[Federal Register Volume 75, Number 170 (Thursday, September 2, 2010)]
[Rules and Regulations]
[Pages 53861-53863]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-21741]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0632; Directorate Identifier 2010-CE-025-AD;
Amendment 39-16426; AD 2010-18-01]
RIN 2120-AA64
Airworthiness Directives; Robert E. Rust, Jr. Model DeHavilland
DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for all
Robert E. Rust, Jr. Models DeHavilland DH.C1 Chipmunk 21, DH.C1
Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This AD requires you to
do a one-time inspection of the flap operating system for an unapproved
latch plate design installation, with replacement as necessary. This AD
results from a report of a latch plate failing in service that was not
made in accordance with the applicable de Havilland drawing. We are
issuing this AD to detect and correct an unauthorized latch plate
design installation which could result in an un-commanded retraction of
the flaps. This failure could lead to a stall during a landing
approach.
[[Page 53862]]
DATES: This AD becomes effective on October 7, 2010.
On October 7, 2010, the Director of the Federal Register approved
the incorporation by reference of certain publications listed in this
AD.
ADDRESSES: For service information identified in this AD, contact de
Havilland Support Limited, Duxford Airfield, Cambridgeshire, CB22 4QR,
England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085; e-mail:
[email protected]; Internet: http://www.dhsupport.com/.
To view the AD docket, go to U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue, SE., Washington, DC 20590, or on the Internet at
http://www.regulations.gov. The docket number is FAA-2010-0632;
Directorate Identifier 2010-CE-025-AD.
FOR FURTHER INFORMATION CONTACT: Carey O'Kelley, Aerospace Engineer,
FAA, Atlanta Aircraft Certification Office (ACO), 1701 Columbia Avenue,
College Park, Georgia 30337; telephone: (404) 474-5543; fax: (404) 474-
5606.
SUPPLEMENTARY INFORMATION:
Discussion
On June 14, 2010, we issued a proposal to amend part 39 of the
Federal Aviation Regulations (14 CFR part 39) to include an AD that
would apply to all Robert E. Rust, Jr. Models DeHavilland DH.C1
Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This
proposal was published in the Federal Register as a notice of proposed
rulemaking (NPRM) on June 21, 2010 (75 FR 34956). The NPRM proposed to
require a one-time inspection of the flap operating system for an
unapproved latch plate design installation with replacement as
necessary.
Comments
We provided the public the opportunity to participate in developing
this AD. We received no comments on the proposal or on the
determination of the cost to the public.
Conclusion
We have carefully reviewed the available data and determined that
air safety and the public interest require adopting the AD as proposed
except for minor editorial corrections. We have determined that these
minor corrections:
Are consistent with the intent that was proposed in the
NPRM for correcting the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
Costs of Compliance
We estimate that this AD affects 64 airplanes in the U.S. registry.
We estimate the following costs to do the inspection:
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Total cost
Labor cost Parts cost Total cost on U.S.
per airplane operators
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3 work-hours x $85 per hour = $255.............. Not Applicable.................... $255 $16,320
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We estimate the following costs to do any necessary replacements
that would be required based on the results of the inspection. We have
no way of determining the number of airplanes that may need this
replacement:
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Total cost
Labor cost Parts cost per airplane
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.5 work-hour x $85 per hour = $42.50........ $175 $217.50
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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 AD.
Regulatory Findings
We have determined that this AD will not have federalism
implications under Executive Order 13132. This AD 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.
For the reasons discussed above, I certify that this AD:
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. 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.
We prepared a summary of the costs to comply with this AD (and
other information as included in the Regulatory Evaluation) and placed
it in the AD Docket. You may get a copy of this summary by sending a
request to us at the address listed under ADDRESSES. Include ``Docket
No. FAA-2010-0632; Directorate Identifier 2010-CE-025-AD'' in your
request.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
Accordingly, under 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
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
[[Page 53863]]
Sec. 39.13 [Amended]
0
2. FAA amends Sec. 39.13 by adding the following new AD:
2010-18-01 Robert E. Rust, Jr.: Amendment 39-16426; Docket No. FAA-
2010-0632; Directorate Identifier 2010-CE-025-AD.
