Rule2024-21112
Airworthiness Directives; Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) 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
September 17, 2024
Effective
October 22, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for Textron Aviation Inc. (Textron) (type certificate previously held by Cessna Aircraft Company) Model 525, 525A, and 525B airplanes with Tamarack active technology load alleviation system (ATLAS) winglets installed per Supplemental Type Certificate (STC) No. SA03842NY. This AD was prompted by a report of the potential for a failure of the ATLAS system in which a loss of load alleviation would be un-annunciated. This AD requires installing placards on the left-hand inboard edge of the Tamarack active camber surface (TACS) and revising the existing airplane flight manual (AFM) for your airplane. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 180 (Tuesday, September 17, 2024)</title>
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[Federal Register Volume 89, Number 180 (Tuesday, September 17, 2024)]
[Rules and Regulations]
[Pages 75949-75953]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-21112]
[[Page 75949]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-0470; Project Identifier AD-2023-00694-A;
Amendment 39-22800; AD 2024-15-09]
RIN 2120-AA64
Airworthiness Directives; Textron Aviation Inc. (Type Certificate
Previously Held by Cessna Aircraft Company) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
Textron Aviation Inc. (Textron) (type certificate previously held by
Cessna Aircraft Company) Model 525, 525A, and 525B airplanes with
Tamarack active technology load alleviation system (ATLAS) winglets
installed per Supplemental Type Certificate (STC) No. SA03842NY. This
AD was prompted by a report of the potential for a failure of the ATLAS
system in which a loss of load alleviation would be un-annunciated.
This AD requires installing placards on the left-hand inboard edge of
the Tamarack active camber surface (TACS) and revising the existing
airplane flight manual (AFM) for your airplane. The FAA is issuing this
AD to address the unsafe condition on these products.
DATES: This AD is effective October 22, 2024.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of October 22,
2024.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-0470; 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, any comments received, and other
information. The address for Docket Operations is U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
<bullet> For Tamarack material identified in this AD, contact
Tamarack Aerospace Group, Inc., 2021 Industrial Drive, Sandpoint, ID
83864; phone: (208) 597-4568; website: <a href="http://tamarackaero.com/customer-support">tamarackaero.com/customer-support</a>.
<bullet> You may view this material 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-2024-0470.
FOR FURTHER INFORMATION CONTACT: Anthony Caldejon, Aviation Safety
Engineer, FAA, 3960 Paramount Boulevard, Lakewood, CA 90712; phone:
(206) 231-3534; email: <a href="/cdn-cgi/l/email-protection#f899968c90979681d68ed69b99949c9d929796b89e9999d69f978e"><span class="__cf_email__" data-cfemail="90f1fee4f8fffee9bee6bef3f1fcf4f5fafffed0f6f1f1bef7ffe6">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to Textron (type
certificate previously held by Cessna Aircraft Company) Model 525,
525A, and 525B airplanes with Tamarack ATLAS winglets installed per STC
No. SA03842NY. The NPRM published in the Federal Register on March 22,
2024 (89 FR 20354). The NPRM was prompted by a report that while
accomplishing a reliability improvement program, Tamarack discovered
the potential for a failure of the ATLAS system in which a loss of load
alleviation would be un-annunciated. The manufacturer's investigation
revealed that failure of either of one of a pair of opto-isolators
within the ATLAS Control Unit (ACU) can prevent an enable signal from
being sent to the TACS Control Units (TCUs).
The ATLAS system is installed on Textron Model 525, 525A, and 525B
airplanes under STC No. SA03842NY and lessens the increased wing loads
associated with the installation of winglets. The ATLAS is designed to
detect flight conditions and modify airflow at the wing tip
accordingly. The ATLAS will draw power constantly to operate the logic
circuit and provide power to the actuators to maintain TACS position.
The TCUs include the linear electric actuators and motor
controllers that move the TACS. Since the enable signals are not
monitored after the opto-isolators, the ACU cannot detect whether the
generated signal is reaching the TCUs. The TCUs rely on the enable
signal to determine whether to respond to commands from the ACU. If one
of the opto-isolators fails, the ACU would not be able to detect that
the TCUs were not enabled and the TCUs would not respond to commands
from the ACU. Thus, the system would be operating in a mode of un-
annunciated loss of load alleviation. The flight crew would be unaware
of a malfunction of the load alleviation function of ATLAS and could
fly the airplane into conditions that exceed the limit load. In
addition, fatigue concerns could result in cracking of the airplane's
primary structure. If not addressed, this condition could result in
loss of continued safe flight and landing of the airplane.
