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CFR Citation: 14 CFR Part 39

Docket ID: [Docket No. FAA-2008-0342; Directorate Identifier 2007-NM-305-AD]

RIN ID: RIN 2120-AA64

NOTICE: PROPOSED RULES

ACTION: Airworthiness Directives:

DOCUMENT ACTION: Notice of proposed rulemaking (NPRM).

SUBJECT CATEGORY: Airworthiness Directives; Airbus Model A318, A319, A320, and A321 Series Airplanes

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

DOCUMENT 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.

SUMMARY: Airbus Model A318, A319, A320, and A321 Series Airplanes,

SUPPLEMENTAL INFORMATION

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. FAA20080342; Directorate Identifier 2007NM305AD'' 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 20080249, 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 onetime 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 1505VCA. You may obtain further information by examining the MCAI in the AD docket.

Relevant Service Information

Airbus has issued Service Bulletin A32026A1068, 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 workhours per product to comply with the basic requirements of this proposed AD. The average labor rate is $80 per workhour. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $325,920, or $480 per product.
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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 39AIRWORTHINESS 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. FAA20080342; Directorate Identifier 2007NM 305AD.
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 onetime 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 1505VCA.
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 A32026A1068, Revision 01, dated July 19, 2007. Actions done before the effective date of this AD in accordance with Airbus Service Bulletin A32026A1068, 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, ANM116, 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, ANM116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 980573356; telephone (425) 2272141; fax (425) 2271149. 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 FAAapproved. Corrective actions are considered FAAapproved 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 20070249, dated September 24, 2007, and Airbus Service Bulletin A32026A1068, 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. E86051 Filed 32408; 8:45 am]
BILLING CODE 491013P

FOR FURTHER INFORMATION CONTACT Tim Dulin, Aerospace Engineer, International Branch, ANM116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 980573356; telephone (425) 2272141; fax (425) 2271149.