[Federal Register: July 13, 2004 (Volume 69, Number 133)]
[Rules and Regulations]
[Page 41928-41930]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr13jy04-8]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2002-NM-339-AD; Amendment 39-13727; AD 2004-14-18]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model DHC-8-102, -103, and -
106 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 Bombardier Model DHC-8-102, -103, and -106
airplanes, that requires repetitive detailed inspections of the left
and right aileron tab actuator arm channels for cracking, and
corrective actions if necessary. This proposal also provides an
optional terminating action for the repetitive inspections. This action
is necessary to prevent increased roll forces due to cracking of the
left and right aileron tab actuator arms, which could be interpreted by
the pilot as a flight control problem and might lead to loss of control
of the airplane. This action is intended to address the identified
unsafe condition.
DATES: Effective August 17, 2004.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of August 17, 2004.
ADDRESSES: The service information referenced in this AD may be
obtained from Bombardier, Inc., Bombardier Regional Aircraft Division,
123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. 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 New York Aircraft Certification
Office, 1600 Stewart Avenue, suite 410, Westbury, New York; 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: Richard Beckwith, Aerospace Engineer,
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft
Certification Office (ACO), 1600 Stewart
[[Page 41929]]
Ave., Westbury, NY 11590; telephone (516) 228-7306; fax (516) 794-5531.
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 Bombardier Model DHC-8-
102, -103, and -106 airplanes was published in the Federal Register on
May 5, 2004 (69 FR 25041). That action proposed repetitive detailed
inspections of the left and right aileron tab actuator arm channels for
cracking, and corrective actions if necessary. That action also
proposed an optional terminating action for the repetitive inspections.
Comments
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments have been submitted on the
proposed AD or on the determination of the cost to the public.
Conclusion
After careful review of the available data, the FAA has determined
that air safety and the public interest require the adoption of the
rule as proposed.
Cost Impact
We estimate that 30 airplanes of U.S. registry will be affected by
this AD, that it will take approximately 1 work hour per airplane to
accomplish each required repetitive inspection, and that the average
labor rate is $65 per work hour. Based on these figures, the cost
impact of the AD on U.S. operators is estimated to be $1,950, or $65
per airplane, per inspection.
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 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:
2004-14-18 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment
39-13727. Docket 2002-NM-339-AD.
Applicability: Model DHC-8-102, -103, and -106 airplanes; serial
numbers 3 through 119 inclusive; without Bombardier Modification 8/
0864 incorporated; certificated in any category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent increased roll forces due to cracking of the left and
right aileron tab actuator arm channels, which could be interpreted
by the pilot as a flight control problem and might lead to loss of
control of the airplane, accomplish the following:
Inspection and Corrective Actions
(a) Within 500 flight hours after the effective date of this AD,
perform a detailed inspection of the left and right aileron tab
actuator arm channels for cracking, in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 8-57-07,
Revision ``F,'' dated March 27, 2002.
Note 1: For the purposes of this AD, a detailed inspection is
defined as: ``An intensive visual examination of a specific
structural area, system, installation, or assembly to detect damage,
failure, or irregularity. Available lighting is normally
supplemented with a direct source of good lighting at intensity
deemed appropriate by the inspector. Inspection aids such as mirror,
magnifying lenses, etc., may be used. Surface cleaning and elaborate
access procedures may be required.''
(1) If no cracked actuator arm channel is found, repeat the
inspection at intervals not to exceed 500 flight hours, until
paragraph (a)(2) or (b) of this AD has been accomplished.
(2) If any cracked actuator arm channel is found, prior to
further flight, accomplish paragraph (a)(2)(i) or (a)(2)(ii) of this
AD. Accomplishment of paragraph (a)(2)(i) or (a)(2)(ii) terminates
the repetitive inspections required by paragraph (a)(1) of this AD
for the repaired or replaced aileron tab only.
(i) Replace the actuator arm channel with a new actuator arm
channel; install a reinforcing angle on the new actuator arm
channel; and replace the balance weight arm with a new balance
weight arm; in accordance with Part A of the Accomplishment
Instructions of the service bulletin.
(ii) Replace the aileron tab with a new, improved aileron tab in
accordance with Part C of the Accomplishment Instructions of the
service bulletin.
Optional Terminating Action
(b) Reinforcement of both actuator arm channels with reinforcing
angles and installation of new balance weight arms in accordance
with Part B of the Accomplishment Instructions of Bombardier Service
Bulletin 8-57-07, Revision ``F,'' dated March 27, 2002; or
replacement of the aileron tabs with new, improved tabs in
accordance with Part C of the Accomplishment Instructions of that
service bulletin; constitutes terminating action for the repetitive
inspections required by paragraph (a)(1) of this AD.
Part Installation
(c) As of the effective date of this AD, no person may install
any actuator arm channel or any aileron tab on any airplane except
in accordance with paragraph (a)(2) or (b) of this AD.
Alternative Methods of Compliance
(d) In accordance with 14 CFR 39.19, the Manager, New York
Aircraft Certification Office (ACO), FAA, is authorized to approve
alternative methods of compliance for this AD.
Incorporation by Reference
(e) The actions shall be done in accordance with Bombardier
Service Bulletin 8-57-07, Revision ``F,'' dated March 27, 2002. 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 Bombardier, Inc., Bombardier
Regional Aircraft Division, 123 Garratt Boulevard, Downsview,
Ontario M3K 1Y5, Canada. This information may be examined at the
Federal
[[Page 41930]]
Aviation Administration (FAA), Transport Airplane Directorate, Rules
Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the New
York Aircraft Certification Office, 1600 Stewart Avenue, suite 410,
Westbury, New York; 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 2: The subject of this AD is addressed in Canadian
airworthiness directive CF-2002-29, dated May 22, 2002.
Effective Date
(f) This amendment becomes effective on August 17, 2004.
Issued in Renton, Washington, on June 30, 2004.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-15513 Filed 7-12-04; 8:45 am]
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