Document ID: FAA-2017-0627-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Airbus Airplanes
Posted Date: 2017-06-30T04:00Z

[Federal Register Volume 82, Number 125 (Friday, June 30, 2017)]
[Proposed Rules]
[Pages 29795-29798]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-13780]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0627; Directorate Identifier 2017-NM-037-AD]
RIN 2120-AA64

Airworthiness Directives; Airbus Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
Airbus Model A330-200 Freighter, -200, and -300 series airplanes; and 
Airbus Model A340-200, -300, -500, and -600 series airplanes. This 
proposed AD was prompted by a report that the trimmable horizontal 
stabilizer actuator (THSA) might not function as intended after failure 
of the primary load path. This proposed AD would require repetitive 
detailed visual inspections for discrepancies of the THSA upper 
attachments and no-back housing. We are proposing this AD to address 
the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by August 14, 2017.

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 Airbus 
SAS, Airworthiness Office--EAL, 1 Rond Point Maurice Bellonte, 31707 
Blagnac Cedex, France; telephone +33 5 61 93 36 96; fax +33 5 61 93 45 
80; email airworthiness.A330-A340@airbus.com; Internet http://www.airbus.com. You may view this referenced service information at the 
FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. 
For information on the availability of this material at the FAA, call 
425-227-1221.

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-
0627; 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 proposed AD, the regulatory evaluation, any comments 
received, and other information. The street address for the Docket 
Operations office (telephone 800-647-5527) is in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Vladimir Ulyanov, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 425-227-1138; 
fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments

[[Page 29796]]

to an address listed under the ADDRESSES section. Include ``Docket No. 
FAA-2017-0627; Directorate Identifier 2017-NM-037-AD'' at the beginning 
of your comments. We specifically invite comments on the overall 
regulatory, economic, environmental, and energy aspects of this 
proposed AD. We will consider all comments received by the closing date 
and may amend this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA 
Airworthiness Directive 2017-0044, dated March 9, 2017 (referred to 
after this as the Mandatory Continuing Airworthiness Information, or 
``the MCAI''), to correct an unsafe condition for all Airbus Model 
A330-200 Freighter, -200 and -300 series airplanes; and Airbus Model 
A340-200, -300, -500, and -600 series airplanes. The MCAI states:

    The Trimmable Horizontal Stabilizer Actuator (THSA), as 
installed on A330 and A340 aeroplanes, was initially designed to 
stall when engaging on the upper secondary load path (SLP) after 
primary load path (PLP) failure. Such stall triggers system 
monitoring detection. New mission profile analysis revealed that in 
some cases, the THSA could be operated while engaged on the upper 
SLP without stalling [i.e., the THSA might not function as intended 
after failure of the primary load path]. The partial engagement of 
the SLP at upper attachment level does not trigger any indication to 
the flight crew.
    This condition, if not detected and corrected, could lead to 
THSA upper attachment failure and consequent disconnection of the 
THSA from the aeroplane structure, possibly resulting in loss of 
control of the aeroplane.
    For the reasons described above, this [EASA] AD requires 
repetitive detailed [visual] inspections (DET) of the upper THSA 
attachments parts and the PLP and SLP fuselage attachment points, 
and, depending on findings (which include, but are not limited to, 
failure of the primary load path), accomplishment of applicable 
[additional inspections for discrepancies and] corrective action(s).

    The additional inspections include a detailed visual inspection for 
discrepancies of the upper attachment fitting of the airplane and a 
detailed visual inspection for discrepancies of the removed THSA. 
Corrective actions include repair and replacement of the THSA. 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-
0627.

Related Service Information Under 1 CFR Part 51

    We reviewed the following Airbus service information:
     Airbus Service Bulletin A330-27-3218, Revision 01, dated 
December 5, 2016.
     Airbus Service Bulletin A340-27-4203, Revision 01 dated 
December 5, 2016.
     Airbus Service Bulletin A340-27-5067, Revision 01 dated 
December 5, 2016.
    The service information describes procedures for detailed visual 
inspections for discrepancies of the THSA upper attachments and no-back 
housing, additional inspections for discrepancies, and corrective 
actions. These documents are distinct since they apply to different 
airplane models. 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 and Requirements of This Proposed AD

    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, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of these 
same type designs.

Costs of Compliance

    We estimate that this proposed AD affects 102 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                   Cost on U.S.
              Action                      Labor cost           Parts cost      Cost per product      operators
----------------------------------------------------------------------------------------------------------------
Inspection.......................  3 work-hours x $85 per                $0  $255 per inspection         $26,010
                                    hour = $255 per                           cycle.
                                    inspection cycle.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary replacements 
that would be required based on the results of the proposed inspection. 
We have no way of determining the number of aircraft that might need 
this replacement.