In the NPRM, the FAA proposed to require installing placards on the
left-hand inboard edge of the TACS to enhance visibility of TACS
movement during night operations and revising the existing AFM for your
airplane to include instructions for pre-flight checks of the ATLAS
system before taxi. The FAA is issuing this AD to address the unsafe
condition on these products.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from three commenters. Two of the
commenters were individuals who supported the NPRM. The third commenter
was Tamarack. The following presents the comments received on the NPRM
from Tamarack and the FAA's response to each comment.
Request To Clarify What Prompted the NPRM
Tamarack requested that the FAA correct the SUMMARY and paragraph
(e), ``Unsafe Condition,'' which state that the NPRM was prompted by a
report of an un-annunciated failure of the ATLAS system. Tamarack
commented that this statement is not accurate because even though
Tamarack reported the design deficiency to the FAA under 14 CFR 21.3,
``Reporting of failures, malfunctions, and defects,'' there had not
been any actual failures of the ATLAS system in the fleet. Tamarack
stated that the ``Background'' section of the NPRM more accurately
explains that, while accomplishing a reliability improvement program,
Tamarack discovered the potential for a failure of the ATLAS system in
which a loss of load alleviation would be un-annunciated.
The FAA agrees to correct the language identified by the commenter
and has revised the SUMMARY and paragraph (e) of this AD accordingly.
Request To Revise ``Proposed AD Requirements in This NPRM'' Section
Tamarack requested that the FAA revise the ``Proposed AD
Requirements in This NPRM'' section of the NPRM to specify who can
accomplish the required actions. Tamarack stated that it is unclear
whether a pilot can install the
[[Page 75950]]
placards on the left-hand inboard edge of the TACS or whether the
placards must be installed by a certificated airframe and powerplant
(A&P) mechanic.
Paragraph (g) of this AD only allows a pilot to do the revision to
the AFM required by paragraph (g)(2) of this AD and does not allow a
pilot to do the installation of placards required by paragraph (g)(1)
of this AD. An FAA-certificated A&P mechanic or repair station must
install the placards on the left-hand inboard edge of the TACS. The FAA
has not revised the ``Proposed AD Requirements in This NPRM'' section
as requested by the commenter because that section of the NPRM is not
carried over into this final rule.
Request To Revise ``FAA's Determination'' Section of the NPRM
Tamarack requested that the FAA revise the ``FAA's Determination''
section of the NPRM, which states that the FAA has determined that the
unsafe condition is likely to exist or develop on other products of the
same type design. Tamarack stated that the probability of the unsafe
condition is ``remote'' and not ``likely'' and therefore using
``likely'' misrepresents the probability of the identified unsafe
condition occurring in the fleet.
The FAA disagrees. The ``FAA's Determination'' section of the NPRM
correlates to the FAA's finding under 14 CFR 39.5, which states the
conditions that must be present when the FAA issues an AD. If an unsafe
condition only exists on one product and is not likely to exist or
develop on other products of the same type design, or if there are no
other existing products of the same type design, the FAA will
accomplish corrective action through means other than an AD. The FAA's
finding under 14 CFR 39.5 is unrelated to the probability of the
failure condition described by the commenter. The FAA did not revise
this final rule regarding this issue.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting this AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. Except for the change described
previously, this AD is adopted as proposed in the NPRM.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Tamarack Aerospace Atlas Service Bulletin SBATLAS-
57-06, Issue A, dated April 19, 2023. This material specifies
procedures for installing placards on the left-hand inboard edge of the
TACS to enhance visibility of TACS movement during night operations.
The FAA also reviewed the following AFM supplements, which contain,
among other items, instructions for pre-flight checks of the ATLAS
system before taxi. These documents are distinct because they apply to
different airplane models.
<bullet> Tamarack Aerospace Cessna Citation Model 525, 525-0001
thru -0359, AFM Supplement TAG-1101-0099 CA/DD/M023, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue D, dated
September 20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Model 525, 525-0360
through -0599, AFM Supplement TAG-1101-1099 CA/DD/M037, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue D, dated
September 20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Model 525, 525-0600
through -0684 and -0686 through -0701, AFM Supplement TAG-1101-P099 CA/
DD/M038, Tamarack Active Technology Load Alleviation System (Atlas)
Winglets, Issue D, dated September 20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Model 525, 525-0685 and
-0800 and on, AFM Supplement TAG-1101-M099 CA/DD/M088, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue D, September
20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Model 525A, 525A-0001
thru -0299, AFM Supplement TAG-1102-0099 CAS/AFM0003, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue C, September
20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Model 525A, 525A-0300
and on, AFM Supplement TAG-1102-P099 CAS/AFM0004, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue C, September
20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Jet Model 525B, 525B-
0001 thru 525B-0056 and 525B-0058 thru 525B-0450, AFM Supplement TAG-
1103-0099 CAS/AFM0001, Tamarack Active Technology Load Alleviation
System (Atlas) Winglets, Issue C, September 20, 2023.
