Rule2023-02773
Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders
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
February 9, 2023
Effective
February 24, 2023
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Schempp-Hirth Flugzeugbau GmbH Model Duo Discus and Duo Discus T gliders. This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as cracks in the connecting tube of the elevator U-bracket of the horizontal tail, which could compromise the stiffness of the elevator control system and of the attachment of the horizontal tail. This AD requires repetitively inspecting the elevator U-bracket for cracks and broken weld seams, the rear connection between the horizontal tail and the rear attachment on the fuselage for play and softness, and the foam support for compression between the vertical and horizontal tail, and replacing or repairing damaged parts as applicable. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 88 Issue 27 (Thursday, February 9, 2023)</title>
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[Federal Register Volume 88, Number 27 (Thursday, February 9, 2023)]
[Rules and Regulations]
[Pages 8349-8352]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-02773]
========================================================================
Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 88, No. 27 / Thursday, February 9, 2023 /
Rules and Regulations
[[Page 8349]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-0162; Project Identifier MCAI-2022-01559-G;
Amendment 39-22335; AD 2023-03-10]
RIN 2120-AA64
Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
Schempp-Hirth Flugzeugbau GmbH Model Duo Discus and Duo Discus T
gliders. This AD was prompted by mandatory continuing airworthiness
information (MCAI) originated by an aviation authority of another
country to identify and correct an unsafe condition on an aviation
product. The MCAI identifies the unsafe condition as cracks in the
connecting tube of the elevator U-bracket of the horizontal tail, which
could compromise the stiffness of the elevator control system and of
the attachment of the horizontal tail. This AD requires repetitively
inspecting the elevator U-bracket for cracks and broken weld seams, the
rear connection between the horizontal tail and the rear attachment on
the fuselage for play and softness, and the foam support for
compression between the vertical and horizontal tail, and replacing or
repairing damaged parts as applicable. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective February 24, 2023.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of February 24,
2023.
The FAA must receive comments on this AD by March 27, 2023.
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-2023-0162; 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 final rule, the MCAI, 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 final rule,
contact Schempp-Hirth, Krebenstrasse 25, Kirchheim unter Teck, Germany;
phone: +49 7021 7298-0; email: <a href="/cdn-cgi/l/email-protection#2c45424a436c5f4f4449415c5c01104d0c445e494a11" http: hirth.com">hirth.com</a>">info@schempp-<a href="http://hirth.com">hirth.com</a></a>; website:
schempp-<a href="http://hirth.com">hirth.com</a>. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 901 Locust,
Kansas City, MO 64106. For information on the availability of this
material at the FAA, call (817) 222-5110. It is also available at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-0162.
FOR FURTHER INFORMATION CONTACT: Jim Rutherford, Aviation Safety
Engineer, General Aviation & Rotorcraft Section, International
Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106;
phone: (816) 329-4165; email: <a href="/cdn-cgi/l/email-protection#4a20232764383f3e222f382c25382e0a2c2b2b642d253c"><span class="__cf_email__" data-cfemail="3a50535714484f4e525f485c55485e7a5c5b5b145d554c">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this final rule. Send your comments to an address listed under
ADDRESSES. Include ``Docket No. FAA-2023-0162; Project Identifier MCAI-
2022-01559-G'' at the beginning of your comments. The most helpful
comments reference a specific portion of the final rule, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this final rule 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 final rule.
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 AD 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 AD, 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 AD. Submissions containing CBI should be sent to Jim
Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft
Section, International Validation Branch, FAA, 901 Locust, Room 301,
Kansas City, MO 64106. Any commentary that the FAA receives which is
not specifically designated as CBI will be placed in the public docket
for this rulemaking.
Background
The European Union Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union, has issued
EASA Emergency AD 2022-0242-E, dated December 7, 2022 (referred to
after this as ``the MCAI''), to correct an unsafe condition on all
Schempp-Hirth Flugzeugbau GmbH Model Arcus, Duo Discus, Duo Discus C,
Nimbus-4, Nimbus-4D, Arcus M, Arcus T, Duo Discus T, Nimbus-4M, Nimbus-
4T, Nimbus-4DM, and Nimbus-4DT gliders. The MCAI states that instances
have
[[Page 8350]]
been reported of finding cracks in the connecting tube of the elevator
U-bracket of the horizontal tail of certain gliders. The MCAI requires
a one-time inspection of the elevator U-bracket and the rear connection
between the horizontal tail and the rear attachment on the fuselage for
damage and repair or replacement of damaged parts as applicable. The
MCAI also requires amendment of the glider's applicable aircraft flight
manual (AFM).
