or flag
note.
(2) Where Boeing Alert Requirements
Bulletin 757–53A0112 RB, dated November
16, 2018, 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.
(3) For purposes of determining
compliance with the requirements of this AD:
Where APB Alert Service Bulletin AP757–
53–002, Revision 2, dated April 11, 2019,
uses the phrase ‘‘the original issue date of
this service bulletin,’’ this AD requires using
‘‘the effective date of this AD,’’ except where
APB Alert Service Bulletin AP757–53–002,
Revision 2, dated April 11, 2019, uses the
phrase ‘‘the original issue date of this Service
Bulletin’’ in a note or flag note.
(4) Where APB Alert Service Bulletin
AP757–53–002, Revision 2, dated April 11,
2019, specifies contacting Boeing for repair
instructions or for alternative inspections:
This AD requires doing the repair, or doing
the alternative inspections and applicable oncondition 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, Los Angeles 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: 9ANM-LAACO-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,
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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, Los Angeles 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 specified by paragraph (h) of
this AD: For service information that
contains steps that are labeled as Required
for Compliance (RC), the provisions of
paragraphs (i)(4)(i) and (i)(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.
(j) Related Information
(1) For more information about this AD,
contact Peter Jarzomb, Aerospace Engineer,
Airframe Section, FAA, Los Angeles ACO
Branch, 3960 Paramount Boulevard,
Lakewood, CA 90712–4137; phone: 562–627–
5234; fax: 562–627–5210; email:
peter.jarzomb@faa.gov.
(2) For Boeing 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.
(3) For Aviation Partners Boeing service
information identified in this AD, contact
Aviation Partners Boeing, 2811 South 102nd
St., Suite 200, Seattle, WA 98168; phone:
206–830–7699; fax: 206–767–3355; email:
leng@aviationpartners.com; internet: https://
www.aviationpartnersboeing.com.
(4) 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 June
10, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division,
Aircraft Certification Service.
[FR Doc. 2019–13047 Filed 6–20–19; 8:45 am]
BILLING CODE 4910–13–P
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29105
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2019–0406; Product
Identifier 2019–NM–059–AD]
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 all
The Boeing Company Model MD–90–30
airplanes. This proposed AD was
prompted by reports indicating that
certain center wing stringers and skins
have been identified to potentially be
susceptible to cracking. This proposed
AD would require repetitive eddy
current, low frequency (ETLF)
inspections of the left and right side
fastener holes for any crack; repetitive
eddy current, high frequency (ETHF)
inspections of the lower skin for any
crack; and repair if any crack is found.
The FAA is proposing this AD to
address the unsafe condition on these
products.
SUMMARY:
The FAA must receive comments
on this proposed AD by August 5, 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
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 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
DATES:
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29106
Federal Register / Vol. 84, No. 120 / Friday, June 21, 2019 / Proposed Rules
https://www.regulations.gov by searching
for and locating Docket No. FAA–2019–
0406.
Examining the AD Docket
You may examine the AD docket on
the internet at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2019–
0406; 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:
David Truong, Aerospace Engineer,
Airframe Section, FAA, Los Angeles
ACO Branch, 3960 Paramount
Boulevard, Lakewood, CA 90712–4137;
phone: 562–627–5224; fax: 562–627–
5210; email: david.truong@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 the ADDRESSES section. Include
‘‘Docket No. FAA–2019–0406; Product
Identifier 2019–NM–059–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,
without change, to https://
www.regulations.gov, including any
personal information you provide. The
FAA will also post a report
summarizing each substantive verbal
contact the agency receives about this
NPRM.
Discussion
The FAA has received reports
indicating that the fastener holes
common to stringers (S) S–11 through
S–22, and around the external bracket
angle at S–18 and S–19 have been
identified to potentially be susceptible
to cracking on the Model MD–90
airplanes. This determination is based
on Model MD–80 airplane service
experience. The Model MD–80 and
Model MD–90 wings share the same
basic design and have similar stresses.