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                   Action                                 Labor cost                Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replacement................................  20 work-hours x $85 per hour =             $734,661        $736,361
                                              $1,700.
----------------------------------------------------------------------------------------------------------------

    We have received no definitive data that would enable us to provide 
cost estimates for other on-condition actions 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.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that

[[Page 29797]]

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

    We 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. 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.

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):

Airbus: Docket No. FAA-2017-0627; Directorate Identifier 2017-NM-
037-AD.

(a) Comments Due Date

    We must receive comments by August 14, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Airbus Model A330-201, -202, -203, -223, -
223F, -243, -243F, -301, -302, -303, -321, -322, -323, -341, -342 
and -343 airplanes; and Airbus Model A340-211, -212, -213, -311, -
312, -313, -541, and -642 airplanes; certificated in any category, 
all manufacturer's serial numbers.

(d) Subject

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

(e) Reason

    This AD was prompted by a report that the trimmable horizontal 
stabilizer actuator (THSA) might not function as intended after 
failure of the primary load path. We are issuing this AD to detect 
and correct discrepancies of the THSA upper attachments and no-back 
housing, which could lead to THSA upper attachment failure and 
consequent disconnection of the THSA from the airplane structure, 
possibly resulting in loss of control of the airplane.

(f) Compliance

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

(g) Repetitive Detailed Visual Inspections

    Before exceeding the Threshold in Table 1 to paragraph (g) of 
this AD, as applicable, or within 3 months after the effective date 
of this AD, whichever occurs later; and thereafter at intervals not 
to exceed the inspection interval values defined in Table 1 to 
paragraph (g) of this AD; accomplish a detailed visual inspection 
for discrepancies of the trimmable horizontal stabilizer actuator 
(THSA) upper attachments and no-back housing, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, 
Revision 01, A340-27-4203, Revision 01, or A340-27-5067, Revision 
01, all dated December 5, 2016, as applicable. Where the 
``Threshold'' column of table 1 to paragraph (g) of this AD 
specifies compliance times in ``FH'' (flight hours) or ``FC'' 
(flight cycles), those compliance times are flight hours or flight 
cycles since the first flight of the airplane, or since the last 
accomplishment of Airbus Model A330 or A340 Maintenance Review Board 
Report task 27.40.00/07, or since the last detailed visual 
inspection of the THSA done in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A330-27-3218, A340-27-4203, 
or A340-27-5067, all dated July 1, 2016, as applicable.

   Table 1 to Paragraph (g) of This AD--THSA Upper Attachments/No-Back
                           Housing Inspections
------------------------------------------------------------------------
                              Compliance times  (whichever occurs first,
                               flight hours (FH) or  flight cycles (FC))
     Affected airplanes      -------------------------------------------
                                                     Inspection interval
                                    Threshold          (not to exceed)
------------------------------------------------------------------------
A330, A340-200 and A340-300.  Before 4,000 FH or    4,000 FH or 1,000
                               1,000 FC.             FC.
A340-500 and A340-600.......  Before 4,000 FH or    4,000 FH or 800 FC.
                               800 FC.
------------------------------------------------------------------------

(h) Additional Inspections and Corrective Actions

    (1) If, during any inspection required by paragraph (g) of this 
AD, any discrepancy identified in the Accomplishment Instructions of 
Airbus Service Bulletin A330-27-3218, Revision 01, A340-27-4203, 
Revision 01, or A340-27-5067, Revision 01, all dated December 5, 
2016, as applicable, is detected, before further flight, remove the 
THSA, and accomplish a detailed visual inspection for discrepancies 
of the upper attachment fitting of the airplane and a detailed 
visual inspection for discrepancies of the removed THSA, in 
accordance with the Accomplishment Instructions of Airbus Service 
Bulletin A330-27-3218, Revision 01, A340-27-4203, Revision 01, or 
A340-27-5067, Revision 01, all dated December 5, 2016, as 
applicable. As an alternative to the removed THSA inspections 
required by this paragraph, before further flight, replace the THSA 
with a serviceable part (as defined in paragraph (i) of this AD).
    (2) If, during any inspection of the upper attachment fitting of 
the airplane required by paragraph (h)(1) of this AD, any 
discrepancy identified in the Accomplishment Instructions of Airbus 
Service Bulletin A330-27-3218, Revision 01, A340-27-4203, Revision 
01, or A340-27-5067, Revision 01, all dated December 5, 2016, as 
applicable, is detected, before further flight, repair using a 
method approved in accordance with the procedures specified in 
paragraph (k)(2) of this AD.
    (3) If, during any inspection of the removed THSA required by 
paragraph (h)(1) of this AD, no discrepancy specified in the 
Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, 
Revision 01, A340-27-4203, Revision 01, or A340-27-5067, Revision 
01, all dated December 5, 2016, as applicable, is detected, before 
further flight, reinstall the THSA, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, 
Revision 01, A340-27-4203,

