[Federal Register Volume 71, Number 44 (Tuesday, March 7, 2006)]
[Proposed Rules]
[Pages 11345-11349]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-3221]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-24073; Directorate Identifier 2002-NM-272-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 727-200 Series Airplanes 
Equipped With a No. 3 Cargo Door

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede an existing airworthiness 
directive (AD) that applies to certain Boeing Model 727-200 series 
airplanes. The existing AD currently requires initial and repetitive 
inspections for cracks in the forward frame of the No. 3 cargo door 
cutout; and corrective actions, if necessary. The existing AD also 
provides for an optional structural modification, which terminates the 
repetitive inspections. This proposed AD would reduce the compliance 
time for the initial inspections and add an optional method of 
inspection for both the initial and repetitive inspections. This 
proposed AD would also add initial and repetitive inspections of an 
additional area and repair if necessary. Additionally, this proposed AD 
would clarify that the previously optional structural modification is 
now required by other rulemaking. This proposed AD results from 
additional reports of cracking in the forward frame of the No. 3 cargo 
door cutout. We are proposing this AD to detect and correct cracking of 
the forward frame and fuselage skin of the No. 3 cargo door cutout, 
which could result in failure of the frame and skin, and consequent 
rapid decompression of the airplane.

DATES: We must receive comments on this proposed AD by April 21, 2006.

ADDRESSES: Use one of the following addresses to submit comments on 
this proposed AD.
     DOT Docket Web site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, room PL-401, 
Washington, DC 20590.
     Fax: (202) 493-2251.
     Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.

FOR FURTHER INFORMATION CONTACT: Daniel F. Kutz, Aerospace Engineer, 
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
917-6456; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to submit any relevant written data, views, or 
arguments regarding this proposed AD. Include the docket number 
``Docket No. FAA-2006-24073; Directorate Identifier 2002-NM-272-AD'' at 
the beginning of your comments. We specifically invite comments on the 
overall regulatory, economic, environmental, and energy aspects of the 
proposed AD. We will consider all comments received by the closing date 
and may amend the proposed AD in light of those comments.
    We will post all comments we receive, without change, to http://dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this proposed AD. Using the search function of 
that web site, anyone can find and read the comments in any of our 
dockets, including the name of the individual who sent the comment (or 
signed the comment on behalf of an association, business, labor union, 
etc.). You may review the DOT's complete Privacy Act Statement in the 
Federal Register published on April 11, 2000 (65 FR 19477-78), or may 
visit http://dms.dot.gov.

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT 
street address stated in the ADDRESSES section. Comments will be 
available in the AD docket shortly after the Docket Management System 
receives them.

[[Page 11346]]

Discussion

    On August 10, 1987, we issued AD 86-17-05 R1, amendment 39-5714 (52 
FR 32534, August 28, 1987), for certain Boeing Model 727-200 series 
airplanes. AD 86-17-05 R1 requires initial and repetitive visual 
inspections of the forward frame of the No. 3 cargo door cutout for 
cracks, and repair of any crack detected. That AD also provides for 
optional structural modification of uncracked frames, which terminates 
the repetitive inspections.

Actions Since Existing AD Was Issued

    Since we issued AD 86-17-05 R1, we have received reports indicating 
that the frame of the No. 3 cargo door cutout was severed on two Model 
727-200 series airplanes. Both airplanes had accumulated approximately 
24,500 total flight cycles (i.e., approximately 4,800 flight cycles 
fewer than the threshold specified in AD 86-17-05 R1 for the initial 
inspection of the frame.) We have determined that this damage was a 
result of fatigue cracking. Cracking of the forward frame of the No. 3 
cargo door cutout, if not corrected, can result in failure of the 
forward frame of the No. 3 cargo door cutout and consequent rapid 
decompression of the airplane.

Other Relevant Rulemaking

    Also since the issuance of AD 86-17-05 R1, we issued AD 90-06-09, 
amendment 39-6488 (55 FR 8370, March 7, 1990), for certain Boeing Model 
727 series airplanes. That AD requires certain structural modifications 
including a frame reinforcement preventative modification of the 
forward frame of the No. 3 cargo door cutout. Boeing Alert Service 
Bulletin 727-53A0169, Revision 1, dated March 28, 1986; Revision 2, 
dated May 23, 1986; Revision 3, dated June 11, 1987; and Revision 4, 
dated January 21, 1989; are referenced in Boeing Document D6-54860, 
Revision C, dated December 11, 1989 (which is referenced as the 
appropriate source of service information for accomplishing the 
structural modifications in AD 90-06-09) as acceptable sources of 
service information for accomplishing the frame reinforcement 
preventative modification of the forward frame of the No. 3 cargo door 
cutout. Doing the frame reinforcement preventative modification of the 
forward frame of the No. 3 cargo door cutout, as required by paragraph 
A. of AD 90-06-09, terminates the repetitive inspections required by 
this proposed AD.

