[Federal Register Volume 69, Number 241 (Thursday, December 16, 2004)]
[Proposed Rules]
[Pages 75282-75287]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 04-27520]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99-NM-129-AD]
RIN 2120-AA64


Airworthiness Directives; Lockheed Model L-1011-385 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Supplemental notice of proposed rulemaking; reopening of 
comment period.

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SUMMARY: This document revises an earlier proposed airworthiness 
directive (AD), applicable to all Lockheed Model L-1011-385 series 
airplanes, that would have required repetitive inspections to detect 
corrosion or fatigue cracking of certain structural elements of the 
airplane; corrective actions if necessary; and incorporation of certain 
structural modifications. This new action revises the proposed rule by 
referencing a new service bulletin that, among other changes, corrects 
the effectivity and revises the modification threshold of various 
secondary service bulletins. The actions specified by this new proposed 
AD are intended to prevent corrosion or fatigue cracking of certain 
structural elements, 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 10, 2005.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-114, 
Attention: Rules Docket No. 99-NM-129-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#f0c9dd919e9ddd9e80829d939f9d9d959e84b0969191de979f86"><span class="__cf_email__" data-cfemail="c8f1e5a9a6a5e5a6b8baa5aba7a5a5ada6bc88aea9a9e6afa7be">[email protected]</span></a>. Comments sent via fax or the Internet must 
contain ``Docket No. 99-NM-129-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 Lockheed Martin Aircraft & Logistics Centers, 120 Orion 
Street, Greenville, South Carolina 29605. This information may be 
examined at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, 
SW., Renton, Washington; or at the FAA, Atlanta Aircraft Certification 
Office, One Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, 
Georgia.

FOR FURTHER INFORMATION CONTACT: William Herderich, Aerospace Engineer, 
Airframe Branch, ACE-117A, FAA, Atlanta Aircraft Certification Office, 
One Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, Georgia 
30349; telephone (770) 703-6082; fax (770) 703-6097.

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,

[[Page 75283]]

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 99-NM-129-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. 99-NM-129-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    A proposal to amend part 39 of the Federal Aviation Regulations (14 
CFR part 39) to add an airworthiness directive (AD), applicable to all 
Lockheed Model L-1011-385 series airplanes, was published as a notice 
of proposed rulemaking (NPRM) (hereafter referred to as ``the original 
NPRM'') in the Federal Register on December 9, 1999 (64 FR 68960). The 
original NPRM would have required repetitive inspections to detect 
corrosion or fatigue cracking of certain structural elements of the 
airplane; corrective actions if necessary; and incorporation of certain 
structural modifications. The original NPRM was prompted by new 
recommendations related to incidents of fatigue cracking and corrosion 
in transport category airplanes that are approaching or have exceeded 
their economic design goal. Such corrosion or fatigue cracking in 
certain structural elements, if not corrected, could result in reduced 
structural integrity of the airplane.

Comments

    Due consideration has been given to the comments received in 
response to the original NPRM.

Request To Reference Latest Revision of Service Bulletin

    One commenter, the airplane manufacturer, provides clarification 
about the compliance times specified in paragraphs (a)(1), (a)(2), 
(c)(1), and (c)(2) of the original NPRM as they pertain to certain 
service bulletins identified in Lockheed Tristar L-1011 Service 
Bulletin (SB) 093-51-041, dated April 27, 1998 (which is referenced in 
the original NPRM as the appropriate source of service information for 
accomplishing the proposed actions; hereafter called the ``Collector 
Service Bulletin''). The commenter states that it will initiate 
Revision 1 of the Collector Service Bulletin to reflect that continuing 
inspections are called for by SB 093-57-208; to list the latest 
revision CN4, dated May 8, 1998, of SB 093-53-260; to reference AD 99-
09-14, amendment 39-11147 (64 FR 20144, April 28, 1999); and to revise 
the threshold of certain modifications.
    From this comment, the FAA infers that the commenter is requesting 
that the original NPRM reference Revision 1 of the Collector Service 
Bulletin. We agree. The original issue of the Collector Service 
Bulletin was referenced in the original NPRM as the appropriate source 
of service information. The original issue describes procedures for 
certain repetitive inspections to detect corrosion or fatigue cracking 
of certain structural elements of the airplane; corrective actions, if 
necessary; and incorporation of certain structural modifications. Since 
the issuance of the original NPRM, we have reviewed and approved 
Revision 1 of Lockheed SB 093-51-41, dated March 3, 2000. Revision 1 of 
the service bulletin corrects the effectivity and revises the 
``Modification Termination Threshold'' of various secondary SBs; 
revises SB 093-53-260, CN3 to CN4; and contains certain editorial 
changes. We have revised the supplemental NPRM to include reference to 
Revision 1 of SB 093-51-041 as the appropriate source of service 
information.

