[Federal Register: July 27, 2004 (Volume 69, Number 143)]
[Rules and Regulations]
[Page 44594-44595]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr27jy04-9]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2003-NM-172-AD; Amendment 39-13739; AD 2004-15-05]
RIN 2120-AA64
Airworthiness Directives; BAE Systems (Operations) Limited Model
BAe 146 and Avro 146-RJ Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain BAE Systems (Operations) Limited Model BAe 146
and Avro 146-RJ series airplanes, that requires replacing the existing
bellows inlet duct of the auxiliary power unit (APU) system with a new,
improved rectangular metallic bellows inlet duct. This action is
necessary to prevent air from the APU bay being ingested into the
flight deck and passenger cabin resulting in poor air quality and, if
the air is contaminated, possible incapacitation of the flightcrew and
passengers. This action is intended to address the identified unsafe
condition.
DATES: Effective August 31, 2004.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of August 31, 2004.
ADDRESSES: The service information referenced in this AD may be
obtained from British Aerospace Regional Aircraft American Support,
13850 Mclearen Road, Herndon, Virginia 20171. This information may be
examined at the Federal Aviation Administration (FAA), Transport
Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW., Renton,
Washington; or at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA,
call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html
.
FOR FURTHER INFORMATION CONTACT: Todd Thompson, Aerospace Engineer,
International Branch, ANM-116, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
227-1175; fax (425) 227-1149.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an airworthiness
directive (AD) that is applicable to certain BAE Systems (Operations)
Limited Model BAe 146 and Avro 146-RJ series airplanes was published in
the Federal Register on May 27, 2004 (69 FR 30244). That action
proposed to require replacing the existing bellows inlet duct of the
auxiliary power unit (APU) system with a new, improved rectangular
metallic bellows inlet duct.
Comments
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were submitted in response
to the proposal or the FAA's determination of the cost to the public.
Conclusion
The FAA has determined that air safety and the public interest
require the adoption of the rule as proposed.
Cost Impact
The FAA estimates that 54 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 2 work hours per
airplane to accomplish the required actions, and that the average labor
rate is $65 per work hour. Required parts will cost approximately
$4,500 per airplane. Based on these figures, the cost impact of the AD
on U.S. operators is estimated to be $250,020, or $4,630 per airplane.
The cost impact figure discussed above is based on assumptions that
no operator has yet accomplished any of the 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.
Regulatory Impact
The regulations adopted herein will 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 final rule does not have federalism
implications under Executive Order 13132.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under
[[Page 44595]]
Executive Order 12866; (2) is not a ``significant rule'' under 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. A final evaluation has been prepared
for this action and it is contained in the Rules Docket. A copy of it
may be obtained from the Rules Docket at the location provided under
the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends part 39 of
the Federal Aviation Regulations (14 CFR part 39) as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
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]
0
2. Section 39.13 is amended by adding the following new airworthiness
directive:
2004-15-05 BAE Systems (Operations) Limited (Formerly British
Aerospace Regional Aircraft): Amendment 39-13739. Docket 2003-NM-
172-AD.
Applicability: Model 146 series airplanes with Modification
HCM30027A, HCM36019A, or HCM30373A installed; and Model Avro 146-RJ
series airplanes with Modification HCM36019A or HCM30373A installed;
certificated in any category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent air from the auxiliary power unit (APU) bay being
ingested into the flight deck and passenger cabin resulting in poor
air quality and, if the air is contaminated, possible incapacitation
of the flightcrew and passengers, accomplish the following:
Replacement of Rubber Bellows Inlet Duct
(a) Within 24 months or 4,000 flight cycles after the effective
date of this AD, whichever is first: Replace the existing rubber
bellows inlet duct and sealing configuration of the APU system, with
a new, improved rectangular metallic bellows inlet duct, which
incorporates an improved seal and clamp configuration, per the
Accomplishment Instructions of BAE Systems (Operations) Limited
Modification Service Bulletin SB.49-036-36019E, Revision 4, dated
April 30, 2003. Although the service bulletin specifies to submit
certain information to the manufacturer, this AD does not include
such a requirement.
Alternative Methods of Compliance
(b) In accordance with 14 CFR 39.19, the Manager, International
Branch, ANM-116, Transport Airplane Directorate, FAA, is authorized
to approve alternative methods of compliance for this AD.
Incorporation by Reference
(c) The action shall be done in accordance with BAE Systems
(Operations) Limited Modification Service Bulletin SB.49-036-36019E,
Revision 4, dated April 30, 2003. This incorporation by reference
was approved by the Director of the Federal Register in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from
British Aerospace Regional Aircraft American Support, 13850 Mclearen
Road, Herndon, Virginia 20171. Copies may be inspected at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington; or at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, call (202) 741-6030, or go to: http://www. archives. gov/
federal-- register/ code-- of-- federal-- regulations/ ibr--
locations. html.
Note 1: The subject of this AD is addressed in British
airworthiness directive 007-04-2003.
Effective Date
(d) This amendment becomes effective on August 31, 2004.
Issued in Renton, Washington, on July 9, 2004.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-16673 Filed 7-26-04; 8:45 am]
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