[Federal Register Volume 59, Number 122 (Monday, June 27, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-14904]
[[Page Unknown]]
[Federal Register: June 27, 1994]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 94-NM-47-AD; Amendment 39-8945; AD 94-13-05]
Airworthiness Directives; Fokker Model F28 Mark 0100 Series
Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain Fokker Model F28 Mark 0100 series airplanes. This
action requires modification of the electrical connections in a certain
relay panel. This amendment is prompted by a report that, as a result
of a previous modification, certain electrical wires with a positive
voltage were connected to an electrical connector that is also wired to
the liftdumper system, which could negatively affect the liftdumper
system. The actions specified in this AD are intended to ensure
protection against uncommanded deployment of the liftdumper.
DATES: Effective July 12, 1994.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of July 12, 1994.
Comments for inclusion in the Rules Docket must be received on or
before August 26, 1994.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-103,
Attention: Rules Docket No. 94-NM-47-AD, 1601 Lind Avenue SW., Renton,
Washington 98055-4056.
The service information referenced in this AD may be obtained from
Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria,
Virginia 22314. This information may be examined at the FAA, Transport
Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at
the Office of the Federal Register, 800 North Capitol Street NW., suite
700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Tim Dulin, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (206)
227-2141; fax (206) 227-1320.
SUPPLEMENTARY INFORMATION: The Rijksluchtvaartdienst (RLD), which is
the airworthiness authority for the Netherlands, recently notified the
FAA that an unsafe condition may exist on certain Fokker Model F28 Mark
0100 series airplanes. The RLD advises that certain Model F28 Mark 0100
series airplanes were modified to increase air conditioning airflow at
higher altitudes by augmenting the airflow through the turbine bypass
valves. These airplanes were modified in accordance with Fokker Service
Bulletin SBF100-21-026. On some airplanes, this modification resulted
in the installation of electrical wires with a positive voltage into an
electrical connector that is also wired for the liftdumper system.
Incorporation of this modification on these airplanes could negatively
affect the liftdumper system, since only electrical wires that are
directly connected to a ground should be installed in this connector.
This condition, if not corrected, could result in reduced protection
against uncommanded deployment of the liftdumper.
Fokker has issued Service Bulletin SBF100-21-045, Revision 1, dated
November 17, 1993, that describes procedures for modification of the
electrical connections in a certain relay panel. This modification
entails disconnecting certain electrical wires from the connector in
the number 2 relay panel and connecting these wires to a different
connector. Accomplishment of this modification must be performed after
or in conjunction with Fokker Service Bulletin SBF100-21-026, in order
to ensure that only electrical wires that are directly connected to
ground are installed to the electrical connector that is also wired for
the liftdumper system.
The RLD classified Fokker Service Bulletin SBF100-21-045, as
mandatory and issued Netherlands Airworthiness Directive BLA 92-079/2
(A), dated December 24, 1993, in order to assure the continued
airworthiness of these airplanes in the Netherlands.
Fokker has also issued Service Bulletin SBF100-21-056, Revision 1,
dated November 24, 1993, which supersedes Fokker Service Bulletins
SBF100-21-026 and SBF100-21-045. Fokker Service Bulletin SBF100-21-056
describes procedures for augmentation of the flow through the turbine
bypass valves of the air conditioning system to increase the air
conditioning airflow at higher altitudes. The RLD classified this
service bulletin as optional; however, the service bulletin
incorporates the provisions of Fokker Service Bulletin SBF100-21-045,
including the instructions necessary to correct the wiring.
This airplane model is manufactured in the Netherlands and is type
certificated for operation in the United States under the provisions of
Section 21.29 of the Federal Aviation Regulations and the applicable
bilateral airworthiness agreement. Pursuant to this bilateral
airworthiness agreement, the RLD has kept the FAA informed of the
situation described above. The FAA has examined the findings of the
RLD, 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, this AD is being issued to prevent reduced
protection against uncommanded deployment of the liftdumper. This AD
requires modification of the electrical connections in a certain relay
panel. The actions are required to be accomplished in accordance with
either of the service bulletins described previously.