[[Page 29798]]

Revision 01, or A340-27-5067, Revision 01, all dated December 5, 
2016, as applicable.
    (4) If, during any inspection of the removed THSA required by 
paragraph (h)(1) of this AD, any discrepancy specified in the 
Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, 
Revision 01, A340-27-4203, Revision 01, or A340-27-5067, Revision 
01, all dated December 5, 2016, as applicable, is detected, before 
further flight, replace the THSA with a serviceable part (as defined 
in paragraph (i) of this AD), in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A330-27-3218, Revision 01, 
A340-27-4203, Revision 01, or A340-27-5067, Revision 01, all dated 
December 5, 2016, as applicable.

(i) Definition of Serviceable THSA

    For the purpose of this AD, a serviceable THSA is a part that 
has accumulated less than 4,000 FH or 1,000 FC (for Airbus Model 
A330, A340-200, or A340-300 airplanes) or 4,000 FH or 800 FC (for 
Airbus Model A340-500 or A340-600 airplanes), whichever occurs first 
since the first flight of the airplane, or since the last overhaul 
of the THSA, or since the last detailed visual inspection of the 
THSA in accordance with the Accomplishment Instructions of Airbus 
Service Bulletin A330-27-3218, Revision 01, A340-27-4203, Revision 
01, or A340-27-5067, Revision 01, all dated December 5, 2016, as 
applicable.

(j) Credit for Previous Actions

    This paragraph provides credit for actions required by 
paragraphs (g), (h)(1), (h)(3), and (h)(4) of this AD, if those 
actions were performed before the effective date of this AD using 
the service information specified in paragraph (j)(1), (j)(2), or 
(j)(3) of this AD.
    (1) Airbus Service Bulletin A330-27-3218, Revision 00, dated 
July 1, 2016.
    (2) Airbus Service Bulletin A340-27-4203, Revision 00, dated 
July 1, 2016.
    (3) Airbus Service Bulletin A340-27-5067, Revision 00, dated 
July, 1 2016.

(k) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Branch, ANM-116, Transport Airplane Directorate, 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 International Branch, send it to 
attention of the person identified in paragraph (l)(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 
Branch, ANM-116, Transport Airplane Directorate, FAA; or the 
European Aviation Safety Agency (EASA); or Airbus's EASA Design 
Organization Approval (DOA). If approved by the DOA, the approval 
must include the DOA-authorized signature.
    (3) Required for Compliance (RC): Except as required by 
paragraph (h)(2) of this AD: If any service information contains 
procedures or tests that are identified as RC, those procedures and 
tests must be done to comply with this AD; any procedures or tests 
that are not identified as RC are recommended. Those procedures and 
tests that are not identified as RC may be deviated from using 
accepted methods in accordance with the operator's maintenance or 
inspection program without obtaining approval of an AMOC, provided 
the procedures and tests identified as RC can be done and the 
airplane can be put back in an airworthy condition. Any 
substitutions or changes to procedures or tests identified as RC 
require approval of an AMOC.

(l) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) EASA AD 2017-044, dated March 9, 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-2017-0627.
    (2) For more information about this AD, contact Vladimir 
Ulyanov, Aerospace Engineer, International Branch, ANM-116, 
Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, 
WA 98057-3356; telephone 425-227-1138; fax 425-227-1149.
    (3) For service information identified in this AD, contact 
Airbus SAS, Airworthiness Office-EAL, 1 Rond Point Maurice Bellonte, 
31707 Blagnac Cedex, France; telephone +33 5 61 93 36 96; fax +33 5 
61 93 45 80; email airworthiness.A330-A340@airbus.com; Internet 
http://www.airbus.com. You may view this service information at the 
FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
WA. For information on the availability of this material at the FAA, 
call 425-227-1221.

    Issued in Renton, Washington, on June 22, 2017.
John P. Piccola, Jr.,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2017-13780 Filed 6-29-17; 8:45 am]
BILLING CODE 4910-13-P