Requests To Clarify Certain Compliance Times

    One commenter, the airplane manufacturer, provides further 
clarification about the compliance times specified in paragraphs (a)(1) 
and (a)(2) of the original NPRM for the inspections specified in SB 
093-57-058, R5-CN1, dated August 22, 1995, which is listed in the 
Collector Service Bulletin. The commenter states the SB 093-57-208, 
Revision 1, dated October 28, 1997, which is also listed in the 
Collector Service Bulletin, forces inspection of the center box wing 
spar web at different frequencies. Since both of these SBs will be 
mandated, the commenter assumes the earlier schedule will take 
precedence.
    From this comment, we infer that the commenter is requesting that 
the compliance times specified in paragraphs (a)(1) and (a)(2) of the 
supplemental NPRM be clarified. We agree. We find that paragraph (c)(1) 
of the supplemental NPRM also needs to be clarified. Those paragraphs 
refer to the threshold and repetitive intervals specified in the 
individual service bulletin as listed in Tables 1 and II of the 
Collector Service Bulletin, as applicable. In the ``Inspection 
Threshold'' and ``Reinspection Intervals'' columns of Tables 1 and II, 
the Collector Service Bulletin references a total of eight notes (i.e., 
three notes in Table 1 and five notes in Table II) located at the 
bottom of those tables. Our intent was that the information specified 
in those notes be required as part of the applicable compliance time.
    As indicated in NOTE (1) of Tables I and II the Collector Service 
Bulletin, ``Inspection thresholds and repeat inspection intervals are 
shown for convenience, in the event of conflicts the individual service 
bulletin shall take precedence. Some service bulletins contain 
inspection options that are not shown here.'' Therefore, for the 
subject inspections, the inspection times listed in SB 093-57-058, R5-
CN1, take precedence.
    In light of this request and other similar requests below, we find 
that operators may misinterpret the compliance times specified in the 
original NPRM. Therefore, for clarification purposes, we have revised 
the supplemental NPRM by listing the compliance times for each 
individual service bulletin in a table (i.e., Table 1) and revised 
paragraphs (a)(1), (a)(2), and (c)(1) to refer to the individual 
service bulletin listed in Table 1.
    One commenter requests that the compliance times specified in 
paragraphs (a)(1) and (a)(2) of the original NPRM for the initial 
fatigue-related inspection (i.e., reference SB 093-53-276, Basic, dated 
June 17, 1996) be clarified as to whether that inspection is to be done 
at two or four years or is dependent upon corrosion inhibiting compound 
(CIC) application. The commenter notes that Table 1 of the ``Collector 
Service Bulletin states that the repetitive interval for Service 
Bulletin 093-53-276 is ``CPCP (5).'' The commenter states that SB 093-
53-276 refers to two Corrosion Prevention and Control Program (CPCP) 
tasks, which are accomplished repetitively at either two or four years 
(if 2 part CIC is used).
    We do not agree. SB 093-53-276 recommends the use of the initial 
and repetitive intervals specified in corrosion tasks C-53-120-04 and 
C-53-160-01, as described in the Lockheed Corrosion Prevention and 
Control Program (CPCP). In this case, the later of the times is the 15-
year threshold and

[[Page 75284]]