Operators of Model MD–80 airplanes
have reported finding cracks in the
center wing lower stringers, lower
stringer end fittings, and lower forward
and aft skins. The cracks in stringers
occur at the inboard end where they are
joined to the airplane centerline by end
fittings. Cracks in the end fittings occur
at the outboard end where they attach
to stringers. The wing skin cracks occur
underneath a cracked stringer. The
cause of the cracks has been determined
to be from fatigue. The Boeing Company
has not received any reports of cracks
on Model MD–90 airplanes; however,
the similarities with the Model MD–80
wings require agency action. If not
addressed, cracking of the center wing
stringers and skins could result in the
inability of the structure to sustain limit
loads, and adversely affect the structural
integrity of the airplane.
Other Relevant Rulemaking
The FAA issued AD 2016–07–28 (81
FR 21253, April 11, 2016) for all The
Boeing Company Model DC–9–81 (MD–
81), DC–9–82 (MD–82), DC–9–83 (MD–
83), and DC–9–87 (MD–87) airplanes,
and Model MD–88 airplanes. That AD
requires repetitive ETHF inspections for
any cracking in the left and right side
center wing lower skin, and corrective
actions if necessary. That AD addresses
cracks at S–15, S–16, or S–17,
associated end fittings, and skins in the
center wing fuel tank where the
stringers meet the end fittings near
Xcw=13 and Xcw=15. Such cracking
could cause structural failure of the
wings. Since that AD was issued,
cracking has been found at fastener
holes common to stringers S–11 through
S–22, and around the external bracket
angle at S–18 and S–19. These areas
were not addressed in AD 2016–07–28
or Boeing Alert Service Bulletin MD80–
57A244, dated March 3, 2016, which is
the service information operators are
required to follow to complete the
actions required by AD 2016–07–28.
Boeing is developing new service
information for Model MD–80 airplanes
to address these additional areas where
cracking was found. The FAA will
consider further rulemaking to address
the identified unsafe condition for
Model MD–80 airplanes once this
service information is approved.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Boeing Alert
Service Bulletin MD90–57A031, dated
March 19, 2019. This service
information describes procedures for
repetitive ETLF inspections of the left
and right side fastener holes for any
crack, repetitive ETHF inspections of
the lower skin for any crack, and repair
if any crack is found.
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 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
accomplishing the actions specified in
the service information described
previously. 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–2019–
0406.
Costs of Compliance
The FAA estimates that this proposed
AD affects 43 airplanes of U.S. registry.
The FAA estimates the following costs
to comply with this proposed AD:
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ESTIMATED COSTS
Action
Labor cost
Inspection .........
30 work-hours × $85 per hour = $2,550 per inspection cycle.
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Cost per
product
Parts cost
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$0
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$2,550 per inspection
cycle.
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Cost on U.S.
operators
$109,650 per inspection
cycle.
Federal Register / Vol. 84, No. 120 / Friday, June 21, 2019 / Proposed Rules
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
The FAA has received no definitive
data that would enable the agency to
provide cost estimates for the oncondition 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.
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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.
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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 (AD):
■
The Boeing Company: Docket No. FAA–
2019–0406; Product Identifier 2019–
NM–059–AD.
(a) Comments Due Date
The FAA must receive comments by
August 5, 2019.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all The Boeing
Company Model MD–90–30 airplanes,
certificated in any category.
(d) Subject
Air Transport Association (ATA) of
America Code 57, Wings.
(e) Unsafe Condition
This AD was prompted by reports
indicating that certain center wing stringers
and skins have been identified to potentially
be susceptible to cracking. The FAA is
issuing this AD to address cracking of the
center wing stringers and skins, which could
result in the inability of the structure to
sustain limit loads, and adversely affect the
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 in paragraph (h) of this
AD: At the applicable times specified in
paragraph 1.E., ‘‘Compliance,’’ of Boeing
Alert Service Bulletin MD90–57A031, dated
March 19, 2019, do all applicable actions
identified as ‘‘RC’’ (required for compliance)
in, and in accordance with, the
Accomplishment Instructions of Boeing Alert
Service Bulletin MD90–57A031, dated March
19, 2019.
