Document ID: FAA-2019-0520-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems) Airplanes
Posted Date: 2019-07-02T04:00Z

[Federal Register Volume 84, Number 127 (Tuesday, July 2, 2019)]
[Proposed Rules]
[Pages 31524-31526]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-13889]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0520; Product Identifier 2019-NM-046-AD]
RIN 2120-AA64

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

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Saab AB, Saab Aeronautics Model SAAB 2000 airplanes. This 
proposed AD was prompted by reports of loose and irregular fasteners at 
the forward end of the nacelle upper longeron, where the bulkhead frame 
and struts are attached to the engine mounting structure (EMS). This 
proposed AD would require modification of the EMS and structural 
attachments. The FAA is proposing this AD to address the unsafe 
condition on these products.

DATES: The FAA must receive comments on this proposed AD by August 16, 
2019.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     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.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Saab AB, 
Saab Aeronautics, SE-581 88, Link[ouml]ping, Sweden; phone: +46 13 18 
5591; fax:

[[Page 31525]]

+46 13 18 4874; email: saab2000.techsupport@saabgroup.com; internet: 
http://www.saabgroup.com. You may view this service information at the 
FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. 
For information on the availability of this material at the FAA, call 
206-231-3195.

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-2019-
0520; 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 NPRM, the regulatory evaluation, any comments received, and other 
information. The street address for Docket Operations is listed above. 
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aerospace 
Engineer, International Section, Transport Standards Branch, FAA, 2200 
South 216th St., Des Moines, WA 98198; phone and fax: 206-231-3220.

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 the ADDRESSES section. Include ``Docket No. FAA-2019-0520; 
Product Identifier 2019-NM-046-AD'' at the beginning of your comments. 
The agency specifically invites comments on the overall regulatory, 
economic, environmental, and energy aspects of this NPRM. The agency 
will consider all comments received by the closing date and may amend 
this NPRM because of those comments.
    The FAA will post all comments we receive, without change, to 
http://www.regulations.gov, including any personal information you 
provide. The agency will also post a report summarizing each 
substantive verbal contact we receive about this NPRM.

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA AD 
2019-0054, dated March 18, 2019 (referred to after this as the 
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to 
correct an unsafe condition for certain Saab AB, Saab Aeronautics Model 
SAAB 2000 airplanes. The MCAI states:

    Occurrences have been reported where, during maintenance, loose 
and irregular fasteners were found at the forward end of the nacelle 
upper longeron, where the bulkhead frame and struts are attached to 
the engine mounting structure (EMS). Investigation results indicate 
a potential risk for significant reduction of the safety margins.
    This condition, if not corrected, could cause development of 
cracks in the EMS, leading to failure of the affected engine mount-
to-aeroplane structural connection, possibly resulting in 
significant airframe vibrations and detrimental effects on the 
surrounding pylon/nacelle structure, compromising its integrity.
    To address this potential unsafe condition, SAAB designed a 
repair and issued the SB [Saab Service Bulletin 2000-54-036, 
Revision 02, dated January 18, 2019] to provide instructions to 
install that repair as preventive modification.
    For the reason described above, this [EASA] AD requires 
modification of the EMS and attachments.

    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-2019-
0520.

Related Service Information Under 1 CFR Part 51

    Saab has issued Service Bulletin 2000-54-036, Revision 02, dated 
January 18, 2019. This service information describes procedures for 
modification of the EMS and structural attachments. 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.

FAA's Determination

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, the FAA 
has been notified of the unsafe condition described in the MCAI and 
service information referenced above. The agency is proposing this AD 
because we evaluated all the relevant information and determined the 
unsafe condition described previously is likely to exist or develop on 
other products of the same type design.

Proposed Requirements of This NPRM

    This proposed AD would require accomplishing the actions specified 
in the service information described previously.

Costs of Compliance

    The FAA estimates that this proposed AD affects 11 airplanes of 
U.S. registry. The agency estimates the following costs to comply with 
this proposed AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
256 work-hours x $85 per hour = $21,760......................          $2,500          $24,260         $266,860
----------------------------------------------------------------------------------------------------------------

    The FAA has received no definitive data that would enable us to 
provide cost estimates for the on-condition repairs specified in this 
proposed AD.

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.
    This proposed 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 of ADs is normally a function of the Compliance

[[Page 31526]]

and Airworthiness Division, but during this transition period, the 
Executive Director has delegated the authority to issue ADs applicable 
to transport category airplanes and associated appliances to the 
Director of the System Oversight Division.

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) 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 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.

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab 
Aerosystems): Docket No. FAA-2019-0520; Product Identifier 2019-NM-
046-AD.

(a) Comments Due Date

    We must receive comments by August 16, 2019.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Saab AB, Saab Aeronautics (formerly known as 
Saab AB, Saab Aerosystems) Model SAAB 2000 airplanes, certificated 
in any category, all serial numbers, except serial numbers 006, 043, 
056, and 061.

(d) Subject

    Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.

(e) Reason

    This AD was prompted by reports of loose and irregular fasteners 
at the forward end of the nacelle upper longeron, where the bulkhead 
frame and struts are attached to the engine mounting structure 
(EMS). The FAA is issuing this AD to address loose and irregular 
fasteners of the EMS which could cause development of cracks in the 
EMS, leading to failure of the affected engine mount-to-airplane 
structural connection, possibly resulting in significant airframe 
vibrations and detrimental effects on the surrounding pylon/nacelle 
structure, and loss of structural integrity.

(f) Compliance

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

(g) Modification of the EMS

    Within 3,000 flight hours or 24 months, whichever occurs first 
after the effective date of this AD, modify the EMS and structural 
attachments, in accordance with the Accomplishment Instructions of 
Saab Service Bulletin 2000-54-036, Revision 02, dated January 18, 
2019. Where Saab Service Bulletin 2000-54-036, Revision 02, dated 
January 18, 2019, specifies to contact Saab for appropriate action: 
Before further flight, accomplish corrective actions in accordance 
with the procedures specified in paragraph (i)(2) of this AD.

(h) Credit for Previous Actions

    This paragraph provides credit for actions required by paragraph 
(g) of this AD, if those actions were performed before the effective 
date of this AD using Saab Service Bulletin 2000-54-036, dated 
November 6, 2018; or Saab Service Bulletin 2000-54-036, Revision 01, 
dated January 7, 2019.

(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 AD 2019-0054, dated March 18, 2019, 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-2019-0520.
    (2) For more information about this AD, contact Shahram 
Daneshmandi, Aerospace Engineer, International Section, Transport 
Standards Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; 
phone and fax: 206-231-3220.
    (3) For service information identified in this AD, contact Saab 
AB, Saab Aeronautics, SE-581 88, Link[ouml]ping, Sweden; phone: +46 
13 18 5591; fax: +46 13 18 4874; email: 
saab2000.techsupport@saabgroup.com; internet: http://www.saabgroup.com. You may view this service information at the FAA, 
Transport Standards Branch, 2200 South 216th St., Des Moines, WA. 
For information on the availability of this material at the FAA, 
call 206-231-3195.

    Issued in Des Moines, Washington, on June 21, 2019.
Dionne Palermo,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2019-13889 Filed 7-1-19; 8:45 am]
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