Relevant Service Information

    We have reviewed Boeing Service Bulletins 727-53A0169, Revision 5, 
dated November 2, 1989; and Revision 6, dated September 28, 2002. The 
service bulletins describe procedures for an initial penetrant or 
visual inspection of the forward and aft sides of the forward frame of 
the No. 3 cargo door cutout, including a portion of the exterior skin, 
frame web, and inner flanges, to find cracking; and related 
investigative and corrective actions, if necessary. The related 
investigative actions include performing repetitive inspecting if no 
crack is found and following repair of any crack that is found. The 
corrective actions include contacting Boeing for repair instructions 
for any crack found in the skin and certain cracks found in the frame; 
replacing any cracked segment of the frame with a new or serviceable 
segment, or repairing any crack found in the frame and reporting 
certain information to Boeing following the repair; and inspections for 
repairs made previously. The service bulletin also describes procedures 
for a frame reinforcement preventative modification of the forward 
frame of the No. 3 cargo door cutout that would eliminate the need for 
the repetitive inspections. Accomplishing the actions specified in the 
service information is intended to adequately address the unsafe 
condition.

FAA's Determination and Requirements of the Proposed AD

    The unsafe condition described previously is likely to exist or 
develop on other airplanes of the same type design. We are proposing to 
supersede AD 86-17-05 R1. This proposed AD would continue to require 
initial and repetitive inspections to find cracking in the forward 
frame of the No. 3 cargo door cutout; and corrective actions, if 
necessary. This proposed AD would reduce the compliance time for the 
initial inspections and add an optional method of inspection for both 
the initial and repetitive inspections. This proposed AD would also add 
an initial and repetitive inspections of an additional inspection area, 
and repair if necessary. Additionally, this proposed AD would clarify 
that the previously optional structural modification is now required by 
other rulemaking. This proposed AD would also require you to use the 
service information described previously to perform these actions, 
except as discussed under ``Differences Between the Proposed AD and 
Service Information.''

Differences Between the Proposed AD and Service Information

    The service bulletin specifies that you may contact the 
manufacturer for instructions on how to repair certain conditions, but 
this proposed AD would require repairing those conditions in one of the 
following ways:
     Using a method that we approve; or
     Using data that meet the certification basis of the 
airplane, and that have been approved by an Authorized Representative 
for the Boeing Commercial Airplanes Delegation Option Authorization 
Organization whom we have authorized to make those findings.
    Boeing Service Bulletin 727-53A0169, Revision 6, dated September 
28, 2002, only specifies a ``visual inspection'' (in addition to the 
penetrant inspection) for cracking of the forward frame of the No. 3 
cargo door cutout. We have determined that the procedures for this 
inspection in the service bulletin should be described as a ``detailed 
inspection.'' We have included Note 1 in this AD to define this type of 
inspection.
    Additionally, the service bulletin describes procedures for 
accomplishing a structural modification that would terminate the 
repetitive inspections also described in that service bulletin. The 
service bulletin recommends accomplishing the structural modification 
prior to an airplane accumulating 60,000 total flight cycles. We have 
determined that this proposed AD should not contain a requirement for 
that terminating structural modification, because we have previously 
issued AD 90-06-09, which currently requires that structural 
modification for the affected airplanes.
    Although the Accomplishment Instructions of the service bulletin 
describe procedures for submitting inspection findings to Boeing, we 
are not requiring that action in this proposed AD.

Clarification of Items Referenced in the Service Bulletin

    Paragraph 3.B.7.c. of the Accomplishment Instructions and Step 1 of 
Figure 2 of Boeing Service Bulletin 727-53A0169, Revision 6, dated 
September 28, 2002, refer to ``Detail 1'' and ``Detail 2.'' However, in 
the drawing portion of Figure 2, those details are labeled ``Detail A'' 
and Detail ``B.'' Therefore, when instructed to refer to Detail 1 of 
Figure 2, operators should refer to Detail A; when instructed to refer 
to Detail 2 of Figure 2, operators should refer to Detail B. We have 
learned that Boeing intends to publish an information notice to inform 
operators of this issue.

