Airworthiness Directives; Learjet, Inc. Airplanes, 20740-20743 [2018-09600]
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sradovich on DSK3GMQ082PROD with PROPOSALS
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Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules
(c) From subsection (e)(1) (Relevancy and
Necessity of Information) because in the
course of investigations into potential
violations of federal law, the accuracy of
information obtained or introduced
occasionally may be unclear, or the
information may not be strictly relevant or
necessary to a specific investigation. In the
interests of effective law enforcement, it is
appropriate to retain all information that may
aid in establishing patterns of unlawful
activity.
(d) From subsection (e)(2) (Collection of
Information from Individuals) because
requiring that information be collected from
the subject of an investigation would alert the
subject to the nature or existence of the
investigation, thereby interfering with that
investigation and related law enforcement
activities.
(e) From subsection (e)(3) (Notice to
Subjects) because providing such detailed
information could impede law enforcement
by compromising the existence of a
confidential investigation or reveal the
identity of witnesses or confidential
informants.
(f) From subsections (e)(4)(G), (e)(4)(H),
(e)(4)(I), (Agency Requirements) and (f)
(Agency Rules), because portions of this
system are exempt from the individual access
provisions of subsection (d) for the reasons
noted above, and therefore DHS is not
required to establish requirements, rules, or
procedures with respect to such access.
Providing notice to individuals with respect
to existence of records pertaining to them in
the system of records or otherwise setting up
procedures pursuant to which individuals
may access and view records pertaining to
themselves in the system would undermine
investigative efforts and reveal the identities
of witnesses, and potential witnesses, and
confidential informants.
(g) From subsection (e)(5) (Collection of
Information) because with the collection of
information for law enforcement purposes, it
is impossible to determine in advance what
information is accurate, relevant, timely, and
complete. Compliance with subsection (e)(5)
would preclude DHS agents from using their
investigative training and exercise of good
judgment to both conduct and report on
investigations.
(h) From subsection (e)(8) (Notice on
Individuals) because compliance would
interfere with DHS’s ability to obtain, serve,
and issue subpoenas, warrants, and other law
enforcement mechanisms that may be filed
under seal and could result in disclosure of
investigative techniques, procedures, and
evidence.
(i) From subsection (g) (Civil Remedies) to
the extent that the system is exempt from
other specific subsections of the Privacy Act.
*
*
*
*
*
Philip S. Kaplan
Chief Privacy Officer, Department of
Homeland Security.
[FR Doc. 2018–09906 Filed 5–7–18; 8:45 am]
BILLING CODE 9111–28–P
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2018–0327; Product
Identifier 2018–CE–001–AD]
RIN 2120–AA64
Airworthiness Directives; Learjet, Inc.
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for certain
Learjet, Inc. Models 28, 29, 31, 31A, 35,
35A, 36, 36A, 55, 55B, 55C, and 60
airplanes. This proposed AD was
prompted by fatigue cracks initiating in
the flap support structure due to
repetitive flap loads, which has caused
flap nose roller support bracket failure.
This proposed AD would require
replacement of the flap nose roller
fitting, nose roller support bracket, and
adjacent rib support structure with more
robust components. We are proposing
this AD to address the unsafe condition
on these products.
DATES: We must receive comments on
this proposed AD by June 22, 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
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 Learjet, Inc., One
Learjet Way, Wichita, Kansas 67209;
telephone: 316–946–2000; email: ac.ict@
aero.bombardier.com; internet: https://
www.bombardier.com. You may view
this service information at the FAA,
Policy and Innovation Division, 901
Locust, Kansas City, Missouri 64106.
For information on the availability of
this material at the FAA, call (816) 329–
4148.
SUMMARY:
Examining the AD Docket
You may examine the AD docket on
the internet at https://
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www.regulations.gov by searching for
and locating Docket No. FAA–2018–
0327; 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
(phone: 800–647–5527) is listed above.
Comments will be available in the AD
docket shortly after receipt.
Tara
Shawn, Aerospace Engineer, Wichita
ACO Branch, 1801 Airport Road, Room
100, Wichita, Kansas 67209; telephone:
(316) 946–4141; fax: (316) 946–4107;
email: tara.shawn@faa.gov or WichitaCOS@faa.gov.