(h) Exceptions to Service Information
Specifications
(1) For purposes of determining
compliance with the requirements of this AD:
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29107
Where Boeing Alert Service Bulletin MD90–
57A031, dated March 19, 2019, uses the
phrase ‘‘the original issue date of this service
bulletin,’’ this AD requires using ‘‘the
effective date of this AD.’’
(2) Where Boeing Alert Service Bulletin
MD90–57A031, dated March 19, 2019,
specifies contacting Boeing for repair
instructions and doing the repair: This AD
requires doing the repair 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, Los Angeles 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 9ANM-LAACO-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 Company
Organization Designation Authorization
(ODA) that has been authorized by the
Manager, Los Angeles 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 specified by paragraph (h) of
this AD: For service information that
contains steps that are labeled as Required
for Compliance (RC), the provisions of
paragraphs (i)(4)(i) and (i)(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.
(j) Related Information
(1) For more information about this AD,
contact David Truong, Aerospace Engineer,
Airframe Section, FAA, Los Angeles ACO
Branch, 3960 Paramount Boulevard,
Lakewood, CA 90712–4137; phone: 562–627–
5224; fax: 562–627–5210; email:
david.truong@faa.gov.
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Federal Register / Vol. 84, No. 120 / Friday, June 21, 2019 / Proposed Rules
(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
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 June
4, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division,
Aircraft Certification Service.
[FR Doc. 2019–13057 Filed 6–20–19; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2019–0436; Product
Identifier 2019–NM–014–AD]
RIN 2120–AA64
Examining the AD Docket
Airworthiness Directives; Bombardier,
Inc., 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 Bombardier, Inc., Model CL–
600–2B19 (Regional Jet Series 100 &
440), CL–600–2C10 (Regional Jet Series
700, 701 & 702), CL–600–2D15
(Regional Jet Series 705), CL–600–2D24
(Regional Jet Series 900), and CL–600–
2E25 (Regional Jet Series 1000)
airplanes. This proposed AD was
prompted by reports of power control
unit (PCU) rod end fractures due to
pitting corrosion. This proposed AD
would require revising the existing
maintenance or inspection program, as
applicable, to incorporate new or more
restrictive airworthiness limitations.
This proposed AD would also require
detailed inspections of the elevator PCU
rod ends and applicable corrective
actions. This proposed AD would also
prohibit using certain aircraft
maintenance manual tasks. 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 5, 2019.
ADDRESSES: You may send comments,
using the procedures found in 14 CFR
11.43 and 11.45, by any of the following
methods:
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SUMMARY:
VerDate Sep<11>2014
17:15 Jun 20, 2019
• 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 Bombardier, Inc.,
400 Coˆte-Vertu Road West, Dorval,
Que´bec H4S 1Y9, Canada; Widebody
Customer Response Center North
America toll-free telephone 1–866–538–
1247 or direct-dial telephone 1–514–
855–2999; fax 514–855–7401; email
ac.yul@aero.bombardier.com; internet
https://www.bombardier.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.
Jkt 247001
You may examine the AD docket on
the internet at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2019–
0436; 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:
Darren Gassetto, Aerospace Engineer,
Mechanical Systems and Admin
Services Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite
410, Westbury, NY 11590; telephone
516–228–7323; fax 516–794–5531; email
9-avs-nyaco-cos@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 the ADDRESSES section. Include
‘‘Docket No. FAA–2019–0436; Product
Identifier 2019–NM–014–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
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Sfmt 4702
and may amend this NPRM because of
those comments.
The FAA will post all comments the
agency receives, without change, to
https://www.regulations.gov, including
any personal information you provide.
The FAA will also post a report
summarizing each substantive verbal
contact the agency receives about this
NPRM.
