Proposed Rule2022-24419
Airworthiness Directives; Learjet, Inc., Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
November 10, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is revising a notice of proposed rulemaking (NPRM) that applied to certain Learjet, Inc., Model 45 airplanes. This action revises the NPRM by adding airplanes to the applicability. The FAA is proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these actions would impose an additional burden over that in the NPRM, the FAA is requesting comments on this SNPRM.
Full Text
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<title>Federal Register, Volume 87 Issue 217 (Thursday, November 10, 2022)</title>
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[Federal Register Volume 87, Number 217 (Thursday, November 10, 2022)]
[Proposed Rules]
[Pages 67834-67837]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-24419]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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Federal Register / Vol. 87, No. 217 / Thursday, November 10, 2022 /
Proposed Rules
[[Page 67834]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0991; Project Identifier AD-2022-00155-T]
RIN 2120-AA64
Airworthiness Directives; Learjet, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Supplemental notice of proposed rulemaking (SNPRM).
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SUMMARY: The FAA is revising a notice of proposed rulemaking (NPRM)
that applied to certain Learjet, Inc., Model 45 airplanes. This action
revises the NPRM by adding airplanes to the applicability. The FAA is
proposing this airworthiness directive (AD) to address the unsafe
condition on these products. Since these actions would impose an
additional burden over that in the NPRM, the FAA is requesting comments
on this SNPRM.
DATES: The comment period for the NPRM published in the Federal
Register on August 11, 2022 (87 FR 49556), is reopened.
The FAA must receive comments on this SNPRM by December 27, 2022.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2022-0991; 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 SNPRM, any comments received, and other
information. The street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For service information identified in this SNPRM, contact
Learjet, Inc., One Learjet Way, Wichita, KS 67209-2942; telephone 316-
946-2000; fax 316-946-2220; email <a href="/cdn-cgi/l/email-protection#4c2d2f62252f380c2d293e2362702d6c243e292a71" http: bombardier.com">bombardier.com</a>">ac.ict@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website
<a href="http://bombardier.com">bombardier.com</a>.
<bullet> You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200 South
216th St., Des Moines, WA. For information on the availability of this
material at the FAA, call 206-231-3195.
FOR FURTHER INFORMATION CONTACT: Adam Hein, Aerospace Engineer,
Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch,
1801 S Airport Road, Wichita, KS 67209; telephone (316) 946-4116;
email: <a href="/cdn-cgi/l/email-protection#2f4e4b4e4201474a46416f494e4e01484059"><span class="__cf_email__" data-cfemail="dfbebbbeb2f1b7bab6b19fb9bebef1b8b0a9">[email protected]</span></a>.
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 ADDRESSES. Include ``Docket No. FAA-2022-0991; Project Identifier
AD-2022-00155-T'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may again
revise this proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this proposed AD.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this SNPRM contain
commercial or financial information that is customarily treated as
private, that you actually treat as private, and that is relevant or
responsive to this SNPRM, it is important that you clearly designate
the submitted comments as CBI. Please mark each page of your submission
containing CBI as ``PROPIN.'' The FAA will treat such marked
submissions as confidential under the FOIA, and they will not be placed
in the public docket of this SNPRM. Submissions containing CBI should
be sent to Adam Hein, Aerospace Engineer, Mechanical Systems and
Propulsion Section, FAA, Wichita ACO Branch, 1801 S Airport Road,
Wichita, KS 67209; telephone (316) 946-4116; email: <a href="/cdn-cgi/l/email-protection#5f3e3b3e3271373a36311f393e3e71383029"><span class="__cf_email__" data-cfemail="59383d383477313c3037193f3838773e362f">[email protected]</span></a>.
Any commentary that the FAA receives that is not specifically
designated as CBI will be placed in the public docket for this
rulemaking.
Background
The FAA issued an NPRM to amend 14 CFR part 39 by adding an AD that
would apply to certain Learjet, Inc., Model 45 airplanes airplanes. The
NPRM published in the Federal Register on August 11, 2022 (87 FR
49556). The NPRM was prompted by a determination that new or more
restrictive airworthiness limitations are necessary. In the NPRM, the
FAA proposed to require revising the existing inspection program to
incorporate reduced inspection intervals for the anti-ice manifold
assembly.