[[Page 11347]]

Changes to Existing AD

    This proposed AD would retain the requirements of AD 86-17-05 R1 
(including the requirements of AD 86-17-05). Since AD 86-17-05 R1 was 
issued, the AD format has been revised, and certain paragraphs have 
been rearranged. As a result, the corresponding paragraph identifiers 
have changed in this proposed AD, as listed in the following table:

                      Revised Paragraph Identifiers
------------------------------------------------------------------------
                                            Corresponding requirement in
       Requirement in AD 86-17-05 R1              this  proposed AD
------------------------------------------------------------------------
Paragraph A...............................  Paragraph (f).
Paragraph B...............................  Paragraph (g).
Paragraph C...............................  Paragraph (h).
Paragraph D...............................  Paragraph (n).
------------------------------------------------------------------------

    We have removed all references to ``later FAA-approved revisions of 
the applicable service bulletin'' in the ``Requirements of AD 86-17-05 
R1 With Reduced Threshold and New Optional Inspection Method,'' to be 
consistent with FAA policy. We cannot use the phrase, ``or later FAA-
approved revisions,'' in ADs because it violates Office of the Federal 
Register regulations for approving materials that are incorporated by 
reference. However, in paragraph (m) of this proposed AD, we are giving 
operators credit for actions done before the effective date of this AD 
in accordance with Revision 2, dated May 23, 1986; Revision 3, dated 
June 11, 1987; Revision 4, dated January 21, 1988; and Revision 5, 
dated November 2, 1989, of Boeing Service Bulletin 727-53A0169. We may 
decide to approve later revisions of the service bulletin as an 
alternative method of compliance with this proposed AD, as provided by 
paragraph (p) of this proposed AD.
    We have also changed the term ``landings'' in the ``Requirements of 
AD 86-17-05 R1 With Reduced Threshold and New Optional Inspection 
Method,'' to ``flight cycles'' to be consistent with the new 
requirements of this proposed AD. This change has no effect on the 
compliance times specified in the ``Requirements of AD 86-17-05 R1 With 
Reduced Threshold and New Optional Inspection Method.''

Costs of Compliance

    There are about 269 airplanes of the affected design in the 
worldwide fleet. The new requirements of this AD add no additional 
economic burden. The current costs for U.S. operators to comply with 
this proposed AD are repeated for the convenience of affected 
operators, as follows:

                                                                     Estimated Costs
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                                                                                                                    Number of
                                                      Average                                                         U.S.-
                Action                  Work hours   labor rate         Parts cost           Cost per airplane      registered         Fleet cost
                                                      per hour                                                      airplanes
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Inspections (required by AD 86-17-05             6          $65  None...................  $390, per inspection             166  $64,740, per inspection
 R1), per inspection cycle.                                                                cycle.                                cycle.
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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 have 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 that the 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. See the ADDRESSES section for a location 
to examine the regulatory evaluation.

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 removing amendment 39-5714 (52 FR 
32534, August 28, 1987) and adding the following new airworthiness 
directive (AD):

Boeing: Docket No. FAA-2006-24073; Directorate Identifier 2002-NM-
272-AD.

Comments Due Date

    (a) The Federal Aviation Administration must receive comments on 
this AD action by April 21, 2006.

Affected ADs

    (b) This AD supersedes AD 86-17-05 R1.

Applicability

    (c) This AD applies to Boeing Model 727-200 series airplanes, 
certificated in any category, equipped with a No. 3 cargo door, as 
identified in Boeing Service Bulletin 727-53A0169, Revision 2, dated 
May 23, 1986.

Unsafe Condition

    (d) This AD results from additional reports of cracking in the 
forward frame of the No. 3 cargo door cutout. We are issuing this AD

[[Page 11348]]

to detect and correct cracking of the forward frame and fuselage 
skin of the No. 3 cargo door cutout, which could result in failure 
of the frame and consequent rapid decompression of the airplane.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Requirements of AD 86-17-05 RL With Reduced Threshold and New Optional 
Inspection Method

