[Federal Register: December 11, 2002 (Volume 67, Number 238)]
[Proposed Rules]
[Page 76120-76121]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr11de02-11]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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[[Page 76120]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2002-NM-187-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 767-200 and 767-300 Series
Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: This document proposes the adoption of a new airworthiness
directive (AD) that is applicable to certain Boeing Model 767-200 and
767-300 series airplanes. This proposal would require modification of
the installation of the aft pressure bulkhead-to-floor insulation
blankets. This action is necessary to avoid interference with venting
during a rapid decompression in the bulk cargo compartment; such
interference could result in damage to the floor structure as well as
damage to certain control cables leading to the empennage, leading to
reduced controllability of the airplane. This action is intended to
address the identified unsafe condition.
DATES: Comments must be received by January 27, 2003.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 2002-NM-187-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-187-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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle,
Washington, 98124-2207. This information may be examined at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington.
FOR FURTHER INFORMATION CONTACT: Suzanne Masterson, Aerospace Engineer,
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
227-2772; fax (425) 227-1181.
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-187-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-187-AD, 1601 Lind Avenue, SW., Renton, Washington
98055-4056.
Discussion
The FAA has received a report that, during the structural integrity
certification of the Model 767-400ER series airplane, the manufacturer
found that the seal created by the insulation blankets in the aft
pressure bulkhead-to-floor area did not allow the airplane to meet
requirements for decompression. This condition, if not corrected, could
interfere with venting during a rapid decompression in the bulk cargo
compartment; such interference could result in damage to the floor
structure as well as damage to certain control cables leading to the
empennage, possibly leading to reduced controllability of the airplane.
As a result of this finding, the configuration of the insulation
blankets in the aft pressure bulkhead-to-floor area was changed in
production of the Model 767-400ER series airplanes. The same change was
also made to the Model 767-200 and 767-300 series airplanes. However,
for those airplanes which had already been delivered, the configuration
of the insulation blankets in the aft pressure bulkhead-to-floor area
may prevent venting during a rapid decompression in the bulk cargo
area. This proposed AD would apply to those airplanes.
Explanation of Relevant Service Information
The FAA has reviewed and approved Boeing Service Bulletin 767-
25A0300, Revision 1, dated May 2, 2002, which describes procedures for
modification of the installation of the aft pressure bulkhead-to-floor
insulation blankets. Accomplishment of the actions specified in the
service bulletin is intended to adequately address the identified
unsafe condition.
[[Page 76121]]
Explanation of Requirements of Proposed Rule
Since an unsafe condition has been identified that is likely to
exist or develop on other products of this same type design, the
proposed AD would require accomplishment of the actions specified in
the service bulletin described previously.
Clarification of Compliance Time
The service bulletin recommends that the modification be
accomplished during the next heavy maintenance check when the aft
galleys are removed; such checks are performed approximately every 6
years. This NPRM proposes that the modification be accomplished within
5 years of the effective date of the final rule. Although the
compliance time is stated differently in the two documents, the period
of time proposed in this NPRM is essentially the same as that in the
service bulletin.
Cost Impact
There are approximately 729 airplanes of the affected design in the
worldwide fleet. The FAA estimates that 311 airplanes of U.S. registry
would be affected by this proposed AD, that it would take approximately
3 work hours per airplane to accomplish the proposed modification, and
that the average labor rate is $60 per work hour. Required parts would
cost approximately $397 per airplane. Based on these figures, the cost
impact of the proposed AD on U.S. operators is estimated to be
$179,447, or $577 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 proposed 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. The manufacturer may
cover the cost of replacement parts associated with this proposed AD,
subject to warranty conditions. Manufacturer warranty remedies may also
be available for labor costs associated with this proposed AD. As a
result, the costs attributable to the proposed AD may be less than
stated above.
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:
Boeing: Docket 2002-NM-187-AD.
Applicability: Model 767-200 and -300 series airplanes, having
line numbers 1 through 757 inclusive, 759 through 768 inclusive, 770
through 772 inclusive, 774 through 780 inclusive, 786, and 788
through 790 inclusive; 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. 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 interference with venting during a rapid
decompression in the bulk cargo compartment, which could result in
damage to the floor structure as well as damage to certain control
cables leading to the empennage, leading to reduced controllability
of the airplane, accomplish the following:
Modification
(a) Within 60 months of the effective date of this AD: Modify
the installation of the aft pressure bulkhead-to-floor insulation
blankets, in accordance with the Accomplishment Instructions of
Boeing Service Bulletin 767-25A0300, Revision 1, dated May 2, 2002.
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, Seattle 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, Seattle ACO.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Seattle ACO.
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.
Issued in Renton, Washington, on December 4, 2002.
Vi L. Lipski, Manager,
Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 02-31179 Filed 12-10-02; 8:45 am]
BILLING CODE 4910-13-P