[Federal Register: December 17, 2003 (Volume 68, Number 242)]
[Proposed Rules]
[Page 70206-70208]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17de03-25]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2002-NM-211-AD]
RIN 2120-AA64
Airworthiness Directives; Airbus Model A300 B4 Series Airplanes
and Model A300 B4-600, A300 B4-600R, and A300 F4-600R (Collectively
Called A300-600) Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: This document proposes the supersedure of an existing
airworthiness directive (AD), applicable to certain Airbus Model A300
B4 series airplanes and all Airbus Model A300-600 series airplanes.
That AD currently requires a one-time high frequency eddy current
inspection to detect cracking of the splice fitting at fuselage frame
(FR) 47 between stringers 24 and 25; and corrective actions if
necessary. This action would require new repetitive inspections of an
expanded area, and would add airplanes to the applicability in the
existing AD. The actions specified by the proposed AD are intended to
detect and correct cracking of the splice fitting at fuselage FR 47,
which could result in reduced structural integrity of the airplane.
This action is intended to address the identified unsafe condition.
DATES: Comments must be received by January 16, 2004.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 2002-NM-211-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:
9-anm-nprmcomment@faa.gov. Comments sent via fax or the Internet must
contain ``Docket No. 2002-NM-211-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 or 2000 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: Tom Rodriguez, Aerospace Engineer,
International Branch, ANM-116, Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 227-
1137; 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:
[sbull] 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.
[sbull] For each issue, state what specific change to the proposed
AD is being requested.
[sbull] 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 2002-NM-211-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. 2002-NM-211-AD, 1601 Lind Avenue, SW., Renton, Washington
98055-4056.
Discussion
On February 9, 2001, the FAA issued AD 2001-03-14, amendment 39-
12118 (66 FR 10957, February 21, 2001), applicable to certain Airbus
Model A300 series airplanes and all Airbus Model A300-600 series
airplanes. That AD requires a one-time high frequency eddy current
(HFEC) inspection to detect cracking of the splice fitting at fuselage
frame (FR) 47 between stringers 24 and 25; and corrective actions if
necessary. That action was prompted by issuance of mandatory continuing
airworthiness information by a foreign
[[Page 70207]]
civil airworthiness authority. The requirements of that AD are intended
to detect and correct cracking of the splice fitting at fuselage FR 47,
which could result in reduced structural integrity of the airplane.
Actions Since Issuance of Previous AD
Since the issuance of AD 2001-03-14, 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 Model A300 B4 and all A300-600 series airplanes. The DGAC
advises that cracks have been found on airplanes on which the
modification specified in the existing AD has been done, and HFEC
inspections of the modification performed. A laboratory investigation
was done on a cracked splice fitting, and the analysis of crack growth
rate shows that an inspection program is necessary for all airplanes
affected by the existing AD. This program involves expanding the
inspection area to fuselage frame (FR) 47 between stringers 24 and 26
(the existing AD specified stringers 24 and 25), and adding new
repetitive inspections. Cracking of the splice fitting at fuselage FR
47 could result in reduced structural integrity of the airplane.
Explanation of Relevant Service Information
Airbus has issued Service Bulletins A300-53-0350 (for Model A300
series airplanes) and A300-53-6123 (for Model A300-600 series
airplanes), both Revision 01, both dated December 18, 2001. The
procedures specified in Revision 01 of the service bulletins are
similar to those specified in the original issue of the service
bulletins referenced in the existing AD for accomplishment of the
inspections and corrective actions. However, Revision 01 defines a new
inspection program for pre-mod and post-mod airplanes which expands the
inspection area to fuselage frame (FR) 47 between stringers 24 and 26,
and adds an HFEC rotating probe inspection after bolt removals.
Revision 01 also adds airplanes to the applicability specified in the
original issue. Revision 01 of the service bulletins also describes
certain repair procedures. The DGAC classified the service bulletins as
mandatory and issued French airworthiness directive 2002-184(B), dated
April 3, 2002, to ensure 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 us informed of the
situation described above. We have 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 AD
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 supersede AD 2001-03-14 to
require new repetitive inspections of an expanded area and to add
airplanes to the applicability in the existing AD. The actions would be
required to be accomplished in accordance with the service bulletins
described previously, except as discussed below.
Clarification of Compliance Times
The compliance times specified in the service bulletins for doing
the high frequency eddy current inspections do not specify whether the
inspections should be done at the earlier or later of the recommended
flight cycles/flight hours. This proposed AD adds ``whichever is
first'' to those compliance times. In addition, the compliance times
specified do not give an effective date for when the inspections are to
be accomplished; this proposed AD requires accomplishment of the
inspections ``after the effective date of this AD.''
Interim Action
We consider this proposed AD interim action. The manufacturer is
currently developing a modification that would address the unsafe
condition identified in this proposed AD. Once this modification is
developed, approved, and available, we may consider additional
rulemaking.
Differences Between Proposed AD and Service Information
Although the service bulletins specify that the manufacturer may be
contacted for disposition of certain repair conditions, this proposed
AD would require the repair of those conditions to be accomplished in
accordance with 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, we have determined that,
for the proposed AD, a repair approved by either us or the DGAC would
be acceptable for compliance with this proposed AD.
Service Bulletin A300-53-0350 specifies doing the initial
inspection at the next C-check, but not exceeding a certain number of
flight cycles or flight hours, as the recommended compliance time.
Because ``C-check'' schedules vary among operators, such a nonspecific
interval would provide no assurance that operators would do the
inspection within the prescribed schedule. This proposed AD would
exclude the C-check and specify only flight cycles or flight hours. We
find that such a compliance time is appropriate for affected airplanes
to continue to operate without compromising safety.