Discussion
Transport Canada Civil Aviation
(TCCA), which is the aviation authority
for Canada, has issued Canadian AD
CF–2018–29, dated November 2, 2018
(referred to after this as the Mandatory
Continuing Airworthiness Information,
or ‘‘the MCAI’’), to correct an unsafe
condition for certain Bombardier, Inc.,
Model CL–600–2B19 (Regional Jet
Series 100 & 440), CL–600–2C10
(Regional Jet Series 700, 701 & 702), CL–
600–2D15 (Regional Jet Series 705), CL–
600–2D24 (Regional Jet Series 900), and
CL–600–2E25 (Regional Jet Series 1000)
airplanes. The MCAI states:
There have been several in-service reports
of Power Control Unit (PCU) rod end
fractures due to pitting corrosion.
Investigation revealed that the PCU rod end
spherical bearing could seize which, in turn,
could induce a bending moment on the PCU
output rod. This bending moment will
eventually fracture the rod end. It was also
noted that this failure mode typically occurs
within the first 6000 hours of aeroplane
operation.
This condition, if not corrected, could lead
to a disconnect between the PCU and the
control surface, potential loss of the control
surface function or inadequate flutter
suppression.
This [Canadian] AD mandates
incorporation of revised tasks into the
maintenance manuals for detailed
inspections of the PCU rod ends in order to
allow timely detection of pitting corrosion
[and would prohibit using certain aircraft
maintenance manual tasks].
You may examine the MCAI in the
AD docket on the internet at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2019–
0436.
Related Service Information Under 1
CFR Part 51
Bombardier, Inc., has issued the
following service information.
Bombardier Service Bulletin 670BA–
27–074, dated June 22, 2017. This
service information describes
procedures for detailed inspections for
pitting and corrosion of the left and
right rod ends of the elevator PCUs and
to make sure that the spherical ball and
inner race of the rod ends move freely,
and applicable corrective actions.
Corrective actions include installing a
new PCU.
E:\FR\FM\21JNP1.SGM
21JNP1
]]>Agencies
[Federal Register Volume 84, Number 120 (Friday, June 21, 2019)]
[Proposed Rules]
[Pages 29105-29108]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-13057]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2019-0406; Product Identifier 2019-NM-059-AD]
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 all The Boeing Company Model MD-90-30 airplanes. This proposed AD
was prompted by reports indicating that certain center wing stringers
and skins have been identified to potentially be susceptible to
cracking. This proposed AD would require repetitive eddy current, low
frequency (ETLF) inspections of the left and right side fastener holes
for any crack; repetitive eddy current, high frequency (ETHF)
inspections of the lower skin for any crack; and repair if any crack is
found. 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 5,
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 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 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
[[Page 29106]]
https://www.regulations.gov by searching for and locating Docket No.
FAA-2019-0406.
Examining the AD Docket
You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2019-
0406; 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: David Truong, Aerospace Engineer,
Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount
Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5224; fax: 562-627-
5210; 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-2019-0406;
Product Identifier 2019-NM-059-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, without change, to https://www.regulations.gov, including any personal information you provide.
The FAA will also post a report summarizing each substantive verbal
contact the agency receives about this NPRM.
Discussion
The FAA has received reports indicating that the fastener holes
common to stringers (S) S-11 through S-22, and around the external
bracket angle at S-18 and S-19 have been identified to potentially be
susceptible to cracking on the Model MD-90 airplanes. This
determination is based on Model MD-80 airplane service experience. The
Model MD-80 and Model MD-90 wings share the same basic design and have
similar stresses.
Operators of Model MD-80 airplanes have reported finding cracks in
the center wing lower stringers, lower stringer end fittings, and lower
forward and aft skins. The cracks in stringers occur at the inboard end
where they are joined to the airplane centerline by end fittings.
Cracks in the end fittings occur at the outboard end where they attach
to stringers. The wing skin cracks occur underneath a cracked stringer.
The cause of the cracks has been determined to be from fatigue. The
Boeing Company has not received any reports of cracks on Model MD-90
airplanes; however, the similarities with the Model MD-80 wings require
agency action. If not addressed, cracking of the center wing stringers
and skins could result in the inability of the structure to sustain
limit loads, and adversely affect the structural integrity of the
airplane.