Related Rulemaking
The FAA issued AD 2001-03-05, Amendment 39-12109 (66 FR 10353,
February 15, 2001) (AD 2001-03-05), for certain Learjet Model 45
airplanes. AD 2001-03-05 requires, among other actions, revising the
existing Learjet 45 maintenance program to incorporate additional
inspections and maintenance practices for the anti-ice manifold
assembly, including a 600-hour repetitive inspection interval of an
earlier design/part number of the anti-ice manifold. Since the FAA
issued AD
[[Page 67835]]
2001-03-05, the anti-ice manifold was redesigned and the inspection
interval was extended to 1,200 flight hours. The design approval holder
subsequently determined that the design improvements made to the anti-
ice manifold assembly did not fully address the original issue of vane
cracking, so the 1,200-hour inspection on the redesigned part is
insufficient. However, the FAA determined that a repetitive inspection
interval of 600 flight hours is sufficient to address the unsafe
condition. Therefore, this proposed AD would require revising the
existing inspection program to incorporate a reduced 600-hour
inspection interval for the redesigned part. Accomplishing the required
actions in this proposed AD would terminate the requirements of
paragraph (c) of AD 2001-03-05.
Actions Since the NPRM Was Issued
Since the FAA issued the NPRM, the FAA determined that the list of
affected serial numbers specified in paragraph (c) of the proposed AD
was incomplete. The FAA has determined that this proposed AD should
apply to airplanes with an original airworthiness certificate or
original export certificate of airworthiness issued on or before
January 18, 2022. Airplanes with an original airworthiness certificate
or original export certificate of airworthiness issued after January
18, 2022 must comply with the airworthiness limitations specified as
part of the approved type design and referenced on the type certificate
data sheet; this proposed AD therefore does not include those airplanes
in the applicability.
Comments
The FAA received no comments on the NPRM or on the determination of
the cost to the public.
FAA's Determination
The FAA is proposing this AD after determining the unsafe condition
described previously is likely to exist or develop in other products of
the same type design. Certain changes described above expand the scope
of the NPRM. As a result, it is necessary to reopen the comment period
to provide additional opportunity for the public to comment on this
SNPRM.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Learjet 40 Maintenance Manual Temporary Revision
(TR) 04-33 and Learjet 45 Maintenance Manual TR 04-48, both dated
January 18, 2022. This service information specifies reduced inspection
intervals for the anti-ice manifold assembly. These documents are
distinct since they apply to different airplane configurations. 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 ADDRESSES.
Proposed AD Requirements in This SNPRM
This proposed AD would require revising the existing inspection
program to incorporate reduced inspection intervals for the anti-ice
manifold assembly.
This proposed AD would require revisions to certain operator
maintenance documents to include new actions (e.g., inspections).
Compliance with these actions is required by 14 CFR 91.403(c). For
airplanes that have been previously modified, altered, or repaired in
the areas addressed by this proposed AD, the operator may not be able
to accomplish the actions described in the revisions. In this
situation, to comply with 14 CFR 91.403(c), the operator must request
approval for an alternative method of compliance according to paragraph
(k) of this proposed AD.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 481 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Inspection program revision........... 1 work-hour x $85 per $0 $85 $40,885
hour = $85.
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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.
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) Would not affect intrastate aviation in Alaska, and
(3) Would 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 67836]]
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
Learjet, Inc.: Docket No. FAA-2022-0991; Project Identifier AD-2022-
00155-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by December 27, 2022.
(b) Affected ADs
This AD affects AD 2001-03-05, Amendment 39-12109 (66 FR 10353,
February 15, 2001) (AD 2001-03-05).
(c) Applicability
This AD applies to Learjet, Inc., Model 45 (Learjet 40), Model
45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 75)
airplanes, certificated in any category, with an original
airworthiness certificate or original export certificate of
airworthiness issued on or before January 18, 2022.
(d) Subject
Air Transport Association (ATA) of America Code 36, Pneumatic.
(e) Unsafe Condition
This AD was prompted by a determination that new or more
restrictive airworthiness limitations are necessary. The FAA is
issuing this AD to address metal fragments breaking off the anti-ice
manifold assembly due to fatigue, which could block a duct in the
anti-ice system and result in an unannunciated loss of ice
protection and subsequent loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Maintenance or Inspection Program Revision
(1) For Learjet 40 and 45 variants: Within 60 days after the
effective date of this AD, revise the existing inspection program by
incorporating the information in Learjet 40 Maintenance Manual
Temporary Revision (TR) 04-33 or Learjet 45 Maintenance Manual TR
04-48, both dated January 18, 2022, as applicable. The initial
compliance time for the inspection is at the applicable time
specified in paragraph (g)(1)(i) or (ii) of this AD.