<bullet> Tamarack Aerospace Cessna Citation Jet Model 525B, 525B-
0057 and 525B-0451 and ON, AFM Supplement TAG-1103-P099 CAS/AFM0002,
Tamarack Active Technology Load Alleviation System (Atlas) Winglets,
Issue D, September 20, 2023.
This material 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.
Costs of Compliance
The FAA estimates that this AD affects 148 airplanes of U.S.
registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Install placards...................... 0.5 work-hour x $85 per $20 $62.50 $9,250
hour = $42.50.
Revise AFM............................ 1 work-hour x $85 per 0 85 12,580
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
[[Page 75951]]
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,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The 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:
2024-15-09 Textron Aviation Inc. (Type Certificate Previously Held
by Cessna Aircraft Company): Amendment 39-22800; Docket No. FAA-
2024-0470; Project Identifier AD-2023-00694-A.
(a) Effective Date
This airworthiness directive (AD) is effective October 22, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Textron Aviation Inc. (type certificate
previously held by Cessna Aircraft Company) Model 525, 525A, and
525B airplanes, all serial numbers (S/Ns), certificated in any
category, with Tamarack active technology load alleviation system
(ATLAS) winglets installed in accordance with Supplemental Type
Certificate No. SA03842NY.
(d) Subject
Joint Aircraft System Component (JASC) Code 2770, Gust Lock/
Damper System
(e) Unsafe Condition
This AD was prompted by a report of the potential for a failure
of the ATLAS system in which a loss of load alleviation would be un-
annunciated. The FAA is issuing this AD to address un-annunciated
loss of load alleviation which, if not addressed, could lead to the
flight crew flying the airplane into conditions that exceed the
limit load, as well as fatigue cracking in the airplane's primary
structure. This could result in loss of continued safe flight and
landing of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
Within 60 hours time-in-service or 6 months after the effective
date of this AD, whichever occurs first, do the actions required by
paragraphs (g)(1) and (2) of this AD.
(1) Install placards on the left-hand Tamarack active camber
surface (TACS) in accordance with steps 1 through 3 of the
Accomplishment Instructions in Tamarack Aerospace Atlas Service
Bulletin SBATLAS-57-06, Issue A, dated April 19, 2023.
(2) Revise the Normal Procedures section of the existing
airplane flight manual (AFM) for your airplane by adding the
information in Figure 1 to paragraph (g)(2) of this AD under
``Before Taxi'' or by incorporating the AFM supplement applicable to
your airplane identified in Figure 2 to paragraph (g)(2) of this AD.
Using a different document with information identical to this
information under ``Before Taxi'' in the AFM for your airplane is
acceptable for compliance with the requirements of this paragraph.
The owner/operator (pilot) holding at least a private pilot
certificate may revise the existing AFM for your airplane and must
enter compliance with the applicable paragraph of this AD into the
airplane maintenance records in accordance with 14 CFR 43.9(a) and
91.417(a)(2)(v). The record must be maintained as required by 14 CFR
91.417, 121.380, or 135.439.
Figure 1 to Paragraph (g)(2)--ATLAS Check Procedure
------------------------------------------------------------------------
------------------------------------------------------------------------
Before Taxi
WARNING
The TACS should move rapidly and forcefully trailing edge up and return
to the neutral position when the ATLAS first receives power. Be sure
that all personnel and equipment are clear before moving switch to the
ON position.
ATLAS System............................ CHECK
(Test that the ATLAS is working properly.)
a. In poor light or dark conditions, turn on left side reading light.
b. In poor light or dark conditions, turn on Wing Inspection Light.
c. ATLAS INOP Button--Press 3 times within 3 seconds. ATLAS INOP Button
light will flash 3 times when system goes through BIT
(Built In Test).