FOR FURTHER INFORMATION CONTACT:
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–
2018–0327; Product Identifier 2018–CE–
001–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 https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this NPRM.
Discussion
We received a report of skewed flap
and aileron binding due to fatigue
cracks in the flap support structure
caused by repetitive flap loads on a
Learjet, Inc. Model 31A. As of June
2017, cracks in the flap support
structure were reported (due to Alert
Service Bulletins published in March
2017) on Models 31, 31A, 35A, 55, and
60 airplanes. Repetitive flap loads occur
on all models identified by this
proposed AD. Failure of the flap nose
roller support bracket allows skewed
flap and aileron binding, which can
cause loss of roll control on approach.
This condition, if not addressed, could
result in loss of control.
Although there have been no reports
of cracks on the Models 28, 29, 35, 36,
36A, 55B, and 55C airplanes, these
airplanes do incorporate the same
design flap support structure.
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Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules
Related Service Information
Under 1 CFR Part 51
We reviewed Bombardier Learjet 28/
29 Service Bulletin (SB) 28/29–27–31
Recommended, dated September 11,
2017; Bombardier Learjet 31 SB 31–27–
35 Recommended, dated September 11,
2017; Bombardier Learjet 35/36 SB 35/
36 -27–50 Recommended, dated
September 11, 2017; Bombardier Learjet
55 SB 55–27–41 Recommended, dated
September 11, 2017; and Bombardier
Learjet 60 SB 60–27–39 Recommended,
Revision 1, dated January 15, 2018. For
the applicable models, the service
information describes procedures for
replacement of the flap nose roller
fitting, nose roller support bracket, and
adjacent rib support structure with
improved components. The service
information also contains instructions to
ensure correct flap alignment. 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
accomplishing the actions specified in
the service information described
previously.
Differences Between This Proposed AD
and the Service Information
The published service information
does not list Models 31A, 35A, 36A,
55B, or 55C as affected models.
However, the serial numbers in the
service information does reflect these
models. The serial numbers in the
service information (except for Models
28/29) does not start with –001, but the
effectivity in this AD starts with –001
for all models. The service information
for all models also specifies to submit a
compliance response form to the
manufacturer; however, this AD does
not require that action.
Costs of Compliance
We estimate that this proposed AD
affects 706 airplanes of U.S. registry.
We estimate the following costs to
comply with this proposed AD:
ESTIMATED COSTS
Action
Labor cost
Replacement of flap nose roller fitting, nose roller support
bracket, and adjacent rib support structure with improved
components.
Parts cost *
188 work-hours × $85 per
hour = $15,980.
$12,213
Cost per
product
Cost on U.S.
operators
$28,193
$19,904,258
* Parts cost is an average of the composite costs for replacement of all of the kits per airplane. Not all airplanes will need all kits, as credit is
allowed for some previous installations.
the Administrator finds necessary for
safety in air commerce. This regulation
Kit No. (K/N)
Part cost
is within the scope of that authority
because it addresses an unsafe condition
K/N 2381000–802 .................
$827 that is likely to exist or develop on
K/N 2381000–804 .................
822
products identified in this rulemaking
K/N 2381000–806 .................
780
K/N 2381000–808 .................
793 action.
K/N 2381000–809 .................
1,358
This AD is issued in accordance with
K/N 2381000–810 .................
1,358 authority delegated by the Executive
K/N 2381000–811 .................
1,822 Director, Aircraft Certification Service,
K/N 2381000–817 .................
1,674 as authorized by FAA Order 8000.51C.
K/N 2381000–818 .................
1,432
In accordance with that order, issuance
K/N 2381000–819 .................
1,415
K/N 2381000–820 .................
1,912 of ADs is normally a function of the
K/N 2381000–821 .................
1,912 Compliance and Airworthiness
Division, but during this transition
* Parts required for replacement may vary period, the Executive Director has
for different models and different airplanes.
delegated the authority to issue ADs
Authority for This Rulemaking
applicable to small airplanes, gliders,
balloons, airships, domestic business jet
Title 49 of the United States Code
transport airplanes, and associated
specifies the FAA’s authority to issue
appliances to the Director of the Policy
rules on aviation safety. Subtitle I,
and Innovation Division.
section 106, describes the authority of
the FAA Administrator. Subtitle VII:
Regulatory Findings
Aviation Programs, describes in more
We determined that this proposed AD
detail the scope of the Agency’s
would not have federalism implications
authority.