10-year repetitive interval specified in C-53-160-01. No change to the 
supplemental NPRM is necessary in this regard.
    One commenter requests that SB 093-53-266, which is referenced in 
the Collector Service Bulletin as an additional source of service 
information, be revised as described in items 1 through 4 below.
    1. The initial threshold should be ``prior to the threshold listed 
in SB 093-53-266, or within one `C' interval after the effective AD 
date of the AD, whichever occurs later.'' From this comment, we infer 
that the commenter is requesting a grace period for the initial 
threshold specified in the service bulletin, because the compliance 
time specified in the subject SB is ``within 1 year after receipt of 
this service bulletin.''
    We do not agree. As indicated in ``NOTE 2'' of the Collector 
Service Bulletin, `` * * * perform these inspections as specified 
except substitute `Effective Date of Airworthiness Directive' for 
`After Receipt of Service Bulletin.' '' Therefore, the initial 
threshold specified in this supplemental NPRM is within 1 year after 
the effective date of this AD for that SB. However, for clarification 
purposes, we have revised the supplemental NPRM by listing the 
compliance times for each individual service bulletin in Table 1 and 
revised paragraphs (a)(1), (a)(2), and (c)(1) to refer to the 
individual service bulletin listed in that table (discussed 
previously).
    2. For airplanes not previously repaired per SB 093-53-264: Within 
1 year, do the inspection per paragraph B of the Accomplishment 
Instructions of SB 093-53-266, and repetitively inspect frames found to 
be cracked at intervals not to exceed 90 days until modified by the 
referenced ``LCC'' drawing.
    We do not agree. The 1-year inspection threshold is already 
identified in paragraph (1)(C)(1) of SB 093-53-266. In addition, it is 
our policy to require repair of known cracks before further flight (we 
may make exceptions to this policy in certain cases of unusual need, as 
discussed below). This policy is based on the fact that such damaged 
airplanes do not conform to the FAA-certificated type design and, 
therefore, are not airworthy until a properly approved repair is 
incorporated. While recognizing that repair deferrals may be necessary 
at times, our policy is intended to minimize adverse human factors 
relating to the lack of reliability of long-term repetitive 
inspections, which may reduce the safety of the type certificated 
design if such repair deferrals are practiced routinely. Additionally, 
our policy applies to airplanes certificated to damage tolerance 
evaluation regulations, as well as those not so certificated.
    As noted above, we may make an exception to this policy in certain 
cases, if there is an unusual need for a temporary deferral. Unusual 
needs include such circumstances as legitimate difficulty in acquiring 
parts to accomplish repairs. Under such conditions, we may allow a 
temporary deferral of the repair, subject to a stringent inspection 
program acceptable to us. We acknowledge that the manufacturer has 
specified inspection intervals that are intended to allow continued 
operation with known cracks, and to prevent the need for extensive 
repairs. However, since we are not aware of any unusual need for repair 
deferral in regard to this supplemental NPRM, we have not evaluated 
these inspection intervals.
    We consider the compliance times in this supplemental NPRM to be 
adequate to allow operators time to acquire parts to have on hand in 
the event that a crack is detected during inspection. Therefore, we 
have determined that, due to the safety implications and consequences 
associated with such cracking, any subject frame that is found to be 
cracked must be repaired or modified prior to further flight. No change 
to the supplemental NPRM is necessary in this regard.
    3. For airplanes previously repaired per LCC drawings LCC-7622-337 
or -325: Within 15,000 flight after repair installation, and thereafter 
at intervals not to exceed 15,000 cycles, inspect per paragraph C of 
the Accomplishment Instructions of SB 093-53-266.
    We do not agree. The compliance times identified by the commenter 
are already identified in paragraph (1)(C)(2) of SB 093-53-266. No 
change to the supplemental NPRM is necessary in this regard.
    4. For airplanes repaired or modified per SB 093-53-264 or -266: 
Every heavy maintenance visit (HMV), do a visual inspection per 
paragraph C of SB 093-53-266.
    We do not agree. The compliance time identified by the commenter is 
already identified in paragraph (1)(C)(3) of SB 093-53-266. No change 
to the supplemental NPRM is necessary in this regard.
    One commenter, the airplane manufacturer, notes that Table II of 
the Collector Service Bulletin does not specify a threshold or 
repetitive interval for SB 093-53-054, Revision 1, dated August 12, 
1975. However, the notes of the Collector Service Bulletin say to 
modify at next HMV. The commenter notes that this SB is a modification 
only.
    From this comment, we infer that the commenter is requesting that 
the compliance times specified in paragraph (c)(1) of the supplemental 
NPRM be clarified. We agree. For clarification purposes, we have 
revised the supplemental NPRM by listing the compliance times for each 
individual service bulletin in Table 1 and revised paragraphs (a)(1), 
(a)(2), and (c)(1) to refer to the individual service bulletin listed 
in that table (discussed previously).

