Document ID: FAA-2008-0342-0001
Agency: faa
Document Type: Rule
Title: Airworthiness Directives; Airbus Model A318, A319, A320, and A321 Series Airplanes
Posted Date: 2008-03-25T04:00Z

[Federal Register: March 25, 2008 (Volume 73, Number 58)]
[Proposed Rules]               
[Page 15681-15682]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr25mr08-13]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0342; Directorate Identifier 2007-NM-305-AD]
RIN 2120-AA64

 
Airworthiness Directives; Airbus Model A318, A319, A320, and A321 
Series 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 the 
products listed above. This proposed AD results from mandatory 
continuing airworthiness information (MCAI) originated by an aviation 
authority of another country to identify and correct an unsafe 
condition on an aviation product. The MCAI describes the unsafe 
condition as:

    During planned maintenance visit on one A320 aircraft, a cross 
connection of the fire extinguishing circuit system was identified. 
In case of fire, this cross connection will activate (discharge) the 
wrong forward or aft cargo compartment fire extinguisher bottle.

    Failure to activate the correct bottle when required is 
classified as potentially catastrophic.

* * * * *
The proposed AD would require actions that are intended to address the 
unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by April 24, 2008.

ADDRESSES: You may send comments 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: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New 
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Operations office 
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: Tim Dulin, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 
227-2141; 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 to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2008-0342; 
Directorate Identifier 2007-NM-305-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 Community, has issued EASA 
Airworthiness Directive 2008-0249, dated September 24, 2007 (referred 
to after this as ``the MCAI''), to correct an unsafe condition for the 
specified products. The MCAI states:

    During planned maintenance visit on one A320 aircraft, a cross 
connection of the fire extinguishing circuit system was identified. 
In case of fire, this cross connection will activate (discharge) the 
wrong forward or aft cargo compartment fire extinguisher bottle.

    Failure to activate the correct bottle when required is 
classified as potentially catastrophic.

    For the reasons described above, this AD requires a one-time 
inspection and check of the cargo firing circuit continuity to 
confirm the correct connection of the dedicated wires between the 
discharge pushbutton switches and the relevant cargo bottle.

    Corrective action includes modifying the wiring connection on plug 
1505VC-A. You may obtain further information by examining the MCAI in 
the AD docket.

Relevant Service Information

    Airbus has issued Service Bulletin A320-26A1068, Revision 01, dated 
July 19, 2007. The actions described in this service information are 
intended to correct the unsafe condition identified in the MCAI.

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 the same 
type design.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a NOTE within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 679 products of U.S. registry. We also estimate that 
it would take about 6 work-hours per product to comply with the basic 
requirements of this proposed AD. The average labor rate is $80 per 
work-hour. Based on these figures, we estimate the cost of the proposed 
AD on U.S. operators to be $325,920, or $480 per product.

[[Page 15682]]

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.

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); 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, 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

    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]

    2. The FAA amends Sec.  39.13 by adding the following new AD:

Airbus: Docket No. FAA-2008-0342; Directorate Identifier 2007-NM-
305-AD.

Comments Due Date

    (a) We must receive comments by April 24, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Airbus Model A318, A319, A320, and A321 
series airplanes, certificated in any category, all certified 
models; all serial numbers which have received an original French 
standard airworthiness certificate or original French export 
certificate of airworthiness prior to February 28, 2007, and have 
been fitted with a cargo compartment fire extinguisher bottle 
installed in production, or in service by an Airbus Service 
Bulletin; except airplanes on which Airbus (MRBR) Maintenance Review 
Board Report Task 26.23.00/03 or 26.23.00/07 has been performed.

Subject

    (d) Air Transport Association (ATA) of America Code 26: Fire 
Protection.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    During planned maintenance visit on one A320 aircraft, a cross 
connection of the fire extinguishing circuit system was identified. 
In case of fire, this cross connection will activate (discharge) the 
wrong forward or aft cargo compartment fire extinguisher bottle.

    Failure to activate the correct bottle when required is 
classified as potentially catastrophic.

    For the reasons described above, this AD requires a one-time 
inspection and check of the cargo firing circuit continuity to 
confirm the correct connection of the dedicated wires between the 
discharge pushbutton switches and the relevant cargo bottle.

    Corrective action includes modifying the wiring connection on 
plug 1505VC-A.

Actions and Compliance

    (f) Within 600 flight hours after the effective date of this AD, 
unless already done, perform the inspection and continuity check of 
the cargo firing circuit and, before next flight, do applicable 
corrective actions; in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A320-26A1068, Revision 01, 
dated July 19, 2007. Actions done before the effective date of this 
AD in accordance with Airbus Service Bulletin A320-26A1068, dated 
March 19, 2007, are considered acceptable for compliance with the 
requirements of this AD. Accomplishing Airbus MRBR Task 26.23.00/03 
or 26.23.00/07 is an acceptable method of compliance with the 
requirements of this AD.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (g) 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. Send information to ATTN: Tim 
Dulin, Aerospace Engineer, International Branch, ANM-116, Transport 
Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 
98057-3356; telephone (425) 227-2141; fax (425) 227-1149. Before 
using any approved AMOC on any airplane to which the AMOC applies, 
notify your appropriate principal inspector (PI) in the FAA Flight 
Standards District Office (FSDO), or lacking a PI, your local FSDO.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.
    (3) Reporting Requirements: For any reporting requirement in 
this AD, under the provisions of the Paperwork Reduction Act, the 
Office of Management and Budget (OMB) has approved the information 
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (h) Refer to MCAI European Aviation Safety Agency (EASA) 
Airworthiness Directive 2007-0249, dated September 24, 2007, and 
Airbus Service Bulletin A320-26A1068, Revision 01, dated July 19, 
2007, for related information.

    Issued in Renton, Washington, on March 14, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-6051 Filed 3-24-08; 8:45 am]

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