[Federal Register Volume 59, Number 127 (Tuesday, July 5, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-16158]


[[Page Unknown]]

[Federal Register: July 5, 1994]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 94-NM-67-AD]

 

Airworthiness Directives; Raytheon Corporate Jets Model BAe 125-
1000A Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes the adoption of a new airworthiness 
directive (AD) that is applicable to certain Raytheon Corporate Jets 
Model BAe 125-1000A series airplanes. This proposal would require 
modification of the galley feeder cables and toilet services fuse. This 
proposal is prompted by a report that the gauge size of the existing 
galley feeder cable is not compatible with the rating of the currently 
used toilet services fuse. The actions specified by the proposed AD are 
intended to ensure that the subject cables are compatible with the 
toilet services fuse in order prevent overheating of the cables, which 
could result in smoke and fire in the cabin.

DATES: Comments must be received by September 22, 1994.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-103, 
Attention: Rules Docket No. 94-NM-67-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 Raytheon Corporate Jets, Inc., Customer Support 
Department, Adams Field, P.O. Box 3356, Little Rock, Arkansas 72203. 
This information may be examined at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue SW., Renton, Washington.

FOR FURTHER INFORMATION CONTACT: William Schroeder, Aerospace Engineer, 
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate, 
1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (206) 
227-1112; fax (206) 227-1100.

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 94-NM-67-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. 94-NM-67-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    The Civil Aviation Authority (CAA), which is the airworthiness 
authority for the United Kingdom, recently notified the FAA that an 
unsafe condition may exist on certain Raytheon Corporate Jets Model BAe 
125-1000A series airplanes. The CAA advises that the gauge size of the 
galley feeder cables installed on these airplanes is not compatible 
with the rating of the toilet services fuses. In the event of a fault 
condition, the incompatibility of these items could result in the 
cables becoming overheated, which could lead to the generation of smoke 
and fire in the cabin. There have been no in-service incidents of such 
faults or consequent smoke and fire, however.
    Hawker-Raytheon Corporate Jets has issued Service Bulletin SB.25-
75-25A698A&B, dated February 10 1994, that describes procedures for 
installing Modification 25A698A&B on airplanes that were furnished with 
an ``open plan'' galley. This modification consists of changing the 
gauge size of the galley feeder cables (from fuses F1 and F2 on panel 
WFA to the left and right galley) from size 10 to size 8; changing the 
toilet services fuse F3 from 50A to 30A amperage; and adding a new 20A 
fuse to the left and right galley.
    Hawker-Raytheon Corporate Jets also has issued Service Bulletin 
SB.25-75-25A699A, dated February 10 1994, that describes procedures for 
installing Modification 25A699A on airplanes that were furnished with a 
``traditional'' galley. This modification consists of changing the 
gauge size of the galley feeder cables (from fuses F1 and F2 on panel 
WFA to the galley) from size 10 to size 8; changing the toilet services 
fuse F3 from 50A to 30A amperage; and adding a new 20A fuse to the 
galley.
    The CAA classified both of these service bulletins as mandatory.
    This airplane model is manufactured in the United Kingdom and is 
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 CAA has 
kept the FAA informed of the situation described above. The FAA has 
examined the findings of the CAA, 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.
    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 require modification of the 
galley feeder cables and toilet services fuses. The actions would be 
required to be accomplished in accordance with the service bulletins 
described previously.
    The FAA estimates that 4 airplanes of U.S. registry would be 
affected by this proposed AD, that it would take approximately 16 work 
hours per airplane to accomplish the proposed actions, and that the 
average labor rate is $55 per work hour. Required parts would cost 
approximately $500 per airplane. Based on these figures, the total cost 
impact of the proposed AD on U.S. operators is estimated to be $5,520, 
or $1,380 per airplane.
    The total 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.
    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. App. 1354(a), 1421 and 1423; 49 U.S.C. 
106(g); and 14 CFR 11.89.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

Raytheon Corporate Jets, Inc.: Docket 94-NM-67-AD.

    Applicability: Model BAe 125-1000A series airplanes; as listed 
in Hawker-Raytheon Corporate Jets Service Bulletin SB.25-76-
25A698A&B, dated February 10, 1994, and Hawker-Raytheon Corporate 
Jets Service Bulletin SB.25-76-25A699A, dated February 10, 1994; 
certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent smoke and fire in the cabin due to overheating of 
galley cables, accomplish the following: -
    (a) For airplanes listed in Hawker-Raytheon Corporate Jets 
Service Bulletin SB.25-76-25A698A&B, dated February 10, 1994: Within 
100 hours time-in-service after the effective date of this AD, 
install Modification 25A698A&B in accordance with that service 
bulletin. -
    (b) For airplanes listed in Hawker-Raytheon Corporate Jets 
Service Bulletin SB.25-76-25A699A, dated February 10, 1994: Within 
100 hours time-in-service after the effective date of this AD, 
install Modification 25A699A in accordance with that service 
bulletin. -
    (c) 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, Standardization Branch, ANM-113, 
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, 
Standardization Branch, ANM-113.

    -Note: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Standardization Branch, ANM-113.

    -(d) 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 June 28, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-16158 Filed 7-1-94; 8:45 am]
BILLING CODE 4910-13-U