[Federal Register Volume 67, Number 1 (Wednesday, January 2, 2002)]
[Proposed Rules]
[Pages 31-33]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-32193]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NM-350-AD]
RIN 2120-AA64


Airworthiness Directives; Airbus Model A330 and A340 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes the adoption of a new airworthiness 
directive (AD) that is applicable to certain Airbus Model A330 and A340 
series airplanes. This proposal would require a one-time inspection of 
the hydraulically operated valve of the parking brake of the main 
landing gear to identify the part and serial numbers, and follow-on 
actions, if necessary. This action is necessary to prevent leakage of 
the valve, which could result in failure of the ``blue'' hydraulic 
system and consequent failure of alternate parking brake and emergency 
braking systems. This action is intended to address the identified 
unsafe condition.

DATES: Comments must be received by February 1, 2002.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-114, 
Attention: Rules Docket No. 2001-NM-350-AD, 1601 Lind Avenue, SW., 
Renton, Washington 98055-4056. Comments may be inspected at this 
location between 9 a.m. and 3 p.m., Monday through Friday, except 
Federal holidays. Comments may be submitted via fax to (425) 227-1232. 
Comments may also be sent via the Internet using the following address: 
<a href="/cdn-cgi/l/email-protection#7b42561a151656150b0916181416161e150f3b1d1a1a551c140d"><span class="__cf_email__" data-cfemail="5a63773b343777342a2837393537373f342e1a3c3b3b743d352c">[email protected]</span></a>. Comments sent via fax or the Internet must 
contain ``Docket No. 2001-NM-350-AD'' in the subject line and need not 
be submitted in triplicate. Comments sent via the Internet as attached 
electronic files must be formatted in Microsoft Word 97 for Windows or 
ASCII text.
    The service information referenced in the proposed rule may be 
obtained from Airbus Industrie, 1 Rond Point Maurice Bellonte, 31707 
Blagnac Cedex, France. This information may be examined at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington.

FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056, telephone (425) 
227-2125; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications shall identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this action may be changed in 
light of the comments received.
    Submit comments using the following format:
    <bullet> Organize comments issue-by-issue. For example, discuss a 
request to change the compliance time and a request to change the 
service bulletin reference as two separate issues.
    <bullet> For each issue, state what specific change to the proposed 
AD is being requested.
    <bullet> Include justification (e.g., reasons or data) for each 
request.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report summarizing each FAA-public contact concerned with 
the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 
submitted in response to this action must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 2001-NM-350-AD.'' The postcard will be date stamped 
and returned to the commenter.

Availability of NPRMs

    Any person may obtain a copy of this NPRM by submitting a request 
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules 
Docket No. 2001-NM-350-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    The Direction Generale de l'Aviation Civile (DGAC), which is the 
airworthiness authority for France, notified the FAA that an unsafe 
condition may exist on certain Airbus

[[Page 32]]

Model A330 and A340 series airplanes. The DGAC advises that leakage of 
the hydraulically operated valve of the parking brake of the main 
landing gear has been identified on certain Model A320 series 
airplanes. Hydraulic fluid leakage was found at the hydraulic 
connections and the vent hole of the valve. Leakage of the 
hydraulically operated valve, if not corrected, could result in failure 
of the ``blue'' hydraulic system and consequent failure of alternate 
parking brake and emergency braking systems.
    Certain valves having serial numbers marked with a ``V'' or 
``VF+E'' were modified and are not subject to the unsafe condition 
addressed by this AD.

Similar Model

    The same hydraulically operated valve is installed on Model A330 
and A340 series airplanes. Therefore, those airplanes are also subject 
to the unsafe condition identified by this proposed AD.

Explanation of Relevant Service Information

    Airbus has issued Service Bulletins A330-32A3139 and A340-32A4176, 
both including Appendix 01, both dated September 14, 2001. The service 
bulletins describe procedures for a one-time detailed visual inspection 
of the hydraulically operated valve of the parking brake of the main 
landing gear to identify the part and serial numbers, and follow-on 
actions, if necessary. The follow-on actions consist of a visual 
inspection for hydraulic fluid leakage at the valve; repair or 
replacement of the valve with a new or serviceable valve if leakage is 
found, or repeat inspections if valve is not replaced, or if the valve 
is replaced with a valve having the same part or serial number; and an 
operational test following repair or replacement of the valve. 
Accomplishment of the actions specified in the service bulletins is 
intended to adequately address the identified unsafe condition. The 
DGAC issued French airworthiness directives 2001-516(B) and 2001-
517(B), both dated October 31, 2001, in order to assure the continued 
airworthiness of these airplanes in France.

FAA's Conclusions

    These airplane models are manufactured in France and are type 
certificated for operation in the United States under the provisions of 
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and 
the applicable bilateral airworthiness agreement. Pursuant to this 
bilateral airworthiness agreement, the DGAC has kept the FAA informed 
of the situation described above. The FAA has examined the findings of 
the DGAC, reviewed all available information, and determined that AD 
action is necessary for products of this type design that are 
certificated for operation in the United States.