We are issuing this rulemaking under under Executive Order 13132. This
the authority described in Subtitle VII,
proposed AD would not have a
Part A, Subpart III, Section 44701:
substantial direct effect on the States, on
‘‘General requirements.’’ Under that
the relationship between the national
section, Congress charges the FAA with government and the States, or on the
promoting safe flight of civil aircraft in
distribution of power and
air commerce by prescribing regulations responsibilities among the various
for practices, methods, and procedures
levels of government.
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INDIVIDUAL PARTS COST *
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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
1. The authority citation for part 39
continues to read as follows:
■
Authority: 49 U.S.C. 106(g), 40113, 44701.
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(a) Comments Due Date
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive (AD):
■
Learjet, Inc.: Docket No. FAA–2018–0327;
Product Identifier 2018–CE–001–AD.
Joint Aircraft System Component (JASC)/
Air Transport Association (ATA) of America
Code 2750, TE Flap Control System.
(e) Unsafe Condition
This AD was prompted by reports of
fatigue cracks initiating in the flap support
structure due to repetitive flap loads. We are
issuing this AD to require replacement of the
flap nose roller fitting, nose roller support
bracket, and adjacent rib support structure
with more robust components. The unsafe
condition, if not addressed, could cause flap
nose roller support bracket failure and allow
skewed flap and aileron binding, which
could result in loss of roll control on
approach with consequent loss of control.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
sradovich on DSK3GMQ082PROD with PROPOSALS
(g) Corrective Action
(1) For Models 28 and 29 airplanes: (i)
Within the next 24 months after the effective
date of this AD or within the next 400
landings after the effective date of this AD,
whichever occurs first, replace the nose roller
fitting, nose roller support bracket, and
adjacent rib support structure with
replacements parts following the
Accomplishment Instructions in Bombardier
Learjet 28/29 Service Bulletin (SB) 28/29–27–
31 Recommended, dated September 11, 2017.
16:44 May 07, 2018
Jkt 244001
(1) This AD applies to the following
Learjet, Inc. model airplanes that are
certificated in any category:
(b) Affected ADs
None.
(d) Subject
VerDate Sep<11>2014
(c) Applicability
We must receive comments by June 22,
2018.
(ii) Paragraph 3.B.(1) of the applicable SB
for these models that have modified flap
roller assemblies requires the operator to
contact Learjet Inc. for repair instructions,
and after receiving the repair instructions
from Learjet, the operator will need to
request an AMOC as specified in paragraph
(j) of this AD in order to use the repair.
(2) For Models 31 and 31A airplanes:
Within the next 24 months after the effective
date of this AD or within the next 400
landings after the effective date of this AD,
whichever occurs first, replace the nose roller
fitting, nose roller support bracket and
adjacent rib support structure with
replacements parts following the
Accomplishment Instructions in Bombardier
Learjet 31 SB 31–27–35 Recommended, dated
September 11, 2017.
(3) For Models 35, 35A, 36, and 36A
airplanes: Within the next 24 months after
the effective date of this AD or within the
next 400 landings after the effective date of
this AD, whichever occurs first, replace the
nose roller fitting, nose roller support bracket
and adjacent rib support structure with
replacements parts following the
Accomplishment Instructions in Bombardier
Learjet 35/36 SB 35/36–27–50
Recommended, dated September 11, 2017.
(4) For Models 55, 55B, and 55C airplanes:
Within the next 24 months after the effective
date of this AD or within the next 400
landings after the effective date of this AD,
whichever occurs first, replace the nose roller
fitting, nose roller support bracket, and
adjacent rib support structure with
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Sfmt 4702
replacements parts following the
Accomplishment Instructions in Bombardier
Learjet 55 SB 55–27–41 Recommended, dated
September 11, 2017.
