Airworthiness Directive

ID: 2017-21-05
Issue date: 2017-10-23
Effective date: 2017-11-27
Subject: 10/23/2017
Source: FAA
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Saab AB, Saab Aeronautics (Formerly Known as Saab AB,

2017-21-05

[Federal Register Volume 82, Number 203 (Monday, October 23, 2017)]
[Rules and Regulations]
[Pages 48917-48919]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-22562]

––––––––––––––––––––––––––––––––––

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0563; Product Identifier 2017-NM-021-AD; Amendment 39-19076; AD
2017-21-05]

RIN 2120-AA64

Airworthiness Directives; Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab
Aerosystems) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT).

ACTION: Final rule.

––––––––––––––––––––––––––––––––––

Summary:
We are adopting a new airworthiness directive (AD) for certain Saab AB, Saab
Aeronautics Model 340A (SAAB/SF340A) and SAAB 340B airplanes. This AD was prompted by
the determination that new inspection tasks for the drag brace support fitting of the main landing gear
(MLG) and corrosion prevention and control program (CPCP) related tasks are necessary. This AD
requires revising the maintenance or inspection program, as applicable, to incorporate airworthiness
limitations, including new inspection tasks for the drag brace support fitting of the MLG and to
implement CPCP related tasks. We are issuing this AD to address the unsafe condition on these
products.

Dates:
This AD is effective November 27, 2017.
The Director of the Federal Register approved the incorporation by reference of a certain
publication listed in this AD as of November 27, 2017.

Addresses:
For service information identified in this final rule, contact Saab AB, Saab
Aeronautics, SE-581 88, Linköping, Sweden; telephone +46 13 18 5591; fax +46 13 18 4874; email
saab340techsupport@saabgroup.com; Internet http://www.saabgroup.com. You may view this
referenced service information at the FAA, Transport Standards Branch, 1601 Lind Avenue SW.,
Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. It is
also available on the Internet at http://www.regulations.gov by searching for and locating Docket No.
FAA-2017-0563.




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Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.gov by searching for
and locating Docket No. FAA-2017-0563; or in person at the Docket Management Facility between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD,
the regulatory evaluation, any comments received, and other information. The street address for the
Docket Office (telephone 800-647-5527) is Docket Management Facility, U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aerospace Engineer,
International Section, Transport Standards Branch, FAA, 1601 Lind Avenue SW., Renton, WA
98057-3356; telephone: 425-227-1112; fax: 425-227-1149.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD
that would apply to certain Saab AB, Saab Aeronautics Model 340A (SAAB/SF340A) and SAAB
340B airplanes. The NPRM published in the Federal Register on June 21, 2017 (82 FR 28271) (“the
NPRM”).
The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member
States of the European Union, has issued EASA Airworthiness Directive 2017-0033, dated February
17, 2017 (referred to after this as the Mandatory Continuing Airworthiness Information, or “the
MCAI”), to correct an unsafe condition for all Saab AB, Saab Aeronautics Model 340A
(SAAB/SF340A) and SAAB 340B airplanes. The MCAI states:

The airworthiness limitations and/or certification maintenance instructions for SAAB
SF340A and 340B, which are approved by EASA, are currently defined and published
in the SAAB SF340A and 340B Airworthiness Limitation Manual (ALM). These
instructions have been identified as mandatory for continued airworthiness.

Failure to accomplish these instructions could result in an unsafe condition [reduced
structural integrity of the airplane].

Recently, Saab AB, Aeronautics issued SAAB SF340A and 340B ALM Revision 1,
mainly to add new inspection tasks for the Main Landing Gear drag brace support
fitting, and to implement Corrosion Prevention and Control Program related tasks.

You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by
searching for and locating Docket No. FAA-2017-0563.

Comments

We gave the public the opportunity to participate in developing this AD. The following presents
the comment received on the NPRM and the FAA's response.

Request To Clarify the Reason for the NPRM

Silver Airways requested clarification of the need for an AD. Silver Airways stated that the
proposed requirements are already covered by the airworthiness limitation manual.

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We agree that clarification is necessary. Once an aircraft is produced under a type certificate, the
type design of that particular aircraft is fixed in time. Under 14 CFR 21.31(c), the airworthiness
limitation section (ALS) is part of a product's type design. In order to require a revision to an ALS for
in-service aircraft, the FAA issues an AD under notice and comment rulemaking procedures in
accordance with the Administrative Procedure Act (APA). Therefore, an AD is necessary to mandate
the airworthiness limitations in SAAB 340 Airworthiness Limitation Manual, Revision 1, dated
December 1, 2016, including inspection tasks for the drag brace support fitting of the MLG and
CPCP related tasks. We have not changed this AD in this regard.

Conclusion

We reviewed the relevant data, considered the comment received, and determined that air safety
and the public interest require adopting this AD as proposed. We have determined that these minor
changes:
• Are consistent with the intent that was proposed in the NPRM for correcting the unsafe
condition; and
• Do not add any additional burden upon the public than was already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

Saab AB, Saab Aeronautics has issued SAAB 340 Airworthiness Limitation Manual, Revision 1,
dated December 1, 2016. This service information describes airworthiness limitations, including
inspection tasks for the drag brace support fitting of the MLG and CPCP related tasks. This service
information is reasonably available because the interested parties have access to it through their
normal course of business or by the means identified in the ADDRESSES section.