Effective Date
(a) This AD becomes effective on October 7, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Models DeHavilland DH.C1 Chipmunk 21,
DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes, all serial
numbers, that are certificated in any category.
Note: These airplanes are also identified as CHIPMUNK 22A,
CHIPMUNK DHC-1T10, CHIPMUNK T.10 MK-22, DH.C1 MK22A, DHC-1, DHC-1
CHIPMUNK, DHC-1 CHIPMUNK 22, DHC-1 SERIES 22, or DHC-1 T.MK. 10.
Subject
(d) Air Transport Association of America (ATA) Code 27: Flight
Controls.
Unsafe Condition
(e) This AD results from a report of a latch plate supplied
under part number (P/N) C1-CF-1489 failing in service. The part in
question was not manufactured to the applicable de Havilland
drawing. The unapproved latch plate was made of a shaft that was
pressed into a plate, rather than being machined from bar material
as one piece. The shaft and plate on the unapproved part can become
separated or bent, resulting in rapid wear and failure of the part.
This condition, if not corrected, could result in an un-commanded
retraction of the flaps. This failure could lead to a stall during a
landing approach.
Compliance
(f) To address this problem, you must do the following, unless
already done:
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Actions Compliance Procedures
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(1) Inspect the flap operating Within 50 hours time-in-service Follow de Havilland Support Limited
system to identify the P/N of the (TIS) after October 7, 2010 (the Technical News Sheet (TNS) CT(C1)
latch plate installed. If latch effective date of this AD) or No 208 Issue 1, dated January 30,
plate P/N C1-CF-1489 is installed, within 90 days after October 7, 2009.
inspect the latch plate to 2010 (the effective date of this
determine if it is in compliance AD), whichever occurs first.
with the design standard. An
unapproved latch plate P/N C1-CF-
1489 is made from two pieces
pressed together while one that
complies with the design standard
is machined in one piece from bar
material.
(2) If during the inspection Before further flight after the Follow de Havilland Support Limited
required in paragraph (f)(1) of inspection where the unapproved TNS CT(C1) No 208 Issue 1, dated
this AD an unapproved latch plate P/ latch plate P/N C1-CF-1849 was January 30, 2009.
N C1-CF-1489 is found, replace the found.
latch plate with a latch plate that
complies with the design standard.
The following U.S. standard
hardware may be substituted for the
hardware specified in the service
information:
(i) 1/16'' diameter cotter pin that
is P/N MS24665-153 (or equivalent)
in place of split pin P/N SP90/C;
and
(ii) Washer that is P/N MS15795-806B
(or equivalent) in place of washer
P/N SP13/B.
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Alternative Methods of Compliance (AMOCs)
(g) The Manager, Atlanta Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. Send information to
ATTN: Carey O'Kelley, Aerospace Engineer, FAA, Atlanta ACO, 1701
Columbia Avenue, College Park, Georgia 30337; telephone: (404) 474-
5543; fax: (404) 474-5606. Before using any approved AMOC on any
airplane to which the AMOC applies, notify your appropriate
principal inspector (PI) in the FAA Flight Standards District Office
(FSDO), or lacking a PI, your local FSDO.
Material Incorporated by Reference
(h) You must use de Havilland Support Limited TNS CT(C1) No 208
Issue 1, dated January 30, 2009, to do the actions required by this
AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact de
Havilland Support Limited, Duxford Airfield, Cambridgeshire, CB22
4QR, England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085;
e-mail: [email protected]; Internet: http://www.dhsupport.com/.
(3) You may review copies of the service information
incorporated by reference for this AD at the FAA, Central Region,
Office of the Regional Counsel, 901 Locust, Kansas City, Missouri
64106. For information on the availability of this material at the
Central Region, call (816) 329-3768.
(4) You may also review copies of the service information
incorporated by reference for this AD 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.
Issued in Kansas City, Missouri, on August 25, 2010.
John R. Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-21741 Filed 9-1-10; 8:45 am]
BILLING CODE 4910-13-P