This condition, if not detected and corrected, could lead to
failure of the elevator control system, loss of the horizontal tail
attachment, and consequent loss of glider control. You may examine the
MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-
0162.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Schempp-Hirth Flugzeugbau GmbH Working
Instructions Technical Note 396-22, 380-3, 868-24, 890-18, A532-10,
Revision 0, dated February 28, 2022 (issued as one document), which
specifies procedures for inspecting the elevator U-bracket and the rear
connection between the horizontal tail and the rear attachment on the
fuselage for damage and repairing or replacing damaged parts.
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.
FAA's Determination
These products have been approved by the aviation authority of
another country and are approved for operation in the United States.
Pursuant to the FAA's bilateral agreement with this State of Design
Authority, it has notified the FAA of the unsafe condition described in
the MCAI and service information described above. The FAA is issuing
this AD after determining that the unsafe condition described
previously is likely to exist or develop on other products of these
same type designs.
AD Requirements
This AD requires accomplishing the actions specified in the MCAI,
except as discussed under ``Differences Between this AD and the MCAI.''
Differences Between This AD and the MCAI
The MCAI applies to Schempp-Hirth Flugzeugbau GmbH Model Arcus, Duo
Discus C, Nimbus-4, Nimbus-4D, Arcus M, Arcus T, Nimbus-4M, Nimbus-4T,
Nimbus-4DM, and Nimbus-4DT gliders, and this AD does not because those
models do not have an FAA type certificate.
The MCAI requires the incorporation of revisions to the flight
manual that would instruct the pilot to inspect the horizontal tail and
elevator U-bracket during each pre-flight walk-around. In the MCAI, a
licensed mechanic performs the inspection required for those gliders
with 1,000 or more hours time-in-service (TIS) on the elevator U-
bracket as of the effective date of the MCAI. Thereafter a pilot
performs this inspection during the pre-flight walk-around. For those
gliders with less than 1,000 hours TIS on the elevator U-bracket as of
the effective date of the MCAI, the MCAI relies solely on the pilot to
perform the inspection during the pre-flight walk-around. Since the FAA
regulations do not allow a pilot to perform this type of inspection,
this AD will require the inspection to be performed by a licensed
mechanic for all gliders before further flight and thereafter at 12-
month intervals.
Justification for Immediate Adoption and Determination of the Effective
Date
Section 553(b)(3)(B) of the Administrative Procedure Act (APA) (5
U.S.C. 551 et seq.) authorizes agencies to dispense with notice and
comment procedures for rules when the agency, for ``good cause,'' finds
that those procedures are ``impracticable, unnecessary, or contrary to
the public interest.'' Under this section, an agency, upon finding good
cause, may issue a final rule without providing notice and seeking
comment prior to issuance. Further, section 553(d) of the APA
authorizes agencies to make rules effective in less than thirty days,
upon a finding of good cause.
An unsafe condition exists that requires the immediate adoption of
this AD without providing an opportunity for public comments prior to
adoption. The FAA has found that the risk to the flying public
justifies foregoing notice and comment prior to adoption of this rule
because damage in the elevator U-bracket or the rear connection between
the horizontal tail and the rear attachment on the fuselage could
happen without advanced warning and result in failure of the elevator
control system, loss of the horizontal tail attachment, and consequent
loss of glider control. Therefore, the inspection and any necessary
replacement or repair must be accomplished before further flight.
Accordingly, notice and opportunity for prior public comment are
impracticable and contrary to the public interest pursuant to 5 U.S.C.
553(b)(3)(B).
In addition, the FAA finds that good cause exists pursuant to 5
U.S.C. 553(d) for making this amendment effective in less than 30 days,
for the same reasons the FAA found good cause to forego notice and
comment.
Regulatory Flexibility Act
The requirements of the Regulatory Flexibility Act (RFA) do not
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt
a rule without prior notice and comment. Because the FAA has determined
that it has good cause to adopt this rule without prior notice and
comment, RFA analysis is not required.
Costs of Compliance
The FAA estimates that this AD affects 31 gliders of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Inspect elevator U-bracket.... 4 work-hours x Not Applicable.......... $340 per $10,540 per
$85 per hour = inspection cycle. inspection
$340. cycle.
Inspect horizontal tail 2 work-hours x Not Applicable.......... $170 per $5,270 per
attachment. $85 per hour = inspection cycle. inspection
$170. cycle.
Inspect foam compression...... 1 work-hour x $85 Not Applicable.......... $85 per $2,635 per
per hour = $85. inspection cycle. inspection
cycle.
----------------------------------------------------------------------------------------------------------------
[[Page 8351]]
The FAA estimates the following costs to do any necessary
replacement that would be required based on the results of the
inspection. The agency has no data to determine the number of gliders
that might need this replacement:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Replace elevator U-bracket.................... 2 work-hours x $85 per hour = $500 $670
$170.
Replace foam.................................. 2 work-hours x $85 per hour = 100 270
$170.