There currently are no Fokker Model F28 Mark 0100 series airplanes
affected by this AD on the U.S. Register. All airplanes included in the
applicability of this rule currently are operated by non-U.S. operators
under foreign registry; therefore, they are not directly affected by
this AD action. However, the FAA considers that this rule is necessary
to ensure that the unsafe condition is addressed in the event that any
of these subject airplanes are imported and placed on the U.S. Register
in the future.
Should an affected airplane be imported and placed on the U.S.
Register in the future, it would require approximately 7 work hours to
accomplish the required actions, at an average labor charge of $55 per
work hour. Required parts would cost approximately $80 per airplane.
Based on these figures, the total cost impact of this AD would be $465
per airplane.
Since this AD action does not affect any airplane that is currently
on the U.S. register, it has no adverse economic impact and imposes no
additional burden on any person. Therefore, notice and public
procedures hereon are unnecessary and the amendment may be made
effective in less than 30 days after publication in the Federal
Register.
Comments Invited
Although this action is in the form of a final rule and was not
preceded by notice and opportunity for public comment, comments are
invited on this rule. Interested persons are invited to comment on this
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 under the caption
ADDRESSES. All communications received on or before the closing date
for comments will be considered, and this rule may be amended in light
of the comments received. Factual information that supports the
commenter's ideas and suggestions is extremely helpful in evaluating
the effectiveness of the AD action and determining whether additional
rulemaking action would be needed.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the rule that might
suggest a need to modify the 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 that
summarizes each FAA-public contact concerned with the substance of this
AD 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-47-AD.'' The postcard will be date stamped and
returned to the commenter.
The regulations adopted herein will 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 final
rule does not have sufficient federalism implications to warrant the
preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under 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
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends 14 CFR part
39 of the Federal Aviation Regulations 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:
94-13-05 Fokker: Amendment 39-8945. Docket 94-NM-47-AD.
Applicability: Model F28 Mark 0100 series airplanes having
serial numbers 11244 through 11275 inclusive, 11277, and 11279; that
have been modified in accordance with Fokker Service Bulletin
SBF100-21-026; certificated in any category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent reduced protection against uncommanded deployment of
the liftdumper, accomplish the following:
(a) Within 30 days after the effective date of this AD, modify
the electrical connections in the number 2 relay panel in accordance
with either Fokker Service Bulletin SBF100-21-045, Revision 1, dated
November 17, 1993, or Fokker Service Bulletin SBF100-21-056,
Revision 1, dated November 24, 1993.
(b) As of the effective date of this AD, no airplane shall be
modified in accordance with Fokker Service Bulletin SBF100-21-026
unless either Fokker Service Bulletin SBF100-21-045, Revision 1,
dated November 17, 1993, or Fokker Service Bulletin SBF100-21-056,
Revision 1, dated November 24, 1993, is also accomplished.
(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.
(e) The modification shall be done in accordance with the
following Fokker service bulletins, which contain the specified
effective pages:
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Revision level
Service bulletin referenced and date Page No. shown on page Date shown on page
----------------------------------------------------------------------------------------------------------------
SBF100-21-045, Revision 1, November 17, 1 1............. November 17, 1993.
1993. 2-9 Original...... May 5, 1992.
SBF100-21-056, Revision 1, November 24, 1-6, 26, 28 1............. November 24, 1993.
1993.. 7-25, 27, 29, 30-58 Original...... July 30, 1993.
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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 Fokker Aircraft USA, Inc., 1199 North
Fairfax Street, Alexandria, Virginia 22314. Copies may be inspected at
the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington; or at the Office of the Federal Register, 800 North Capitol
Street, NW., suite 700, Washington, DC.
(f) This amendment becomes effective on July 12, 1994.
Issued in Renton, Washington, on June 13, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-14904 Filed 6-24-94; 8:45 am]
BILLING CODE 4910-13-U