(5) For Model 60 airplanes: Within the next
12 months after the effective date of this AD
or within the next 200 landings after the
effective date of this AD, whichever occurs
first, replace the nose roller fitting, nose
roller support bracket, and adjacent rib
support structure with replacement parts
following the Accomplishment Instructions
in Bombardier Learjet 60 SB 60–27–39
Recommended, Revision 1, dated January 15,
2018.
(6) For all airplanes: The compliance times
in this AD are presented in landings. If you
do not keep a record of the total number of
landings, then use a 1-to-1 conversion for
hours time-in-service (TIS) to landings.
Example: 20 hours TIS = 20 landings.
(7) For Models 31, 31A, 35, 35A, 36, 36A,
55, 55B, 55C, and 60 airplanes: Paragraph
3.B.(2) of the applicable SBs for these models
that have modified flap roller assemblies
requires the operator to contact Learjet Inc.
for repair instructions, and after receiving the
repair instructions from Learjet, the operator
will need to request an alternative method of
compliance (AMOC) as specified in
paragraph (j) of this AD in order to use the
repair.
(h) Credit for Previous Actions
For Model 60 airplanes: This AD allows
credit for actions required in paragraph (g)(5)
of this AD if done before the effective date
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§ 39.13
Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules
Federal Register / Vol. 83, No. 89 / Tuesday, May 8, 2018 / Proposed Rules
of this AD following Bombardier Learjet 60
SB 60–27–39 Recommended, Basic Issue,
dated September 11, 2017.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
(i) No Reporting Requirement
Although Bombardier Learjet 28/29 SB 28/
29–27–31 Recommended, dated September
11, 2017; Bombardier Learjet 31 SB 31–27–
35 Recommended, dated September 11, 2017;
Bombardier Learjet 35/36 SB 35/36 -27–50
Recommended, dated September 11, 2017;
Bombardier Learjet 55 SB 55–27–41
Recommended, dated September 11, 2017;
and Bombardier Learjet 60 SB 60–27–39
Recommended, Revision 1, dated January 15,
2018, all specify to submit a compliance
response form to the manufacturer per
paragraph 3.E., this AD does not require that
action.
(j) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, Wichita 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 (k)(1) of
this AD.
(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.
(k) Related Information
sradovich on DSK3GMQ082PROD with PROPOSALS
(1) For more information about this AD,
contact Tara Shawn, Aerospace Engineer,
Wichita ACO Branch, 1801 Airport Road,
Room 100, Wichita, Kansas 67209; telephone:
(316) 946–4141; fax: (316) 946–4107; email:
tara.shawn@faa.gov or Wichita-COS@faa.gov.
(2) For service information identified in
this AD, contact Learjet, Inc., One Learjet
Way, Wichita, Kansas 67209; telephone: 316–
946–2000; email: ac.ict@
aero.bombardier.com; internet: https://
www.bombardier.com. You may review this
referenced service information at the FAA,
Policy and Innovation Division, 901 Locust,
Kansas City, Missouri 64106. For information
on the availability of this material at the
FAA, call (816) 329–4148.
Issued in Kansas City, Missouri, on April
30, 2018.
Melvin J. Johnson,
Deputy Director, Policy & Innovation Division,
Aircraft Certification Service.
[FR Doc. 2018–09600 Filed 5–7–18; 8:45 am]
BILLING CODE 4910–13–P
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14 CFR Part 39
[Docket No. FAA–2018–0396; Product
Identifier 2017–NM–156–AD]
RIN 2120–AA64
Airworthiness Directives; Airbus
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for all
Airbus Model A300 B4–600, B4–600R,
and F4–600R series airplanes, and
Model A300 C4–605R Variant F
airplanes (collectively called Model
A300–600 series airplanes), and Model
A310 series airplanes. This proposed
AD was prompted by a determination
that new or more restrictive
maintenance requirements and
airworthiness limitations are necessary.
This proposed AD would require
revising the maintenance or inspection
program, as applicable, to incorporate
new or more restrictive maintenance
requirements and airworthiness
limitations. We are proposing this AD to
address the unsafe condition on these
products.
