Airworthiness Directives; Cessna Aircraft Company Model 525A Airplanes

Airworthiness Directives; Cessna Aircraft Company Model 525A Airplanes

[Federal Register: June 17, 2010 (Volume 75, Number 116)]
[Rules and Regulations]
[Page 34354-34357]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17jn10-9]
––––––––––––––––––––––––––––––––––
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0327; Directorate Identifier 2010-CE-012-AD; Amendment 39-16321;
AD 2010-12-01]
RIN 2120-AA64
Airworthiness Directives; Cessna Aircraft Company Model 525A Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT).
ACTION: Final rule.
––––––––––––––––––––––––––––––––––
SUMMARY: We are adopting a new airworthiness directive (AD) to supersede AD 2009-24-13,
which applies to certain Cessna Aircraft Company (Cessna) Model 525A airplanes. AD 2009-24-13
currently requires you to repetitively inspect the thrust attenuator paddle assemblies for loose and
damaged fasteners and for cracks. AD 2009-24-13 also requires you to replace loose or damaged
fasteners and replace cracked thrust attenuator paddles found during any inspection. Since we issued
AD 2009-24-13, Cessna has developed new design thrust attenuator paddles and universal head rivets
as terminating action for the repetitive inspections. Consequently, this AD would retain the
requirements of AD 2009-24-13 until replacement of both thrust attenuator paddles and the eight
countersunk fasteners with new design thrust attenuator paddles and universal head rivets. We are
issuing this AD to detect and correct loose and damaged fasteners and cracks in the thrust attenuator
paddles, which could result in in-flight departure of the thrust attenuator paddles. This failure could
lead to rudder and elevator damage and result in loss of control.
DATES: This AD becomes effective on July 22, 2010.
On July 22, 2010, the Director of the Federal Register approved the incorporation by reference of
Cessna Citation Service Bulletin SB525A-78-02, Revision 1, dated February 5, 2010, listed in this
AD.
As of December 15, 2009 (74 FR 62479, November 30, 2009), the Director of the Federal
Register approved the incorporation by reference of Cessna Citation Alert Service Letter ASL525A-
78-01, Revision 1, dated October 27, 2009, listed in this AD.
ADDRESSES: For service information identified in this AD, contact Cessna Aircraft Company,
Product Support, P.O. Box 7706, Wichita, KS 67277; telephone: (316) 517-6000; fax: (316) 517-
8500; Internet: http://www.cessna.com.
1

Conclusion
We estimate the following costs to do any necessary installation (retained from AD 2009-24-13)
of missing/damaged fasteners that will be required based on the results of the inspection. We have no
way of determining the number of airplanes that may need this replacement:
$11,560
$85
Not Applicable
1 work-hour × $85 per hour = $85
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-2010-0327;
Directorate Identifier 2010-CE-012-AD.
FOR FURTHER INFORMATION CONTACT: T.N. Baktha, Aerospace Engineer, Wichita
Aircraft Certification Office (ACO), 1801 Airport Road, Room 100, Wichita, Kansas 67209;
telephone: (316) 946-4155; fax: (316) 946-4107.
SUPPLEMENTARY INFORMATION:
Discussion
On March 23, 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 certain Cessna Model 525A airplanes. This
proposal was published in the Federal Register as a notice of proposed rulemaking (NPRM) on
March 30, 2010 (75 FR 15629). The NPRM proposed to supersede AD 2009-24-13 with a new AD
that would retain the requirements of AD 2009-24-13 until replacement of both thrust attenuator
paddles and the eight countersunk fasteners with new design thrust attenuator paddles and universal
head rivets.
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.
2
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 136 airplanes in the U.S. registry.
We estimate the following costs to do the inspection (retained from AD 2009-24-13):
Labor cost
Parts cost
Total cost per
airplane
Total cost on U.S.
operators

We estimate the following costs to do any necessary replacement (retained from AD 2009-24-
13) of a cracked thrust attenuator paddle that will be required based on the results of the inspection.
We have no way of determining the number of airplanes that may need this replacement:
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-
0327; Directorate Identifier 2010-CE-012-AD'' in your request.
Regulatory Findings
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.
Authority for This Rulemaking
As determined by the manufacturer, eligible airplanes may qualify for warranty coverage of parts
and labor.
$528,904
$3,889
$3,464
5 work-hours × $85 per hour = $425
Total cost on U.S.
operators
Total cost per
airplane
Parts cost
Labor cost
We estimate the following costs to do the replacement of both thrust attenuator paddles and the
eight countersunk fasteners with new design thrust attenuator paddles and universal head rivets:
$1,455
Labor cost
Parts cost for two fasteners
Total cost per airplane
2 work-hours × $85 per hour = $170
$99.90
$269.90
3
Labor cost
Parts cost (per paddle)
Total cost per airplane
3 work-hours × $85 per hour = $255
$1,200

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.
§ 39.13 [Amended]
2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2009-24-13, Amendment
39-16105 (74 FR 62479, November 30, 2009), and adding the following new AD:
4