WARNING
The TACS should move rapidly and
forcefully trailing edge up and return
to the neutral position when running
the BIT function. Be sure that all
personnel and equipment are clear
before pressing.
d. TACS................................. CHECK MOVEMENT
Both TACS should rapidly move up and return to the neutral position....
i. If the TACS do not move after completing step c., this may indicate
that ATLAS is not functioning normally..
ii. Refer to Abnormal Procedure ATLAS INOPERATIVE ON THE GROUND (TACS
DO NOT MOVE IN BIT)..
e. Wait approximately 10 seconds.
f. ATLAS INOP Button light.............. CHECK OFF
g. If left side reading light is illuminated, turn off at pilot's
discretion.
h. If Wing Inspection Light is illuminated, turn off at pilot's
discretion.
NOTE
If annunciator remains illuminated, or if the TACS do not move, a fault
has been identified in the system. In either case refer to Abnormal
Procedures ATLAS INOPERATIVE ON THE GROUND.
------------------------------------------------------------------------
[[Page 75952]]
Figure 2 to Paragraph (g)(2)--Tamarack ATLAS AFM Supplements
------------------------------------------------------------------------
Model and S/N Tamarack ATLAS AFM supplement
------------------------------------------------------------------------
Model 525, S/Ns 525-0001 through 525- Paragraph 3A, ATLAS System,
0359 inclusive. under ``Before Taxiing'' in
the Normal Procedures section
of Cessna Citation Model 525,
525-0001 thru -0359, AFM
Supplement TAG-1101-0099 CA/DD/
M023, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
D, dated September 20, 2023.
Model 525, S/Ns 525-0360 through 525- Paragraph 3A, ATLAS System,
0599 inclusive. under ``Before Taxi'' in the
Normal Procedures section of
Cessna Citation Model 525, 525-
0360 thru -0599, AFM
Supplement TAG-1101-1099 CA/DD/
M037, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
D, dated September 20, 2023.
Model 525, S/Ns 525-0600 through 525- Paragraph 1A, ATLAS System,
0684 inclusive and S/Ns 525-0686 under ``Before Taxi'' in the
through 525-0701 inclusive. Normal Procedures section of
Cessna Citation Model 525, 525-
0600 through -0684 and -0686
through -0701, AFM Supplement
TAG-1101-P099 CA/DD/M038,
Tamarack Active Technology
Load Alleviation System
(Atlas) Winglets, Issue D,
dated September 20, 2023.
Model 525, S/N 525-0685 and S/Ns 525- Paragraph 9A, ATLAS System,
0800 and larger. under ``Before Taxi'' in the
Normal Procedures section of
Cessna Citation Model 525, 525-
0685 and -0800 and on, AFM
Supplement TAG-1101-M099 CA/DD/
M088, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
D, dated September 20, 2023.
Model 525A, S/Ns 525A-0001 through 525- Paragraph 3A, ATLAS System,
0299 inclusive. under ``Before Taxi'' in the
Normal Procedures section of
Cessna Citation Model 525A,
525A-0001 thru -0299, AFM
Supplement TAG-1102-0099 CAS/
AFM0003, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
C, dated September 20, 2023.
Model 525A, S/Ns 525A-0300 and larger.. Paragraph 1A, ATLAS System,
under ``Before Taxi'' in the
Normal Procedures section of
Cessna Citation Model 525A,
525A-0300 and on, AFM
Supplement TAG-1102-P099 CAS/
AFM0004, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
C, dated September 20, 2023.
Model 525B, S/Ns 525B-0001 through 525B- Paragraph 1A, ATLAS System,
0056 inclusive and S/Ns 525B-0058 under ``Before Taxi'' in the
through 525B-0450 inclusive. Normal Procedures section of
Cessna CitationJet Model 525B,
525B-0001 thru 525B-0056 and
525B-0058 thru 525B-0450, AFM
Supplement TAG-1103-0099 CAS/
AFM0001, Tamarack Active
Technology Load Alleviation
System (Atlas) Winglets, Issue
C, dated September 20, 2023.
Model 525B, S/N 525B-0057 and S/Ns 525B- Paragraph 9A, ATLAS System,
0451 and larger. under ``Before Taxi'' in the
Normal Procedures section of
Cessna CitationJet Model 525B,
525B-0057 and 525B-0451 and
ON, AFM Supplement TAG-1103-
P099 CAS/AFM0002, Tamarack
Active Technology Load
Alleviation System (Atlas)
Winglets, Issue D, dated
September 20, 2023.
------------------------------------------------------------------------
(h) Alternative Methods of Compliance (AMOCs)
(1) The Manager, West Certification 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 West Certification Branch, send it to
the attention of the person identified in paragraph (i) of this AD
and email it to <a href="/cdn-cgi/l/email-protection#94adb9d5dad9b9c7f1f5e0e0f8f1b9d5d7dbb9d5d9dbd7b9c6f1e5e1f1e7e0e7d4f2f5f5baf3fbe2"><span class="__cf_email__" data-cfemail="e0d9cda1aeadcdb3858194948c85cda1a3afcda1adafa3cdb285919585939493a0868181ce878f96">[email protected]</span></a>.