----------------------------------------------------------------------------------------------------------------
Since the repair instructions for the horizontal tail attachment
could vary significantly from glider to glider if discrepancies are
found during the inspection, the FAA has no data to determine the
number of gliders that would need follow-on actions or what the cost
per glider would be.
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
This AD will not have federalism implications under Executive Order
13132. This AD will 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 that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866, and
(2) Will not affect intrastate aviation in Alaska.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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:
2023-03-10 Schempp-Hirth Flugzeugbau GmbH: Amendment 39-22335;
Docket No. FAA-2023-0162; Project Identifier MCAI-2022-01559-G.
(a) Effective Date
This airworthiness directive (AD) is effective February 24,
2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Schempp-Hirth Flugzeugbau GmbH Model Duo
Discus and Duo Discus T gliders, all serial numbers, certificated in
any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 2730, Elevator
Control System.
(e) Unsafe Condition
This AD was prompted by mandatory continuing airworthiness
information (MCAI) originated by an aviation authority of another
country to identify and correct an unsafe condition on an aviation
product. The MCAI identifies the unsafe condition as cracks in the
connecting tube of the elevator U-bracket of the horizontal tail,
which could compromise the stiffness of the elevator control system
and of the attachment of the horizontal tail. The FAA is issuing
this AD to address this condition. The unsafe condition, if not
addressed, could result in failure of the elevator control system,
loss of the horizontal tail attachment, and consequent loss of
glider control.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Before further flight after the effective date of this AD
and thereafter at intervals not to exceed 12 months, inspect the
elevator U-bracket for indications of cracking by following
paragraphs 1.a) and 1.b) of Schempp-Hirth Flugzeugbau GmbH Working
Instructions Technical Note 396-22, 380-3, 868-24, 890-18, A532-10,
Revision 0, dated February 28, 2022 (issued as one document). For
the purposes of this AD, indications of cracking include elastic and
permanent twisting.
Note 1 to paragraph (g)(1): Technical Note Schempp-Hirth
Flugzeugbau GmbH Technical Note 396-22; and Schempp-Hirth
Flugzeugbau GmbH Technical Note 890-18; both Revision 1; both dated
October 13, 2022, contain information related to this AD.
Note 2 to paragraph (g)(1): This service information contains
German to English translation. The European Union Aviation Safety
Agency (EASA) used the English translation in referencing the
document from Schempp-Hirth Flugzeugbau GmbH. For enforceability
purposes, the FAA will refer to the Schempp-Hirth Flugzeugbau GmbH
service information in English as it appears on the document.
(i) If indications of cracking are present, remove the elevator
U-bracket and inspect it for any crack and broken weld seam by
following paragraph 1.c) of Schempp-Hirth Flugzeugbau GmbH Working
Instructions Technical Note 396-22, 380-3, 868-24, 890-18, A532-10,
Revision 0, dated February 28, 2022 (issued as one document).
(ii) If no indications of cracking are present and you do not
have suitable tools such as a mirror, flashlight, borescope, or
equivalent to do the inspection required in paragraph (g)(1)(i) of
this AD, remove the elevator U-bracket and inspect for any crack and
broken weld seam by following paragraph 1.c) of Schempp-Hirth
Flugzeugbau GmbH Working Instructions Technical Note 396-22, 380-3,
868-24, 890-18, A532-10, Revision 0, dated February 28, 2022 (issued
as one document).
(iii) If no indications of cracking are present and you have
suitable tools such as a mirror, flashlight, borescope, or
equivalent to do the inspection required in paragraph (g)(1)(i) of
this AD, inspect the elevator U-bracket for any crack and broken
weld seam by following paragraph 1.c) of Schempp-Hirth Flugzeugbau
GmbH Working Instructions Technical Note 396-22, 380-3, 868-24, 890-
18, A532-10, Revision 0, dated February 28, 2022 (issued as one
document). This inspection may be done without removing the elevator
U-bracket.
(2) If during any inspection as required by paragraph (g)(1) of
this AD, there is any crack
[[Page 8352]]
or broken weld seam in the elevator U-bracket, before further
flight, replace the elevator U-bracket by following paragraph 1.d)
of Schempp-Hirth Flugzeugbau GmbH Working Instructions Technical
Note 396-22, 380-3, 868-24, 890-18, A532-10, Revision 0, dated
February 28, 2022 (issued as one document).
(3) Before further flight after completing the actions in
paragraph (g)(1) and (2) of this AD, as applicable, and thereafter
at intervals not to exceed 12 months, rig the horizontal tail on the
fin by following paragraph 1.d) of the Schempp-Hirth Flugzeugbau
GmbH Working Instructions Technical Note 396-22, 380-3, 868-24, 890-
18, A532-10, Revision 0, dated February 28, 2022 (issued as one
document).