Request for Credit for Previously Approved Alternative Methods of 
Compliance (AMOC) for Other ADs

    One commenter requests that previously approved AMOCs for other ADs 
(i.e., AD 91-21-51, and AD 99-09-14) that refer to several of the SBs 
listed in the Collector Service Bulletin be approved for the original 
NPRM.
    We do not agree. We find that any previously approved AMOC must be 
assessed for its impact on the actions specified by this supplemental 
NPRM. Paragraph (d) of this supplemental NPRM provides affected 
operators the opportunity to apply for an AMOC. No change to the 
supplemental NPRM is necessary in this regard.

Conclusion

    Since certain of these changes expand the scope of the originally 
proposed rule, we have determined that it is necessary to reopen the 
comment period to provide additional opportunity for public comment.

Changes to 14 CFR Part 39/Effect on the AD

    On July 10, 2002, the FAA issued a new version of 14 CFR part 39 
(67 FR 47997, July 22, 2002), which governs the FAA's airworthiness 
directives system. The regulation now includes material that relates to 
altered products, special flight permits, and alternative methods of 
compliance. However, for clarity and consistency in this final rule, we 
have retained the language of the NPRM regarding that material.

Changes to Labor Rate

    We have reviewed the figures we have used over the past several 
years to calculate AD costs to operators. To account for various 
inflationary costs in the airline industry, we find it necessary to 
increase the labor rate used in these calculations from $60 per work 
hour to $65 per work hour. The cost impact information, below, reflects 
this increase in the specified hourly labor rate.

[[Page 75285]]

Cost Impact

    There are approximately 235 airplanes of the affected design in the 
worldwide fleet. The FAA estimates that 117 airplanes of U.S. registry 
would be affected by this proposed AD.
    It would take approximately 32 work hours per airplane (for actions 
specified in Table I of the Collector Service Bulletin) and 97 work 
hours per airplane (for actions specified in Table II of the Collector 
Service Bulletin) to accomplish the proposed inspections, at an average 
labor rate of $65 per work hour. Based on these figures, the cost 
impact of the proposed AD on U.S. operators is estimated to be 
$243,360, or $2,080 per airplane, per inspection cycle (for Table I), 
and $737,685, or $6,305 per airplane, per inspection cycle (for Table 
II).
    It would take approximately 614 work hours per airplane to 
accomplish the proposed modifications, at an average labor rate is $65 
per work hour. Required parts would cost approximately $142,275 per 
airplane. Based on these figures, the cost impact of the proposed AD on 
U.S. operators is estimated to be $21,315,645, or $182,185 per 
airplane.
    The cost impact figures discussed above are 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.

Authority for This Rulemaking

    The FAA's authority to issue rules regarding aviation safety is 
found in Title 49 of the United States Code. 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.
    This rulemaking is promulgated under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, the FAA is charged with promoting 
safety 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 AD.

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:

Lockheed: Docket 99-NM-129-AD.

    Applicability: All Model L-1011-385 series airplanes, 
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 (d) of 
this AD. 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 corrosion or fatigue cracking of certain structural 
elements, which could result in reduced structural integrity of the 
airplane, accomplish the following:

Inspections

    (a) At the time specified in the ``Initial Compliance Time'' 
column of Table 1 of this AD, perform structural inspections to 
detect corrosion or fatigue cracking of certain structural elements 
of the airplane, in accordance with the applicable service bulletins 
listed under ``Service Bulletin Number, Revision, and Date'' in 
Tables I and II of Lockheed Tristar L-1011 Service Bulletin 093-51-
041, Revision 1, dated March 3, 2000. Thereafter, repeat the 
inspections at intervals specified in the ``Repetitive Intervals'' 
column of Table 1 of this AD.