(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.
(i) Related Information
For more information about this AD, contact Anthony Caldejon,
Aviation Safety Engineer, FAA, 3960 Paramount Boulevard, Lakewood,
CA 90712; phone: (206) 231-3534; email: <a href="/cdn-cgi/l/email-protection#cdaca3b9a5a2a3b4e3bbe3aeaca1a9a8a7a2a38dabacace3aaa2bb"><span class="__cf_email__" data-cfemail="8feee1fbe7e0e1f6a1f9a1eceee3ebeae5e0e1cfe9eeeea1e8e0f9">[email protected]</span></a>.
(j) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the material listed in this paragraph
under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless the AD specifies otherwise.
(i) Tamarack Aerospace Atlas Service Bulletin SBATLAS-57-06,
Issue A, dated April 19, 2023.
(ii) Tamarack Aerospace Cessna Citation Model 525, 525-0001 thru
-0359, Airplane Flight Manual (AFM) Supplement TAG-1101-0099 CA/DD/
M023, Tamarack Active Technology Load Alleviation System (Atlas)
Winglets, Issue D, dated September 20, 2023.
(iii) Tamarack Aerospace Cessna Citation Model 525, 525-0360
thru -0599, AFM Supplement TAG-1101-1099 CA/DD/M037, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue D, dated
September 20, 2023.
(iv) Tamarack Aerospace Cessna Citation Model 525, 525-0600
through -0684 and -0686 through -0701, AFM Supplement TAG-1101-P099
CA/DD/M038, Tamarack Active Technology Load Alleviation System
(Atlas) Winglets, Issue D, dated September 20, 2023.
(v) Tamarack Aerospace Cessna Citation Model 525, 525-0685 and -
0800 and on, AFM Supplement TAG-1101-M099 CA/DD/M088, Tamarack
Active Technology Load Alleviation System (Atlas) Winglets, Issue D,
September 20, 2023.
(vi) Tamarack Aerospace Cessna Citation Model 525A, 525A-0001
thru -0299, AFM Supplement TAG-1102-0099 CAS/AFM0003, Tamarack
Active Technology Load Alleviation System (Atlas) Winglets, Issue C,
September 20, 2023.
(vii) Tamarack Aerospace Cessna Citation Model 525A, 525A-0300
and on, AFM Supplement TAG-1102-P099 CAS/AFM0004, Tamarack Active
Technology Load Alleviation System (Atlas) Winglets, Issue C,
September 20, 2023.
(viii) Tamarack Aerospace Cessna CitationJet Model 525B, 525B-
0001 thru 525B-0056 and 525B-0058 thru 525B-0450, AFM Supplement
TAG-1103-0099 CAS/AFM0001, Tamarack Active Technology Load
Alleviation System (Atlas) Winglets, Issue C, September 20, 2023.
[[Page 75953]]
(ix) Tamarack Aerospace Cessna CitationJet Model 525B, 525B-0057
and 525B-0451 and ON, AFM Supplement TAG-1103-P099 CAS/AFM0002,
Tamarack Active Technology Load Alleviation System (Atlas) Winglets,
Issue D, September 20, 2023.
(3) For Tamarack material identified in this AD, contact
Tamarack Aerospace Group, Inc., 2021 Industrial Drive, Sandpoint, ID
83864; phone: (208) 597-4568; website: <a href="http://tamarackaero.com/customer-support">tamarackaero.com/customer-support</a>.
(4) You may view this material at 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 material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="/cdn-cgi/l/email-protection#1a267b3a72687f7c27" http: www.archives.gov federal-register cfr ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="8de4efffa0e1e2eeecf9e4e2e3fee2ffe8e0ece4e1ebffa3e4e3fefde8eef9e4e2e3cde3ecffeca3eae2fb">[email protected]</span></a>"><a href="http://www.archives.gov/federal-register/cfr/ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="88e1eafaa5e4e7ebe9fce1e7e6fbe7faede5e9e1e4eefaa6e1e6fbf8edebfce1e7e6c8e6e9fae9a6efe7fe">[email protected]</span></a></a>.
Issued on September 10, 2024.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-21112 Filed 9-16-24; 8:45 am]
BILLING CODE 4910-13-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on September 17, 2024.
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