
[Federal Register Volume 88, Number 177 (Thursday, September 14, 2023)]
[Rules and Regulations]
[Pages 63009-63011]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-19899]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1215; Project Identifier MCAI-2023-00196-T; 
Amendment 39-22528; AD 2023-17-02]
RIN 2120-AA64


Airworthiness Directives; Saab AB, Support and Services (Formerly 
Known as Saab AB, Saab Aeronautics) 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 
certain Saab AB, Support and Services Model 340A (SAAB/SF340A) and SAAB 
340B airplanes. This AD was prompted by reports of a high number of 
events related to stall warnings upon landing, following introduction 
of the ice speed function within the stall warning system. This AD 
requires modification of the stall warning/identification system, as 
specified in a European Union Aviation Safety Agency (EASA) AD, which 
is incorporated by reference. The FAA is issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective October 19, 2023.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of October 19, 
2023.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2023-1215; 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 mandatory continuing airworthiness 
information (MCAI), 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:
     For EASA material incorporated by reference in this AD, 
contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone 
+49 221 8999 000; email [email protected]; website easa.europa.eu. You 
may find this material on the EASA website at ad.easa.europa.eu.
     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. It is also available in the AD 
docket at regulations.gov under Docket No. FAA-2023-1215.

FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aviation Safety 
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 206-231-3220; email [email protected].

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 certain SAAB/SF340A and 
SAAB 340B airplanes. The NPRM published in the Federal Register on June 
20, 2023 (88 FR 39794). The NPRM was prompted by AD 2022-0216R1, dated 
February 1, 2023; corrected February 2, 2023, issued by EASA, which is 
the Technical Agent for the Member States of the European Union (EASA 
AD 2022-0216R1) (also referred to as the MCAI). The MCAI states that 
following the introduction of the ice speed function within the SAAB 
340 stall warning system, a high number of events have been reported 
related to stall warnings upon landing. Subsequent investigation 
determined that the margin to stall warning is lower when ice speed is 
ON than with ice speed OFF. This condition, if not corrected, could 
lead to inappropriate stall warnings during the landing phase and 
result in increased pilot workload during a critical phase of flight.
    In the NPRM, the FAA proposed to require accomplishing the actions 
specified in EASA AD 2022-0216R1, except for any differences identified 
as exceptions in the regulatory text of this AD. The FAA is issuing 
this AD to address the unsafe condition on these products.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-1215.

[[Page 63010]]

Discussion of Final Airworthiness Directive

Comments

    The FAA received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    This product has been approved by the aviation authority of another 
country and is 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 
referenced above. The FAA reviewed the relevant data and determined 
that air safety requires adopting this AD as proposed. Accordingly, the 
FAA is issuing this AD to address the unsafe condition on this product. 
Except for minor editorial changes, this AD is adopted as proposed in 
the NPRM. None of the changes will increase the economic burden on any 
operator.

Related Service Information Under 1 CFR Part 51

    EASA AD 2022-0216R1 specifies procedures for modifying the stall 
warning/identification system to introduce an ice speed cancel logic. 
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 ADDRESSES.

Costs of Compliance

    The FAA estimates that this AD affects 79 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
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           Labor cost              Parts cost          Cost per product             Cost on U.S. operators
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Up to 30 work-hours x $85 per            $7,900  Up to $10,450..............  Up to $825,550.
 hour = $2,550.
----------------------------------------------------------------------------------------------------------------

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,
    (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:

2023-17-02 Saab AB, Support and Services (Formerly Known as Saab AB, 
Saab Aeronautics): Amendment 39-22528; Docket No. FAA-2023-1215; 
Project Identifier MCAI-2023-00196-T.

(a) Effective Date

    This airworthiness directive (AD) is effective October 19, 2023.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Saab AB, Support and Services (formerly known 
as Saab AB, Saab Aeronautics) Model 340A (SAAB/SF340A) and SAAB 340B 
airplanes, certificated in any category, as identified in European 
Union Aviation Safety Agency (EASA) AD 2022-0216R1, dated February 
1, 2023; corrected February 2, 2023 (EASA AD 2022-0216R1).

(d) Subject

    Air Transport Association (ATA) of America Code 27, Flight 
controls.

(e) Unsafe Condition

    This AD was prompted by reports of a high number of events 
related to stall warnings upon landing, following introduction of 
the ice speed function within the stall warning system. The FAA is 
issuing this AD to address a margin to stall warning that is lower 
when ice speed is ON than with ice speed OFF. The unsafe condition, 
if not addressed, could lead to inappropriate stall warnings during 
the landing phase and result in increased pilot workload during a 
critical phase of flight.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, EASA AD 2022-0216R1.

(h) Exceptions to EASA AD 2022-0216R1

    (1) Where EASA AD 2022-0216R1 refers to November 16, 2022 (the 
effective date of EASA AD 2022-0216), this AD requires using the 
effective date of this AD.
    (2) The ``Remarks'' section of EASA AD 2022-0216R1 does not 
apply to this AD.

(i) Additional AD Provisions

    The following provisions also apply to this AD:
    (1) 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 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 International 
Validation Branch, send

[[Page 63011]]

it to the attention of the person identified in paragraph (j) of 
this AD. Information may be emailed to: [email protected]. 
Before using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
responsible Flight Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, International 
Validation Branch, FAA; or EASA; or Saab AB, Support and Services' 
EASA Design Organization Approval (DOA). If approved by the DOA, the 
approval must include the DOA-authorized signature.

(j) Additional Information

    For more information about this AD, contact Shahram Daneshmandi, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 206-231-3220; email 
[email protected].

(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 this AD specifies otherwise.
    (i) European Union Aviation Safety Agency (EASA) AD 2022-0216R1, 
dated February 1, 2023; corrected February 2, 2023.
    (ii) [Reserved]
    (3) For EASA AD 2022-0216R1, contact EASA, Konrad-Adenauer-Ufer 
3, 50668 Cologne, Germany; telephone +49 221 8999 000; email 
[email protected]; website easa.europa.eu. You may find this EASA 
AD on the EASA website at ad.easa.europa.eu.
    (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 material that is incorporated by reference 
at the National Archives and Records Administration (NARA). For 
information on the availability of this material at NARA, email 
[email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on August 17, 2023.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-19899 Filed 9-13-23; 8:45 am]
BILLING CODE 4910-13-P