Other Relevant Rulemaking
The FAA issued AD 2016-07-28 (81 FR 21253, April 11, 2016) for all
The Boeing Company Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83
(MD-83), and DC-9-87 (MD-87) airplanes, and Model MD-88 airplanes. That
AD requires repetitive ETHF inspections for any cracking in the left
and right side center wing lower skin, and corrective actions if
necessary. That AD addresses cracks at S-15, S-16, or S-17, associated
end fittings, and skins in the center wing fuel tank where the
stringers meet the end fittings near Xcw=13 and Xcw=15. Such cracking
could cause structural failure of the wings. Since that AD was issued,
cracking has been found at fastener holes common to stringers S-11
through S-22, and around the external bracket angle at S-18 and S-19.
These areas were not addressed in AD 2016-07-28 or Boeing Alert Service
Bulletin MD80-57A244, dated March 3, 2016, which is the service
information operators are required to follow to complete the actions
required by AD 2016-07-28. Boeing is developing new service information
for Model MD-80 airplanes to address these additional areas where
cracking was found. The FAA will consider further rulemaking to address
the identified unsafe condition for Model MD-80 airplanes once this
service information is approved.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Boeing Alert Service Bulletin MD90-57A031, dated
March 19, 2019. This service information describes procedures for
repetitive ETLF inspections of the left and right side fastener holes
for any crack, repetitive ETHF inspections of the lower skin for any
crack, and repair if any crack is found.
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 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 accomplishing the actions specified
in the service information described previously. 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-2019-
0406.
Costs of Compliance
The FAA estimates that this proposed AD affects 43 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
----------------------------------------------------------------------------------------------------------------
Inspection................. 30 work-hours x $85 $0 $2,550 per inspection $109,650 per
per hour = $2,550 cycle. inspection cycle.
per inspection cycle.
----------------------------------------------------------------------------------------------------------------
[[Page 29107]]
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-2019-0406; Product Identifier
2019-NM-059-AD.
(a) Comments Due Date
The FAA must receive comments by August 5, 2019.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all The Boeing Company Model MD-90-30
airplanes, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 57, Wings.
(e) Unsafe Condition
This AD was prompted by reports indicating that certain center
wing stringers and skins have been identified to potentially be
susceptible to cracking. The FAA is issuing this AD to address
cracking of the center wing stringers and skins, which could result
in the inability of the structure to sustain limit loads, and
adversely affect the 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 in paragraph (h) of this AD: At the
applicable times specified in paragraph 1.E., ``Compliance,'' of
Boeing Alert Service Bulletin MD90-57A031, dated March 19, 2019, do
all applicable actions identified as ``RC'' (required for
compliance) in, and in accordance with, the Accomplishment
Instructions of Boeing Alert Service Bulletin MD90-57A031, dated
March 19, 2019.
(h) Exceptions to Service Information Specifications
(1) For purposes of determining compliance with the requirements
of this AD: Where Boeing Alert Service Bulletin MD90-57A031, dated
March 19, 2019, uses the phrase ``the original issue date of this
service bulletin,'' this AD requires using ``the effective date of
this AD.''
(2) Where Boeing Alert Service Bulletin MD90-57A031, dated March
19, 2019, specifies contacting Boeing for repair instructions and
doing the repair: This AD requires doing the repair 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, Los Angeles 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, Los
Angeles 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 specified by paragraph (h) of this AD: For service
information that contains steps that are labeled as Required for
Compliance (RC), the provisions of paragraphs (i)(4)(i) and
(i)(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.
(j) Related Information
(1) For more information about this AD, contact David Truong,
Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch,
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5224; fax: 562-627-5210; email: [email protected].
[[Page 29108]]
(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 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 June 4, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification
Service.
[FR Doc. 2019-13057 Filed 6-20-19; 8:45 am]
BILLING CODE 4910-13-P
