[Federal Register Volume 75, Number 214 (Friday, November 5, 2010)]
[Proposed Rules]
[Pages 68245-68246]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-28080]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-1043; Directorate Identifier 2010-NM-200-AD]
RIN 2120-AA64
Airworthiness Directives; McDonnell Douglas Corporation Model MD-
90-30 Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all
McDonnell Douglas Model MD-90-30 airplanes. This proposed AD would
require installing new fire handle shutoff system wiring. This proposed
AD was prompted by a possible latent failure in the fire handle shutoff
relay circuit due to a lack of separation between engine wires. We are
proposing this AD to minimize the possibility of a multiple engine
shutdown due to single fire handle activation.
DATES: We must receive comments on this proposed AD by December 20,
2010.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
Hand Delivery: Deliver to Mail address above 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, Attention: Data & Services Management,
3855 Lakewood Boulevard, MC D800-0019, Long Beach, California 90846-
0001; telephone 206-544-5000, extension 2; fax 206-766-5683; e-mail
[email protected]; Internet https://www.myboeingfleet.com. You may
review copies of the referenced service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the availability of this material at the
FAA, call 425-227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES
section. Comments will be available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT: William S. Bond, Aerospace Engineer,
Los Angeles ACO--Propulsion Branch, ANM-140L, FAA Los Angeles Aircraft
Certification Office, 3960 Paramount Blvd., Lakewood, CA 90712;
telephone: (562) 627-5253; fax: (562) 627-5210; e-mail:
[email protected].
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2010-1043;
Directorate Identifier 2010-NM-200-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
We have received a report from Boeing identifying a potential
unsafe condition. The engine fire shutoff handles on the MD-90
airplanes are designed to shutoff fuel at both the wing spar's
mechanical fuel fire shutoff valve and the electrical solenoid
controlled engine fuel shutoff valve in the engine Hydromechanical Unit
(HMU). Due to the lack of separation between engine wires, a latent
failure in the fire handle fuel shutoff relay circuit has the potential
of causing a dual engine shutdown in the event any single engine fuel
fire shutoff handle is activated. Separating the fire handle shutoff
system wiring will minimize the possibility of multiple engine shutdown
due to a single event. This condition, if not corrected, has the
potential of causing a dual engine shutdown in the event of any single
engine fuel fire shutoff handle activation.
Relevant Service Information
We reviewed Boeing Alert Service Bulletin MD90-74A002, dated August
17, 2010. The service information describes procedures for installing
new fire handle shutoff system wiring.
FAA's Determination
We are proposing this AD because we evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
Proposed AD Requirements
This proposed AD would require accomplishing the actions specified
in the service information described previously.
Costs of Compliance
We estimate that this proposed AD will affect 25 airplanes of U.S.
registry.
We estimate the following costs to comply with this proposed AD:
Estimated Costs
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Cost on U.S.
Action Labor cost Parts cost Cost per product operators
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Wiring change.................... 8 work-hour x $85 $489 $1,169 $29,225
per hour = $680.
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[[Page 68246]]
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 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 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),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, 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 adding the following new
airworthiness directive (AD):
McDonnell Douglas Corporation: Docket No. FAA-2010-1043; Directorate
Identifier 2010-NM-200-AD.
Comments Due Date
(a) We must receive comments by December 20, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to all McDonnell Douglas Corporation Model
MD-90-30 airplanes, certificated in any category.
Subject
(d) Joint Aircraft System Component (JASC)/Air Transport
Association (ATA) of America Code 74: Ignition system.
Unsafe Condition
(e) This AD was prompted by a possible latent failure in the
fire handle shutoff relay circuit due to a lack of separation
between engine wires. We are proposing this AD to minimize the
possibility of a multiple engine shutdown due to single fire handle
activation.
Compliance
(f) Comply with this AD within the compliance times specified,
unless already done.
Wire Installation
(g) Within 4,200 flight hours after the effective date of this
AD, install new fire handle shutoff system wiring, in accordance
with the Accomplishment Instructions of Boeing Alert Service
Bulletin MD90-74A002, dated August 17, 2010.
Alternative Methods of Compliance (AMOCs)
(h)(1) The Manager, Los Angeles Aircraft Certification Office,
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. In accordance with 14
CFR 39.19, send your request to your principal inspector or local
Flight Standards District Office, as appropriate. If sending
information directly to the manager of the ACO, send it to the
attention of the person identified in the Related Information
section of this AD.
(2) Before using any approved AMOC, notify your Principal
Maintenance Inspector or Principal Avionics Inspector, as
appropriate, or lacking a principal inspector, your local Flight
Standards District Office.
Related Information
(i) For more information about this AD, contact William S. Bond,
Aerospace Engineer, Los Angeles ACO--Airframe Branch, ANM-140L, FAA
Los Angeles Aircraft Certification Office, 3960 Paramount Blvd,
Lakewood, CA 90712-4137; telephone: (562) 627-5253; fax: (562) 627-
5210; e-mail: [email protected].
(j) For service information identified in this AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management,
3855 Lakewood Boulevard, MC D800-0019, Long Beach, California 90846-
0001; telephone 206-544-5000, extension 2; fax 206-766-5683; e-mail
[email protected]; Internet https://www.myboeingfleet.com. You
may review copies of the referenced service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the availability of this material at
the FAA, call 425-227-1221.
Issued in Renton, Washington, on October 21, 2010.
Michael Kaszycki,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-28080 Filed 11-4-10; 8:45 am]
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