Explanation of Requirements of Proposed Rule

    Since an unsafe condition has been identified that is likely to 
exist or develop on other airplanes of the same type design registered 
in the United States, the proposed AD would require accomplishment of 
the actions specified in the service bulletins described previously, 
except as discussed below.

Difference Between this AD and the Service Bulletins

    Although the service bulletins specify that the manufacturer may be 
contacted for disposition of certain repairs, this AD would require 
such repairs to be accomplished per a method approved by either the 
FAA, or the DGAC (or its delegated agent). In light of the type of 
repair that would be required to address the identified unsafe 
condition, and in consonance with existing bilateral airworthiness 
agreements, the FAA has determined that, for this AD, a repair approved 
by either the FAA or the DGAC would be acceptable for compliance with 
this AD.

Cost Impact

    The FAA estimates that 9 airplanes of U.S. registry would be 
affected by this proposed AD, that it would take approximately 2 work 
hours per airplane to accomplish the proposed inspection, and that the 
average labor rate is $60 per work hour. Based on these figures, the 
cost impact of the proposed AD on U.S. operators is estimated to be 
$1,080, or $120 per airplane.
    The cost impact figure discussed above is based on assumptions that 
no operator has yet accomplished any of the proposed requirements of 
this AD action, and that no operator would accomplish those actions in 
the future if this AD were not adopted. The cost impact figures 
discussed in AD rulemaking actions represent only the time necessary to 
perform the specific actions actually required by the AD. These figures 
typically do not include incidental costs, such as the time required to 
gain access and close up, planning time, or time necessitated by other 
administrative actions.

Regulatory Impact

    The regulations proposed herein 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. Therefore, it 
is determined that this proposal would not have federalism implications 
under Executive Order 13132.
    For the reasons discussed above, I certify that 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) if promulgated, 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. A copy of the draft 
regulatory evaluation prepared for this action is contained in the 
Rules Docket. A copy of it may be obtained by contacting the Rules 
Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration proposes to amend 
part 39 of the Federal Aviation Regulations (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. Section 39.13 is amended by adding the following new 
airworthiness directive:

Airbus Industrie: Docket 2001-NM-350-AD.

    Applicability: Model A330 and A340 series airplanes, as listed 
in Airbus Service Bulletin A330-32A3139 or A340-32A4176, both dated 
September 14, 2001; certificated in any category.


    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
modified, altered, or repaired in the area subject to the 
requirements of this AD. For airplanes that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (b) of 
this AD.

[[Page 33]]

The request should include an assessment of the effect of the 
modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent leakage of the hydraulically operated valve of the 
parking brake of the main landing gear, which could result in 
failure of the ``blue'' hydraulic system and consequent failure of 
alternate parking brake and emergency braking systems, accomplish 
the following:

Inspections/Follow-On Actions

    (a) Within 7 days after the effective date of this AD: Do a one-
time detailed visual inspection to determine the part number (P/N) 
and serial number (S/N) of the hydraulically operated valve of the 
parking brake of the main landing gear per Airbus Service Bulletin 
A330-32A3139 (for Model A330 series airplanes) or A340-32A4176 (for 
Model A340 series airplanes), both including Appendix 01, both dated 
September 14, 2001, as applicable.
    (1) If no P/N or S/N is identified as affected equipment per the 
applicable service bulletin, no further action is required by this 
AD.
    (2) If any P/N or S/N is identified as affected equipment per 
the applicable service bulletin: Before further flight, perform the 
follow-on actions (which may include a visual inspection for 
hydraulic fluid leakage at the valve; repair or replacement of the 
valve with a new or serviceable valve if leakage is found; 
repetitive inspections if valve is not replaced, or if the valve is 
replaced with a valve having the same P/N or S/N; and an operational 
test), according to the applicable service bulletin.


    Note 2: For the purposes of this AD, a detailed visual 
inspection is defined as: ``An intensive visual examination of a 
specific structural area, system, installation, or assembly to 
detect damage, failure, or irregularity. Available lighting is 
normally supplemented with a direct source of good lighting at 
intensity deemed appropriate by the inspector. Inspection aids such 
as mirror, magnifying lenses, etc., may be used. Surface cleaning 
and elaborate access procedures may be required.''

Alternative Methods of Compliance

    (b) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, International Branch, ANM-116, FAA, 
Transport Airplane Directorate. Operators shall submit their 
requests through an appropriate FAA Principal Maintenance Inspector, 
who may add comments and then send it to the Manager, International 
Branch, ANM-116.


    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the International Branch, ANM-116.

Special Flight Permits

    (c) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.


    Note 4: The subject of this AD is addressed in French 
airworthiness directives 2001-516(B) and 2001-517(B), both dated 
October 31, 2001.



    Issued in Renton, Washington, on December 26, 2001.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 01-32193 Filed 12-31-01; 8:45 am]
BILLING CODE 4910-13-U


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