Inspections

    (f) At the earlier of the times specified in paragraphs (f)(1) 
and (f)(2) of this AD: Do a penetrant or detailed inspection of the 
forward frame of the No. 3 cargo door cutout for cracking, in 
accordance with paragraph C. of the Accomplishment Instructions of 
Boeing Service Bulletin 727-53A0169, Revision 2, dated May 23, 1986. 
After the effective date of this AD, the penetrant or detailed 
inspection must be done in accordance with paragraph 3.B.3. of the 
Accomplishment Instructions of Boeing Service Bulletin 727-53A0169, 
Revision 6, dated September 28, 2002. If any cracking is found, 
repair in accordance with paragraph (h) or (l) of this AD, as 
applicable. Repeat the inspection at intervals not to exceed 2,200 
flight cycles, until the preventative modification specified in 
paragraph (n) of this AD is done.
    (1) Within the next 300 flight cycles after September 3, 1987 
(the effective date of AD 86-17-05 R1), or prior to accumulating 
29,000 total flight cycles, whichever occurs later, unless 
accomplished within the last 1,900 flight cycles.
    (2) Prior to accumulating 18,000 total flight cycles, or within 
2,200 flight cycles after the effective date of this AD, whichever 
occurs later.
    (g) At the earlier of the times specified in paragraphs (g)(1) 
and (g)(2) of this AD: Do a detailed inspection of the forward frame 
of the No. 3 cargo door cutout for cracking, in accordance with 
paragraphs D. and E. of the Accomplishment Instructions of Boeing 
Service Bulletin 727-53A0169, Revision 2, dated May 23, 1986. After 
the effective date of this AD, the detailed inspection must be done 
in accordance with paragraphs 3.B.4. and 3.B.5. of the 
Accomplishment Instructions of Boeing Service Bulletin 727-53A0169, 
Revision 6, dated September 28, 2002. If any cracking is found, 
repair in accordance with paragraph (h) or (l) of this AD, as 
applicable. Repeat the inspection at intervals not to exceed 2,200 
flight cycles, until the preventative modification specified in 
paragraph (n) of this AD is done.
    (1) Within the next 300 flight cycles after September 3, 1987, 
or prior to accumulating 35,000 total flight cycles, whichever 
occurs later, unless accomplished within the last 1,900 flight 
cycles.
    (2) Prior to accumulating 18,000 total flight cycles, or within 
2,200 flight cycles after the effective date of this AD, whichever 
occurs later.

Repair

    (h) Before further flight, repair any crack in the forward frame 
of the No. 3 cargo door cutout found before the effective date of 
this AD during any inspection required by paragraph (f) or (g) of 
this AD, in accordance with paragraph G. of the Accomplishment 
Instructions in Boeing Service Bulletin 727-53A0169, Revision 2, 
dated May 23, 1986. Repeat the inspections specified in paragraphs 
(f) and (g) of this AD at intervals not to exceed 2,200 flight 
cycles, for all areas of the forward frame not covered by the 
repair, in accordance with the Accomplishment Instructions of 
paragraphs C., D., and E. of Boeing Service Bulletin 727-53A0169, 
Revision 2, dated May 23, 1986.

New Requirements of This AD

Inspection of Repairs of the Frame Done Before the Effective Date 
of the AD

    (i) For any repair to the forward frame of the No. 3 cargo door 
cutout done, as required by paragraph (h) of this AD, before the 
effective date of this AD: Within 18,000 flight cycles following the 
repair, or 2,200 flight cycles after the effective date of this AD, 
whichever occurs later, do a detailed inspection of the repair for 
cracking in accordance with the Accomplishment Instructions of 
Boeing Service Bulletin 727-53A0169, Revision 6, dated September 28, 
2002. Thereafter, repeat the inspection at intervals not to exceed 
2,200 flight cycles, until the preventative modification specified 
in paragraph (n) of this AD is done.

    Note 1: For the purposes of this AD, a detailed inspection is: 
``An intensive examination of a specific item, installation, or 
assembly to detect damage, failure, or irregularity. Available 
lighting is normally supplemented with a direct source of good 
lighting at an intensity deemed appropriate. Inspection aids such as 
mirror, magnifying lenses, etc., may be necessary. Surface cleaning 
and elaborate procedures may be required.''

New Inspections of Skin Surrounding the Frame

    (j) Prior to the accumulation of 18,000 total flight cycles, or 
within 2,200 flight cycles after the effective date of this AD, 
whichever occurs later: Do a penetrant or detailed inspection for 
cracking of the fuselage skin of the No. 3 cargo door cutout between 
stringers S-24 and S-27, in accordance with paragraph 3.B.3. of the 
Accomplishment Instructions of Boeing Service Bulletin 727-53A0169, 
Revision 6, dated September 28, 2002. Repeat the inspection at 
intervals not to exceed 2,200 flight cycles, until the preventative 
modification specified in paragraph (n) of this AD is done.