                                           Table 1.--Compliance Times
----------------------------------------------------------------------------------------------------------------
                                        Initial compliance time (whichever occurs later
                                         between the times in ``Inspection Threshold''
      Lockheed service bulletin                      and ``Grace Period'')                 Repetitive intervals
                                      --------------------------------------------------
                                         Inspection threshold         Grace period
----------------------------------------------------------------------------------------------------------------
(1) 093-53-269, Revision 1, dated      Before the accumulation  Within 6,450 flight      At intervals not to
 October 28, 1997.                      8,000 total flight       cycles or 5 years        exceed 6,450 flight
                                        cycles or 15,000 total   after the effective      cycles or 5 years,
                                        flight hours,            date of this AD,         whichever occurs
                                        whichever occurs first.  whichever occurs first.  first.
(2) 093-53-274, dated May 28, 1997...  Within 14 months after   (None).................  At intervals not to
                                        the effective date of                             exceed 14 months.
                                        this AD.

[[Page 75286]]

 
(3) 093-53-275, dated December 10,     Within 6,450 flight      (None).................  (None).
 1996.                                  cycles or 5 years
                                        after the effective
                                        date of this AD,
                                        whichever occurs first.
(4) 093-53-276, dated June 17, 1996..  At the next Corrosion    (None).................  At intervals not to
                                        Prevention and Control                            exceed the next CPCP
                                        Program (CPCP)                                    inspection.
                                        inspection after the
                                        effective date of this
                                        AD.
(5) 093-57-085, Revision 1, dated      Before the accumulation  Within 1,800 flight      At intervals not to
 December 1, 1997.                      of 26,000 total flight   cycles or 3,300 flight   exceed 1,800 flight
                                        cycles or 48,000 total   hours after the          cycles or 3,300 flight
                                        flight hours,            effective date of this   hours, whichever first
                                        whichever occurs first.  AD, whichever occurs     occurs first.
                                                                 first.
(6) 093-57-208, Revision 1, dated      Before the accumulation  Within 6,450 flight      At intervals not to
 October 28, 1997.                      of 18,000 total flight   cycles or 5 years        exceed 6,450 flight
                                        cycles.                  after the effective      cycles or 5 first
                                                                 date of this AD,         years, whichever
                                                                 whichever occurs first.  occurs first.
(7) 093-52-210, dated July 19, 1991..  Within 5,000 flight      (None).................  (None).
                                        hours or 18 months
                                        after the effective
                                        date of this AD,
                                        whichever occurs first.
(8) 093-53-054, dated August 12, 1975  Within 6,450 flight      (None).................  (None).
                                        cycles or 5 years
                                        after the effective
                                        date of this AD,
                                        whichever occurs first.
(9) 093-53-070, Revision 3, dated      Before the accumulation  Within 1,500 flight      At intervals not to
 September 19, 1989.                    of 6,000 total flight    hours after the          exceed 3,000 flight
                                        hours.                   effective date of this   hours.
                                                                 AD.
(10) 093-53-085, Revision 3, dated     Part I: Before the       Part I: Within 1,600     Part I: At intervals
 December 15, 1989.                     accumulation of 20,000   flight cycles or 3,000   not to exceed 1,600
                                        flight cycles or         flight hours after the   flight cycles or 3,000
                                        37,000 total flight      effective date of this   flight hours,
                                        hours, whichever         AD, whichever occurs     whichever occurs
                                        occurs first.            first.                   first.
                                       Part II: Before the      Part II: Within 5,000    Part II: At intervals
                                        accumulation of 30,000   flight cycles or 9,200   not to exceed 5,000
                                        flight cycles or         flight hours after the   flight cycles or 9,200
                                        55,000 total flight      effective date of this   flight hours,
                                        hours, whichever         AD, whichever occurs     whichever occurs
                                        occurs first.            first.                   first.
(11) 093-53-086, Revision 5, dated     Before the accumulation  Within 1,600 flight      At intervals not to
 April 12, 1990.                        of 9,000 flight cycles   cycles or 3,000 flight   exceed 1,600 flight
                                        or 10,000 flight         hours after the          cycles or 3,000 flight
                                        hours, whichever         effective date of this   hours, whichever
                                        occurs first.            AD, whichever occurs     occurs first.
                                                                 first.
(12) 093-53-110, Revision 1, dated     Before the accumulation  Within 2,200 flight      At intervals not to
 May 7, 1993.                           of 22,000 total flight   cycles or 4,000 flight   exceed 2,200 flight
                                        cycles or 40,000 total   hours after the          cycles or 4,000 flight
                                        flight hours,            effective date of this   hours, whichever
                                        whichever occurs first.  AD, whichever occurs     occurs first.
                                                                 first.
(13) Change Notification 093-53-260,   Before the accumulation  Within 800 flight        At intervals not to
 CN4, dated May 8, 1998.                of 8,000 total flight    cycles or 1,500 flight   exceed 800 flight
                                        cycles or 20,000 total   hours after the          cycles or 1,500 flight
                                        flight hours,            effective date of this   hours, whichever
                                        whichever occurs first.  AD, whichever occurs     occurs first.
                                                                 first.
(14) Change Notification 093-53-266,   Within 12 months after   (None).................  At intervals not to
 CN1, dated July 10, 1992.              the effective date of                             exceed 90 days.
                                        this AD.
(15) Change Notification 093-57-058,   Before the accumulation  Within 1,600 flight      At intervals not to
 R5-CN1, dated May 3, 1993.             of 20,000 total flight   cycles or 3,000 flight   exceed 1,600 flight
                                        cycles or 37,000 total   hours after the          cycles or 3,000 flight
                                        flight hours,            effective date of this   hours, whichever
                                        whichever occurs first.  AD, whichever occurs     occurs first.
                                                                 first.
(16) Change Notification 093-57-195,   For airplanes having     Within 2,200 flight      At intervals not to
 R3-CN1, dated August 22, 1995.         serial numbers (S/N)     cycles after the         exceed 2,200 flight
                                        1002 through 1109        effective date of this   cycles.
                                        inclusive: Before the    AD.
                                        accumulation of 20,000
                                        total flight cycles.
                                       For airplanes having S/
                                        Ns 1110 through 1250
                                        inclusive: Before the
                                        accumulation of 30,000
                                        total flight cycles..