SUMMARY:
We must receive comments on
this proposed AD by June 22, 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
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 Airbus SAS,
Airworthiness Office—EAW, 1 Rond
Point Maurice Bellonte, 31707 Blagnac
Cedex, France; telephone +33 5 61 93 36
96; fax +33 5 61 93 44 51; email
account.airworth-eas@airbus.com;
internet https://www.airbus.com. You
may view this service information at the
FAA, Transport Standards Branch, 2200
South 216th St., Des Moines, WA. For
DATES:
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20743
information on the availability of this
material at the FAA, call 206–231–3195.
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–2018–
0396; 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 Operations office (telephone
800–647–5527) is in the ADDRESSES
section. Comments will be available in
the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Dan
Rodina, Aerospace Engineer,
International Section, Transport
Standards Branch, FAA, 2200 South
216th St., Des Moines, WA 98198;
telephone and fax 206–231–3225.
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–
2018–0396; Product Identifier 2017–
NM–156–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 based
on those comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this NPRM.
Discussion
The European Aviation Safety Agency
(EASA), which is the Technical Agent
for the Member States of the European
Union, has issued EASA Airworthiness
Directive 2017–0202, dated October 12,
2017 (referred to after this as the
Mandatory Continuing Airworthiness
Information, or ‘‘the MCAI’’), to correct
an unsafe condition for all Airbus
Model A300 B4–600, B4–600R, and F4–
600R series airplanes, and Model A300
C4–605R Variant F airplanes
(collectively called Model A300–600
series airplanes), and Model A310 series
airplanes. The MCAI states:
Maintenance requirements and
airworthiness limitations for the Airbus
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]]>Agencies
[Federal Register Volume 83, Number 89 (Tuesday, May 8, 2018)]
[Proposed Rules]
[Pages 20740-20743]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-09600]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2018-0327; Product Identifier 2018-CE-001-AD]
RIN 2120-AA64
Airworthiness Directives; Learjet, Inc. Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Learjet, Inc. Models 28, 29, 31, 31A, 35, 35A, 36, 36A, 55,
55B, 55C, and 60 airplanes. This proposed AD was prompted by fatigue
cracks initiating in the flap support structure due to repetitive flap
loads, which has caused flap nose roller support bracket failure. This
proposed AD would require replacement of the flap nose roller fitting,
nose roller support bracket, and adjacent rib support structure with
more robust components. We are proposing this AD to address the unsafe
condition on these products.
DATES: We must receive comments on this proposed AD by June 22, 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 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 Learjet,
Inc., One Learjet Way, Wichita, Kansas 67209; telephone: 316-946-2000;
email: [email protected]; internet: https://www.bombardier.com. You may view this service information at the FAA,
Policy and Innovation Division, 901 Locust, Kansas City, Missouri
64106. For information on the availability of this material at the FAA,
call (816) 329-4148.
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-2018-
0327; 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 (phone: 800-647-
5527) is listed above. Comments will be available in the AD docket
shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Tara Shawn, Aerospace Engineer,
Wichita ACO Branch, 1801 Airport Road, Room 100, Wichita, Kansas 67209;
telephone: (316) 946-4141; fax: (316) 946-4107; email:
[email protected] or [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-2018-0327;
Product Identifier 2018-CE-001-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 https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this NPRM.
Discussion
We received a report of skewed flap and aileron binding due to
fatigue cracks in the flap support structure caused by repetitive flap
loads on a Learjet, Inc. Model 31A. As of June 2017, cracks in the flap
support structure were reported (due to Alert Service Bulletins
published in March 2017) on Models 31, 31A, 35A, 55, and 60 airplanes.
Repetitive flap loads occur on all models identified by this proposed
AD. Failure of the flap nose roller support bracket allows skewed flap
and aileron binding, which can cause loss of roll control on approach.
This condition, if not addressed, could result in loss of control.
Although there have been no reports of cracks on the Models 28, 29,
35, 36, 36A, 55B, and 55C airplanes, these airplanes do incorporate the
same design flap support structure.