Repair of Cracked Skin

    (k) If any crack is found in the fuselage skin during any 
inspection required by paragraph (j) of this AD: Before further 
flight, repair the crack using a method approved in accordance with 
the procedures specified in paragraph (p) of this AD.

Repair of Cracked Frames and Post-Repair Inspections

    (l) If, after the effective date of this AD, any crack is found 
in the forward frame of the No. 3 cargo door cutout during any 
inspection required by paragraph (f), (g), or (i) of this AD: Before 
further flight, do the actions specified in paragraph (l)(1), 
(l)(2), or (l)(3) of this AD, as applicable. Inspect the repair 
within 18,000 flight cycles following the repair, in accordance with 
paragraphs 3.B.4. and 3.B.5. of the Accomplishment Instructions of 
Boeing Service Bulletin 727-53A0169, Revision 6, dated September 28, 
2002. Thereafter, repeat the inspections at intervals not to exceed 
2,200 flight cycles, until the preventative modification specified 
in paragraph (n) of this AD is done.
    (1) If cracks have not severed the inner flange, do an interim 
repair using a method approved in accordance with the procedures 
specified in paragraph (p) of this AD.
    (2) Repair the crack in accordance with paragraph 3.B.7.b. of 
the Accomplishment Instructions of Boeing Service Bulletin 727-
53A0169, Revision 6, dated September 28, 2002.
    (3) Replace the cracked segment of the frame with a new or 
serviceable component and install the frame reinforcement 
preventative modification, in accordance with paragraph 3.B.7.c. of 
the Accomplishment Instructions of Boeing Service Bulletin 727-
53A0169, Revision 6, dated September 28, 2002. This action 
terminates the requirements of this AD.

Repairs Done According to Previous Issues of the Service Bulletin

    (m) Inspections and repairs done before the effective date of 
this AD in accordance with Boeing Service Bulletin 727-53A0169, 
Revision 2, dated May 23, 1986; Revision 3, dated June 11, 1987; 
Revision 4, dated January 21, 1988; and Revision 5, dated November 
2, 1989, are acceptable for compliance with the corresponding 
requirements of paragraphs (h), (k), and (l) of this AD, as 
applicable.

Terminating Modification Required by AD 90-06-09

    (n) At the same time as the applicable inspections provided in 
paragraphs (f), (g), (i), and (j) of this AD are accomplished, doing 
the frame reinforcement preventative modification required by 
paragraph A. of AD 90-06-09 or the frame reinforcement preventative 
modification specified in Figure 2 of Boeing Service Bulletins 727-
53A0169, Revision 5, dated November 2, 1989; and Revision 6, dated 
September 28, 2002; terminates the requirements of this AD. 
Paragraph A. of AD 90-06-09 references Boeing Document D6-54860, 
Revision C, dated December 11, 1989, ``Aging Airplane Structural 
Modification Program--Model 727'' as the appropriate source of 
service information for accomplishing the frame reinforcement 
preventative modification (along with numerous other structural 
modifications required by paragraph A. of AD 90-06-09).

Information Submission

    (o) Although the service bulletins referenced in this AD specify 
to submit

[[Page 11349]]

certain information to the manufacturer, this AD does not include 
that requirement.

Alternative Methods of Compliance (AMOCs)

    (p) (1) The Manager, Seattle ACO, has the authority to approve 
AMOCs for this AD, if requested in accordance with the procedures 
found in 14 CFR 39.19.
    (2) Before using any AMOC approved in accordance with Sec.  
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair required by this AD, if it is approved by an 
Authorized Representative for the Boeing Commercial Airplanes 
Delegation Option Authorization Organization who has been authorized 
by the Manager, Seattle ACO, to make those findings. For a repair 
method to be approved, the repair must meet the certification basis 
of the airplane, and the approval must specifically refer to this 
AD.
    (4) An AMOC approved previously in accordance with AD 86-17-05 
R1, is approved as an AMOC with the corresponding requirements and 
provisions of this AD.

    Issued in Renton, Washington, on February 23, 2006.
Michael J. Kaszycki,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E6-3221 Filed 3-6-06; 8:45 am]
BILLING CODE 4910-13-P