The service bulletins referenced in this proposed AD specify to
submit certain inspection findings to the manufacturer; however, this
AD does not include such a requirement.
Cost Impact
There are approximately 83 airplanes of U.S. registry that would be
affected by this proposed AD.
The inspection of an expanded area that is proposed in this AD
action would take approximately 29 work hours per airplane to
accomplish, at an average labor rate of $65 per work hour. Based on
these figures, the cost impact of the proposed inspection on U.S.
operators is estimated to be $156,455, or $1,885 per airplane, per
inspection cycle.
The cost impact figure discussed above is based on assumptions that
no operator has yet accomplished any of the current or 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,
[[Page 70208]]
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 removing amendment 39-12118 (66 FR
10957, February 21, 2001), and by adding a new airworthiness directive
(AD), to read as follows:
Airbus: Docket 2002-NM-211-AD. Supersedes AD 2001-03-14, Amendment
39-12118.
Applicability: All Model A300 B4-600, B4-600R, and F4-600R
(Collectively Called A300-600) series airplanes; and all Model A300
B4 series airplanes; certificated in any category.
Compliance: Required as indicated, unless accomplished
previously.
To detect and correct cracking of the splice fitting at fuselage
frame (FR) 47, which could result in reduced structural integrity of
the airplane, accomplish the following:
Repetitive Inspections
(a) For airplanes defined in Airbus Service Bulletin A300-53-
0350, Revision 01, dated December 18, 2001: Do a high frequency eddy
current (HFEC) inspection to detect cracking of the splice fitting
at fuselage FR 47 between stringers 24 and 26 (left- and right-hand
sides), at the applicable times specified in paragraph (a)(1) or
(a)(2) of this AD. Repeat the inspection thereafter at the earlier
of the flight-cycle/flight-hour intervals specified in the
applicable column in Table 2 of Figure 1 and Sheet 1 of the
Accomplishment Instructions of the service bulletin. Do the
inspections per the service bulletin, excluding Appendix 01.
(1) For airplanes that have accumulated 20,000 or more total
flight cycles as of the effective date of this AD: Do the initial
inspection at the later of the times specified in paragraphs
(a)(1)(i) and (a)(1)(ii) of this AD:
(i) At the earlier of the flight-cycle/flight-hour intervals
after the effective date of this AD, as specified in the applicable
column in Table 1 of Figure 1 and Sheet 1 of the Accomplishment
Instructions of the service bulletin.
(ii) Within 750 flight cycles or 1,500 flight hours after the
effective date of this AD, whichever is first.
(2) For airplanes that have accumulated fewer than 20,000 total
flight cycles as of the effective date of this AD: Do the initial
inspection at the later of the times specified in paragraphs
(a)(2)(i) and (a)(2)(ii) of this AD.
(i) At the earlier of the flight-cycle/flight-hour intervals
after the effective date of this AD, as specified in the applicable
column in Table 1 of Figure 1 and Sheet 1 of the Accomplishment
Instructions of the service bulletin.
(ii) Within 1,800 flight cycles or 3,000 flight hours after the
effective date of this AD, whichever is first.
(b) For airplanes defined in Airbus Service Bulletin A300-53-
6123, Revision 01, dated December 18, 2001: Do the HFEC inspection
required by paragraph (a) of this AD at the applicable times
specified in paragraph (b)(1) or (b)(2) of this AD. Repeat the
inspection thereafter at the earlier of the flight-cycle/flight-hour
intervals specified in the applicable column in Table 2 of Figure 1
and Sheet 1 of the Accomplishment Instructions of the service
bulletin. Do the inspections per the service bulletin, excluding
Appendix 01.
(1) For airplanes that have accumulated 10,000 or more total
flight cycles as of the effective date of this AD: Do the initial
inspection within 750 flight cycles or 1,900 flight hours after the
effective date of this AD, whichever is first.
(2) For airplanes that have accumulated fewer than 10,000 total
flight cycles as of the effective date of this AD: Do the initial
inspection at the later of the times specified in paragraphs
(b)(2)(i) and (b)(2)(ii) of this AD.
(i) At the earlier of the flight-cycle/flight-hour intervals
after the effective date of this AD, as specified in the applicable
column in Table 1 of Figure 1 and Sheet 1 of the Accomplishment
Instructions of the service bulletin.
(ii) Within 1,500 flight cycles or 3,800 flight hours after the
effective date of this AD, whichever is first.
Repair
(c) Repair any cracking found during any inspection required by
this AD before further flight, per Airbus Service Bulletin A300-53-
0350 or A300-53-6123, both Revision 01, both excluding Appendix 01,
both dated December 18, 2001; as applicable. Where the service
bulletins specify to contact Airbus in case of certain crack
findings, this AD requires that a repair be accomplished before
further flight in accordance with a method approved by either the
Manager, International Branch, ANM-116, FAA, Transport Airplane
Directorate; or the Direction G[egrave]n[egrave]rale de l'Aviation
Civile (DGAC) (or its delegated agent).
Alternative Methods of Compliance
(d) In accordance with 14 CFR 39.19, the Manager, International
Branch, ANM-116, is authorized to approve alternative methods of
compliance for this AD.
Note 1: The subject of this AD is addressed in French
airworthiness directive 2002-184(B), dated April 3, 2002.
Issued in Renton, Washington, on December 5, 2003.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 03-31067 Filed 12-16-03; 8:45 am]
BILLING CODE 4910-13-P