[[Page 20741]]
Related Service Information Under 1 CFR Part 51
We reviewed Bombardier Learjet 28/29 Service Bulletin (SB) 28/29-
27-31 Recommended, dated September 11, 2017; Bombardier Learjet 31 SB
31-27-35 Recommended, dated September 11, 2017; Bombardier Learjet 35/
36 SB 35/36 -27-50 Recommended, dated September 11, 2017; Bombardier
Learjet 55 SB 55-27-41 Recommended, dated September 11, 2017; and
Bombardier Learjet 60 SB 60-27-39 Recommended, Revision 1, dated
January 15, 2018. For the applicable models, the service information
describes procedures for replacement of the flap nose roller fitting,
nose roller support bracket, and adjacent rib support structure with
improved components. The service information also contains instructions
to ensure correct flap alignment. 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 accomplishing the actions specified
in the service information described previously.
Differences Between This Proposed AD and the Service Information
The published service information does not list Models 31A, 35A,
36A, 55B, or 55C as affected models. However, the serial numbers in the
service information does reflect these models. The serial numbers in
the service information (except for Models 28/29) does not start with -
001, but the effectivity in this AD starts with -001 for all models.
The service information for all models also specifies to submit a
compliance response form to the manufacturer; however, this AD does not
require that action.
Costs of Compliance
We estimate that this proposed AD affects 706 airplanes of U.S.
registry.
We estimate the following costs to comply with this proposed AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost * product operators
----------------------------------------------------------------------------------------------------------------
Replacement of flap nose roller 188 work-hours x $85 per $12,213 $28,193 $19,904,258
fitting, nose roller support bracket, hour = $15,980.
and adjacent rib support structure
with improved components.
----------------------------------------------------------------------------------------------------------------
* Parts cost is an average of the composite costs for replacement of all of the kits per airplane. Not all
airplanes will need all kits, as credit is allowed for some previous installations.
Individual Parts Cost *
------------------------------------------------------------------------
Kit No. (K/N) Part cost
------------------------------------------------------------------------
K/N 2381000-802......................................... $827
K/N 2381000-804......................................... 822
K/N 2381000-806......................................... 780
K/N 2381000-808......................................... 793
K/N 2381000-809......................................... 1,358
K/N 2381000-810......................................... 1,358
K/N 2381000-811......................................... 1,822
K/N 2381000-817......................................... 1,674
K/N 2381000-818......................................... 1,432
K/N 2381000-819......................................... 1,415
K/N 2381000-820......................................... 1,912
K/N 2381000-821......................................... 1,912
------------------------------------------------------------------------
* Parts required for replacement may vary for different models and
different airplanes.
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 small airplanes, gliders,
balloons, airships, domestic business jet transport airplanes, and
associated appliances to the Director of the Policy and Innovation
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.
[[Page 20742]]
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):
Learjet, Inc.: Docket No. FAA-2018-0327; Product Identifier 2018-CE-
001-AD.
(a) Comments Due Date
We must receive comments by June 22, 2018.
(b) Affected ADs
None.
(c) Applicability
(1) This AD applies to the following Learjet, Inc. model
airplanes that are certificated in any category:
[GRAPHIC] [TIFF OMITTED] TP08MY18.005
(d) Subject
Joint Aircraft System Component (JASC)/Air Transport Association
(ATA) of America Code 2750, TE Flap Control System.
(e) Unsafe Condition
This AD was prompted by reports of fatigue cracks initiating in
the flap support structure due to repetitive flap loads. We are
issuing this AD to require replacement of the flap nose roller
fitting, nose roller support bracket, and adjacent rib support
structure with more robust components. The unsafe condition, if not
addressed, could cause flap nose roller support bracket failure and
allow skewed flap and aileron binding, which could result in loss of
roll control on approach with consequent loss of control.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Corrective Action
(1) For Models 28 and 29 airplanes: (i) Within the next 24
months after the effective date of this AD or within the next 400
landings after the effective date of this AD, whichever occurs
first, replace the nose roller fitting, nose roller support bracket,
and adjacent rib support structure with replacements parts following
the Accomplishment Instructions in Bombardier Learjet 28/29 Service
Bulletin (SB) 28/29-27-31 Recommended, dated September 11, 2017.
(ii) Paragraph 3.B.(1) of the applicable SB for these models
that have modified flap roller assemblies requires the operator to
contact Learjet Inc. for repair instructions, and after receiving
the repair instructions from Learjet, the operator will need to
request an AMOC as specified in paragraph (j) of this AD in order to
use the repair.