(i) For airplanes with more than 600 flight hours since the most
recent inspection of the anti-ice manifold assembly was performed as
of the effective date of this AD: Do the inspection within 100
flight hours or 60 days after the effective date of this AD,
whichever occurs first.
(ii) For airplanes with 600 flight hours or less since the most
recent inspection of the anti-ice manifold assembly was performed as
of the effective date of this AD: Do the inspection within 600
flight hours after the most recent inspection or within 100 flight
hours after the effective date of this AD, whichever occurs later.
(2) For Learjet 70 and 75 variants: Within 60 days after the
effective date of this AD, revise the existing inspection program to
incorporate the information identified in figure 1 to paragraph
(g)(2) of this AD. The initial compliance time for the inspection is
at the applicable time specified in paragraph (g)(2)(i) or (ii) of
this AD.
[GRAPHIC] [TIFF OMITTED] TP10NO22.000
(i) For airplanes with more than 600 flight hours since the most
recent inspection of the anti-ice manifold assembly was performed as
of the effective date of this AD: Do the inspection within 100
flight hours or 60 days after the effective date of this AD,
whichever occurs first.
(ii) For airplanes with 600 flight hours or less since the most
recent inspection of the anti-ice manifold assembly was performed as
of the effective date of this AD: Do the inspection within 600
flight hours after the most recent inspection or within 100 flight
hours after the effective date of this AD, whichever occurs later.
(h) No Alternative Actions or Intervals
After the existing inspection program has been revised as
required by paragraph (g) of this AD, no alternative actions (e.g.,
inspections) or intervals, may be used unless the actions and
intervals are approved as an alternative method of compliance (AMOC)
in accordance with the procedures specified in paragraph (k) of this
AD.
(i) Terminating Action for Paragraph (c) of AD 2001-03-05
Accomplishing the revision of the existing inspection program
required by paragraph (g) of this AD terminates the requirements of
paragraph (c) of AD 2001-03-05.
(j) Special Flight Permit
Special flight permits may be issued in accordance with 14 CFR
21.197 and 21.199 to operate the airplane to a location where the
airplane can be inspected, provided the airplane is restricted from
flying into known icing conditions.
(k) 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 responsible Flight Standards Office,
as appropriate. If sending information directly to the manager of
the certification office, send it to the attention of the person
identified in paragraph (l) of this AD.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards Office.
(l) Related Information
For more information about this AD, contact Adam Hein, Aerospace
Engineer, Mechanical Systems and Propulsion Section, FAA, Wichita
ACO Branch, 1801 S Airport Road, Wichita, KS 67209; telephone (316)
946-4116; email: <a href="/cdn-cgi/l/email-protection#98f9fcf9f5b6f0fdf1f6d8fef9f9b6fff7ee"><span class="__cf_email__" data-cfemail="a8c9ccc9c586c0cdc1c6e8cec9c986cfc7de">[email protected]</span></a>.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Learjet 40 Maintenance Manual Temporary Revision 04-33,
dated January 18, 2022.
(ii) Learjet 45 Maintenance Manual Temporary Revision 04-48,
dated January 18, 2022.
(3) For service information identified in this AD, contact
Learjet, Inc., One Learjet Way, Wichita, KS 67209-2942; telephone
316-946-2000; fax 316-946-2220; email <a href="/cdn-cgi/l/email-protection#7110125f181205311014031e5f4d1051190314174c" http: bombardier.com">bombardier.com</a>">ac.ict@aero.<a href="http://bombardier.com">bombardier.com</a></a>;
website <a href="http://bombardier.com">bombardier.com</a>.
[[Page 67837]]
(4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200
South 216th St., Des Moines, WA. For information on the availability
of this material at the FAA, call 206-231-3195.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, <a href="/cdn-cgi/l/email-protection#c7a1b5e9aea9b4b7a2a4b3aea8a987a9a6b5a6e9a0a8b1"><span class="__cf_email__" data-cfemail="9dfbefb3f4f3eeedf8fee9f4f2f3ddf3fceffcb3faf2eb">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on November 1, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-24419 Filed 11-9-22; 8:45 am]
BILLING CODE 4910-13-P
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