[[Page 75287]]

 
(17) Change Notification 093-57-213,   For Model L-1011-385-1,  Within 6,450 flight      At intervals not to
 CN1, dated February 20, 1996.          L-1011-385-1-14, L-      cycles or 5 years        exceed 6,450 flight
                                        1011-385-1-15: Before    after the effective      cycles or 5 years,
                                        the accumulation of      date of this AD,         whichever occurs
                                        15,00 total flight       whichever occurs first.  first.
                                        cycles.
                                       For Model L-1011-385-3:
                                        Before the
                                        accumulation of 10,000
                                        total flight cycles..
----------------------------------------------------------------------------------------------------------------

Corrective Action

    (b) If any cracking or corrosion is detected during any 
inspection required by paragraph (a) of this AD, prior to further 
flight, accomplish the actions specified in paragraph (b)(1), 
(b)(2), (b)(3), or (b)(4) of this AD.
    (1) Repair in accordance with the applicable service bulletin 
referenced in Table I or II of Lockheed Tristar L-1011 Service 
Bulletin 093-51-041, Revision 1, dated March 3, 2000.
    (2) Repair in accordance with the applicable section of the 
Lockheed L-1011 Structural Repair Manual.
    (3) Accomplish the terminating modification in accordance with 
the applicable service bulletin referenced in Table I or II of 
Lockheed Tristar L-1011 Service Bulletin 093-51-041, Revision 1, 
dated March 3, 2000.
    (4) Repair in accordance with a method approved by the Manager, 
Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane 
Directorate.

Terminating Action

    (c) Within 5 years or 5,000 flight cycles after the effective 
date of this AD, whichever occurs first, install the terminating 
modification referenced in the applicable service bulletin listed in 
Table 1 of this AD, per the applicable service bulletin. Such 
installation constitutes terminating action for the applicable 
structural inspection required by paragraph (a) of this AD.

Alternative Methods of Compliance

    (d) 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, Atlanta Aircraft Certification 
Office (ACO), FAA. Operators shall submit their requests through an 
appropriate FAA Principal Maintenance Inspector, who may add 
comments and then send it to the Manager, Atlanta ACO.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Atlanta ACO.

Special Flight Permits

    (e) 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.

    Issued in Renton, Washington, on December 7, 2004.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 04-27520 Filed 12-15-04; 8:45 am]
BILLING CODE 4910-13-P


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