(4) Before further flight after completing the action in
paragraph (g)(3) of this AD, and thereafter at intervals not to
exceed 12 months, inspect for softness and play in the rear
connection between the horizontal tail and the rear attachment on
the fuselage by following paragraph 1.d) of Schempp-Hirth
Flugzeugbau GmbH Working Instructions.
Technical Note 396-22, 380-3, 868-24, 890-18, A532-10, Revision
0, dated February 28, 2022 (issued as one document). If there is
softness or play, before further flight, do the applicable
corrective actions by following paragraph 1.d) of the Schempp-Hirth
Flugzeugbau GmbH Working Instructions Technical Note 396-22, 380-3,
868-24, 890-18, A532-10, Revision 0, dated February 28, 2022 (issued
as one document). Where the service information specifies contacting
Schempp-Hirth Flugzeugbau GmbH for a repair, instead use a method
approved by the Manager, International Validation Branch, FAA; EASA;
or Schempp-Hirth Flugzeugbau GmbH's EASA Design Organization
Approval (DOA). If approved by the DOA, the approval must include
the DOA-authorized signature.
(5) Before further flight after completing the action in
paragraph (g)(4) of this AD, and thereafter at intervals not to
exceed 12 months, inspect the foam support for compression between
the vertical and horizontal tail by following paragraph 1.d) of
Schempp-Hirth Flugzeugbau GmbH Working Instructions Technical Note
396-22, 380-3, 868-24, 890-18, A532-10, Revision 0, dated February
28, 2022 (issued as one document). If the foam support has settled
to the point that it cannot be further compressed, it must be
replaced before further flight.
(h) Special Flight Permits
Special flight permits are prohibited.
(i) Alternative Methods of Compliance (AMOCs)
The Manager, International Validation Branch, FAA, has the
authority to approve AMOCs for this AD, if requested using the
procedures found in Sec. 39.19. In accordance with Sec. 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 International Validation Branch, mail
it to the address identified in paragraph (j)(2) of this AD or email
to: <a href="/cdn-cgi/l/email-protection#f0c9ddb1a6a3ddb1b9a2ddc7c3c0ddb1bdbfb3b0969191de979f86"><span class="__cf_email__" data-cfemail="c9f0e4889f9ae488809be4fefaf9e48884868a89afa8a8e7aea6bf">[email protected]</span></a>. If mailing information, also submit
information by email. 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.
(j) Additional Information
(1) Refer to EASA Emergency AD 2022-0242-E, dated December 7,
2022, for related information. This EASA Emergency AD may be found
in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-0162.
(2) For more information about this AD, contact Jim Rutherford,
Aviation Safety Engineer, General Aviation & Rotorcraft Section,
International Validation Branch, FAA, 901 Locust, Room 301, Kansas
City, MO 64106; phone: (816) 329-4165; email:
<a href="/cdn-cgi/l/email-protection#e78d8e8ac99592938f829581889583a7818686c9808891"><span class="__cf_email__" data-cfemail="e68c8f8bc89493928e839480899482a6808787c8818990">[email protected]</span></a>.
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (k)(3) and (4) of this AD.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference 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) Schempp-Hirth Flugzeugbau GmbH Working Instructions
Technical Note 396-22, 380-3, 868-24, 890-18, A532-10, Revision 0,
dated February 28, 2022 (issued as one document).
Note 1 to paragraph (k)(1)(i): This service information contains
German to English translation. EASA used the English translation in
referencing the document from Schempp-Hirth Flugzeugbau GmbH. For
enforceability purposes, the FAA will refer to the Schempp-Hirth
Flugzeugbau GmbH service information in English as it appears on the
document.
(ii) [Reserved]
(3) For service information identified in this AD, contact
Schempp-Hirth, Krebenstrasse 25, Kirchheim unter Teck, Germany;
phone: +49 7021 7298-0; email: <a href="/cdn-cgi/l/email-protection#92fbfcf4fdd2e1f1faf7ffe2e2bfaef3b2fae0f7f4af" http: hirth.com">hirth.com</a>">info@schempp-<a href="http://hirth.com">hirth.com</a></a>; website:
schempp-<a href="http://hirth.com">hirth.com</a>.
(4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 901
Locust, Kansas City, MO 64106. For information on the availability
of this material at the FAA, call (817) 222-5110.
(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, email: <a href="/cdn-cgi/l/email-protection#85e3f7abecebf6f5e0e6f1eceaebc5ebe4f7e4abe2eaf3"><span class="__cf_email__" data-cfemail="c6a0b4e8afa8b5b6a3a5b2afa9a886a8a7b4a7e8a1a9b0">[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 February 3, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2023-02773 Filed 2-8-23; 8:45 am]
BILLING CODE 4910-13-P
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This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.