(2) For Models 31 and 31A airplanes: Within the next 24 months
after the effective date of this AD or within the next 400 landings
after the effective date of this AD, whichever occurs first, replace
the nose roller fitting, nose roller support bracket and adjacent
rib support structure with replacements parts following the
Accomplishment Instructions in Bombardier Learjet 31 SB 31-27-35
Recommended, dated September 11, 2017.
(3) For Models 35, 35A, 36, and 36A airplanes: Within the next
24 months after the effective date of this AD or within the next 400
landings after the effective date of this AD, whichever occurs
first, replace the nose roller fitting, nose roller support bracket
and adjacent rib support structure with replacements parts following
the Accomplishment Instructions in Bombardier Learjet 35/36 SB 35/
36-27-50 Recommended, dated September 11, 2017.
(4) For Models 55, 55B, and 55C airplanes: Within the next 24
months after the effective date of this AD or within the next 400
landings after the effective date of this AD, whichever occurs
first, replace the nose roller fitting, nose roller support bracket,
and adjacent rib support structure with replacements parts following
the Accomplishment Instructions in Bombardier Learjet 55 SB 55-27-41
Recommended, dated September 11, 2017.
(5) For Model 60 airplanes: Within the next 12 months after the
effective date of this AD or within the next 200 landings after the
effective date of this AD, whichever occurs first, replace the nose
roller fitting, nose roller support bracket, and adjacent rib
support structure with replacement parts following the
Accomplishment Instructions in Bombardier Learjet 60 SB 60-27-39
Recommended, Revision 1, dated January 15, 2018.
(6) For all airplanes: The compliance times in this AD are
presented in landings. If you do not keep a record of the total
number of landings, then use a 1-to-1 conversion for hours time-in-
service (TIS) to landings. Example: 20 hours TIS = 20 landings.
(7) For Models 31, 31A, 35, 35A, 36, 36A, 55, 55B, 55C, and 60
airplanes: Paragraph 3.B.(2) of the applicable SBs for these models
that have modified flap roller assemblies requires the operator to
contact Learjet Inc. for repair instructions, and after receiving
the repair instructions from Learjet, the operator will need to
request an alternative method of compliance (AMOC) as specified in
paragraph (j) of this AD in order to use the repair.
(h) Credit for Previous Actions
For Model 60 airplanes: This AD allows credit for actions
required in paragraph (g)(5) of this AD if done before the effective
date
[[Page 20743]]
of this AD following Bombardier Learjet 60 SB 60-27-39 Recommended,
Basic Issue, dated September 11, 2017.
(i) No Reporting Requirement
Although Bombardier Learjet 28/29 SB 28/29-27-31 Recommended,
dated September 11, 2017; Bombardier Learjet 31 SB 31-27-35
Recommended, dated September 11, 2017; Bombardier Learjet 35/36 SB
35/36 -27-50 Recommended, dated September 11, 2017; Bombardier
Learjet 55 SB 55-27-41 Recommended, dated September 11, 2017; and
Bombardier Learjet 60 SB 60-27-39 Recommended, Revision 1, dated
January 15, 2018, all specify to submit a compliance response form
to the manufacturer per paragraph 3.E., this AD does not require
that action.
(j) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Wichita 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 (k)(1) of this AD.
(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.
(k) Related Information
(1) For more information about this AD, contact Tara Shawn,
Aerospace Engineer, Wichita ACO Branch, 1801 Airport Road, Room 100,
Wichita, Kansas 67209; telephone: (316) 946-4141; fax: (316) 946-
4107; email: [email protected] or [email protected].
(2) For service information identified in this AD, contact
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209; telephone:
316-946-2000; email: [email protected]; internet: https://www.bombardier.com. You may review this referenced service
information at the FAA, Policy and Innovation Division, 901 Locust,
Kansas City, Missouri 64106. For information on the availability of
this material at the FAA, call (816) 329-4148.
Issued in Kansas City, Missouri, on April 30, 2018.
Melvin J. Johnson,
Deputy Director, Policy & Innovation Division, Aircraft Certification
Service.
[FR Doc. 2018-09600 Filed 5-7-18; 8:45 am]
BILLING CODE 4910-13-P
