[Federal Register Volume 62, Number 109 (Friday, June 6, 1997)]
[Proposed Rules]
[Pages 31020-31021]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-14770]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 96-NM-206-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 767 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 series 
airplanes. The proposal would require replacement of the existing 
retaining bolt of the attendant seat lap belt with a new bolt and a 
washer. This proposal is prompted by a report indicating that, due to a 
missing washer, the belt end fittings of the double flight attendant 
seats can become loose. The actions specified by the proposed AD are 
intended to ensure that a washer between the bolt head and bushing is 
installed. A missing washer could allow movement of the belt end 
fittings, which can cause the restraint belts to release and, 
consequently, result in injury to the flight attendants.

DATES: Comments must be received by July 17, 1997.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-103, 
Attention: Rules Docket No. 96-NM-206-AD, 1601 Lind Avenue, SW., 
Renton, Washington 98055-4056. Comments may be inspected at this 
location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except 
Federal holidays.
    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: Monica Nemecek, Aerospace Engineer, 
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 
1601 Lind Avenue, SW., Renton, Washington; telephone (425) 227-2773; 
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 notice may be changed in 
light of the comments received.
    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 notice must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 96-NM-206-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-103, Attention: Rules 
Docket No. 96-NM-206-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    The FAA has received a report indicating that, on certain Boeing 
Model 767 series airplanes, the restraint anchor configuration is 
incorrect for the lap restraint belts of the double flight attendant 
seats that are wall mounted. Investigation revealed that certain types 
of restraint belts do not have a washer between the bolt head and 
bushing as part of the anchor configuration. Without the washer, 
movement of the belt end fittings can cause the restraint belts to 
release. This condition, if not corrected, could result in injury to 
the flight attendants.

Explanation of Relevant Service Information

    The FAA has reviewed and approved Boeing Service Bulletin 767-25-
0217, dated January 13, 1994, which describes procedures for 
replacement of the existing retaining bolt of the attendant seat lap 
belt with a new bolt and a washer. Accomplishment of these actions will 
ensure that the restraint belts of the double flight attendant seats 
that are wall mounted cannot inadvertently come loose from the end 
fittings.

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, for 
certain airplanes, the proposed AD would require

[[Page 31021]]

replacement of the existing retaining bolt of the attendant seat lap 
belt with a new bolt and a washer. The actions would be required to be 
accomplished in accordance with the service bulletin described 
previously.

Cost Impact

    There are approximately 55 double flight attendant seats installed 
on 35 Boeing Model 767 series airplanes of the affected design in the 
worldwide fleet. Each of these airplanes has 1 or 2 seats. The FAA 
estimates that 40 double flight attendant seats installed on 20 
airplanes of U.S. registry would be affected by this proposed AD, that 
it would take approximately 1 work hour per seat to accomplish the 
proposed actions, and that the average labor rate is $60 per work hour. 
Required parts would cost approximately $1 per seat. Based on these 
figures, the cost impact of the proposed AD on U.S. operators is 
estimated to be $61 per seat.
    The cost impact figure discussed above is based on assumptions that 
no operator has yet accomplished any of the proposed requirements of 
this AD action, and that no operator would accomplish those actions in 
the future if this AD were not adopted.

Regulatory Impact

    The regulations proposed herein would not have substantial direct 
effects 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, in 
accordance with Executive Order 12612, it is determined that this 
proposal would not have sufficient federalism implications to warrant 
the preparation of a Federalism Assessment.
    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 96-NM-206-AD.

    Applicability: Model 767 series airplanes, as listed in Boeing 
Service Bulletin 767-25-0217, dated January 13, 1994; equipped with 
a seat base assembly having part number 414T2025; certificated in 
any category:

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
otherwise 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 ensure that a washer between the bolt head and bushing is 
installed in the restraint anchor configuration of the double flight 
attendants seats that are wall mounted, accomplish the following:
    (a) Within 90 days after the effective date of this AD, replace 
the existing retaining bolt of the attendant seat lap belt with a 
new bolt and a washer, in accordance with Boeing Service Bulletin 
767-25-0217, dated January 13, 1994.
    (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, Transport Airplane Directorate. Operators shall 
submit their requests through an appropriate FAA Principal 
Maintenance Inspector, who may add comments and then send it to the 
Manager, 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.

    (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 May 30, 1997.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 97-14770 Filed 6-5-97; 8:45 am]
BILLING CODE 4910-13-U