Costs of Compliance

We estimate that this AD affects 87 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:

Estimated Costs
Action Labor cost Parts Cost per Cost on U.S.
cost product operators
Revision of the airplane 1 work-hour × $85 $0 $85 $7,395
maintenance or inspection program per hour = $85

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety.
Subtitle I, section 106, describes the authority of the FAA Administrator. “Subtitle VII: Aviation
Programs,” describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in “Subtitle VII, Part A, Subpart
III, Section 44701: General requirements.” Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices,
methods, and procedures the Administrator finds necessary for safety in air commerce. This
regulation is within the scope of that authority because it addresses an unsafe condition that is likely
to exist or develop on products identified in this rulemaking action.
This AD is issued in accordance with authority delegated by the Executive Director, Aircraft
Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance

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of ADs is normally a function of the Compliance and Airworthiness Division, but during this
transition period, the Executive Director has delegated the authority to issue ADs applicable to
transport category airplanes to the Director of the System Oversight Division.

Regulatory Findings

We determined that 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. Is not a “significant rule” under the DOT Regulatory Policies and Procedures (44 FR 11034,
February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. Will not have a significant economic impact, positive or negative, on a substantial number of
small entities under the criteria of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Adoption of 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

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

§ 39.13 [Amended]

2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD):




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AIRWORTHINESS
FAA DIRECTIVE
Aviation Safety
www.faa.gov/aircraft/safety/alerts/
www.gpoaccess.gov/fr/advanced.html


2017-21-05 Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems):
Amendment 39-19076; Docket No. FAA-2017-0563; Product Identifier 2017-NM-021-AD.

(a) Effective Date

This AD is effective November 27, 2017.

(b) Affected ADs

None.

(c) Applicability

This AD applies to Saab AB, Saab Aeronautics (formerly known as Saab AB, Saab
Aerosystems) Model 340A (SAAB/SF340A) and SAAB 340B airplanes, certificated in any category,
with an original certificate of airworthiness or original export certificate of airworthiness that was
issued on or before December 1, 2016.

(d) Subject

Air Transport Association (ATA) of America Code 05, Time Limits/Maintenance Checks.

(e) Reason

This AD was prompted by the determination that new inspection tasks for the drag brace support
fitting of the main landing gear (MLG) and corrosion prevention and control program (CPCP) related
tasks are necessary. We are issuing this AD to prevent reduced structural integrity of the airplane.

(f) Compliance

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

(g) Maintenance or Inspection Program Revision

Within 30 days after the effective date of this AD: Revise the maintenance or inspection
program, as applicable, to incorporate airworthiness limitations, including inspection tasks for the
drag brace support fitting of the MLG and CPCP related tasks, specified in SAAB 340 Airworthiness
Limitation Manual, Revision 1, dated December 1, 2016. The compliance time for the initial
airworthiness limitation tasks is at the applicable compliance time specified in SAAB 340
Airworthiness Limitation Manual, Revision 1, dated December 1, 2016, or within 30 days after the
effective date of this AD, whichever occurs later.

(h) No Alternative Actions, Intervals, Critical Design Configuration Control Limitations
(CDCCLs)

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After the maintenance or inspection program, as applicable, has been revised as required by
paragraph (g) of this AD, no alternative actions (e.g., inspections), intervals, and/or CDCCLs may be
used unless the actions, intervals, and/or CDCCLs are approved as an alternative method of
compliance (AMOC) in accordance with the procedures specified in paragraph (i)(1) of this AD.

(i) Other FAA AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, International Section,
Transport Standards 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 International Section, send it to the attention of the person identified in
paragraph (j)(2) of this AD. Information may be emailed to: 9-ANM-116-AMOC-
REQUESTS@faa.gov. 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.
(2) Contacting the
Manufacturer:
For any requirement in this AD to obtain corrective actions
from a manufacturer, the action must be accomplished using a method approved by the Manager,
International Section, Transport Standards Branch, FAA; or the European Aviation Safety Agency
(EASA); or Saab AB, Saab Aeronautics' EASA Design Organization Approval (DOA). If approved
by the DOA, the approval must include the DOA-authorized signature.

(j) Related Information

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA Airworthiness
Directive 2017-0033, dated February 17, 2017, for related information. This MCAI may be found in
the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket
No. FAA-2017-0563.
(2) For more information about this AD, contact Shahram Daneshmandi, Aerospace Engineer,
International Section, ANM-116, Transport Standards Branch, FAA, 1601 Lind Avenue SW.,
Renton, WA 98057-3356; telephone: 425-227-1112; fax: 425-227-1149.

(k) 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 this AD specifies otherwise.
(i) SAAB 340 Airworthiness Limitation Manual, Revision 1, dated December 1, 2016.
(ii) Reserved.
(3) For service information identified in this AD, contact Saab AB, Saab Aeronautics, SE-581
88, Linköping, Sweden; telephone +46 13 18 5591; fax +46 13 18 4874; email
saab340techsupport@saabgroup.com; Internet http://www.saabgroup.com.
(4) You may view this service information at the FAA, Transport Standards Branch, 1601 Lind
Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-
227-1221.
(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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.


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Issued in Renton, Washington, on October 11, 2017.
Dionne Palermo,
Acting Director, System Oversight Division,
Aircraft Certification Service.




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This is a partial extract of the full document - please refer to the actual report for full information.
Sources as credited.