(b) This AD supersedes AD 2009-24-13, Amendment 39-16105.
Follow Cessna Citation Alert
Service Letter ASL525A–
78–01, Revision 1, dated
October 27, 2009.
Within the next 60 days after
December 15, 2009 (the effective
date retained from AD 2009–24–
13) or within the next 30 hours
time-in-service (TIS) after
December 15, 2009 (the effective
date retained from AD 2009–24–
13), whichever occurs first.
Repetitively thereafter inspect at
intervals not to exceed 150 hours
TIS.
(1) Visually inspect the left and
right thrust attenuator paddle
assemblies to determine if there
are any missing, loose, or
damaged fasteners and to
determine if there are any cracks
in the paddle.
Procedures
Compliance
Actions
(f) To address this problem, you must do the following, unless already done:
Compliance
AIRWORTHINESS DIRECTIVE
FAA
Aviation Safety
www.faa.gov/aircraft/safety/alerts/
www.gpoaccess.gov/fr/advanced.html
2010-12-01 Cessna Aircraft Company: Amendment 39-16321; Docket No. FAA-2010-0327;
Directorate Identifier 2010-CE-012-AD.
Effective Date
(a) This AD becomes effective on July 22, 2010.
Affected ADs
5
Applicability
(c) This AD applies to Model 525A airplanes, serial numbers 0001 through 0244, that are
certificated in any category.
Subject
(d) Air Transport Association of America (ATA) Code 72: Engine.
Unsafe Condition
(e) This AD results from reports of fatigue cracks found in thrust attenuator paddles on Cessna
Model 525A airplanes. We are issuing this AD to detect and correct loose and damaged fasteners and
cracks in the thrust attenuator paddles, which could result in in-flight departure of the thrust
attenuator paddles. This failure could lead to rudder and elevator damage and result in loss of control.

Before further flight after the
inspection required in paragraph
(f)(1) of this AD. Continue with
the repetitive inspections
specified in paragraph (f)(1) of
this AD.
(g) The replacement required in paragraph (f)(5) of this AD terminates the repetitive inspection
requirement of this AD. This replacement may be done at anytime, but must be done no later than
300 hours TIS after July 22, 2010 (the effective date of this AD), or within 1 year after July 22, 2010
(the effective date of this AD), whichever occurs first.
(h) If, before July 22, 2010 (the effective date of this AD), you have done all the actions in the
original issue of Cessna Citation Service Bulletin SB525A-78-02, dated November 13, 2009, then no
Follow Cessna Citation
Service Bulletin SB525A–
78–02, Revision 1, dated
February 5, 2010.
Within the next 300 hours TIS
after July 22, 2010 (the effective
date of this AD), or within 1 year
after July 22, 2010 (the effective
date of this AD), whichever
occurs first.
(5) Replace both thrust attenuator
paddles
(ii) If the conditions of paragraph
3.A.(2) of Cessna Citation Alert
Service Letter ASL525A–78–01,
Revision 1, dated October 27,
2009, are met, replace within the
next 150 hours TIS after the
inspection required in paragraph
(f)(3) of this AD. After the
replacement, continue with the
repetitive inspections specified in
paragraph (f)(1) of this AD.
Follow Cessna Citation Alert
Service Letter ASL525A–
78–01, Revision 1, dated
October 27, 2009.
(i) If the conditions of paragraph
3.A.(1) of Cessna Citation Alert
Service Letter ASL525A–78–01,
Revision 1, dated October 27,
2009, are met, replace before
further flight after the inspection
required in paragraph (f)(3) of
this AD. After the replacement,
continue with the repetitive
inspections specified in paragraph
(f)(1) of this AD.
(4) If the cracks identified in
paragraph (f)(3) of this AD meet
or exceed the limits specified in
paragraph 3 of Cessna Citation
Alert Service Letter ASL525A–
78–01, Revision 1, dated October
27, 2009, replace the thrust
attenuator paddle and attachment
hardware, as applicable.
Follow Cessna Citation Alert
Service Letter ASL525A–
78–01, Revision 1, dated
October 27, 2009.
Before further flight after the
inspection required in paragraph
(f)(1) of this AD in which cracks
are found.
(3) If cracks are found during any
inspection required in paragraph
(f)(1) of this AD, do a surface
eddy current inspection of the
thrust attenuator paddles and the
fastener hole(s) to determine the
length of the cracks(s).
(2) If you do not find any cracks
in the thrust attenuator paddles
during any inspection required in
paragraph (f)(1) of this AD, install
any missing fasteners, and replace
any loose or damaged fasteners.
6
Follow Cessna Citation Alert
Service Letter ASL525A–
78–01, Revision 1, dated
October 27, 2009.

Alternative Methods of Compliance (AMOCs)
(i) The Manager, Wichita 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: T.N. Baktha, Aerospace Engineer, Wichita ACO, 1801 Airport Road, Room 100, Wichita,
Kansas 67209; telephone: (316) 946-4155; fax: (316) 946-4107. 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.
(j) AMOCs approved for AD 2009-24-13 are approved for this AD.
Material Incorporated by Reference
(l) You must use Cessna Citation Alert Service Letter ASL525A-78-01, Revision 1, dated
October 27, 2009, and Cessna Citation Service Bulletin SB525A-78-02, Revision 1, dated February
5, 2010, 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 Cessna
Citation Service Bulletin SB525A-78-02, Revision 1, dated February 5, 2010, under 5 U.S.C. 552(a)
and 1 CFR part 51.
(2) On December 15, 2009 (74 FR 62479, November 30, 2009), the Director of the Federal
Register approved the incorporation by reference of Cessna Citation Alert Service Letter ASL525A-
78-01, Revision 1, dated October 27, 2009.
(3) For service information identified in this AD, contact Cessna Aircraft Company, Product
Support, P.O. Box 7706, Wichita, KS 67277; telephone: (316) 517-6000; fax: (316) 517-8500;
Internet: http://www.cessna.com.
(4) 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.
(5) 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 May 26, 2010.
Steven W. Thompson,
Acting Manager, Small Airplane Directorate,
Aircraft Certification Service.
7
further action is required by this AD. This is considered ''unless already done'' credit for this AD
action.

Dan Weiler
Executive Director of the Cessna Owner Organization
(715) 445-5000, ext. 116
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Daniel
Executive Director
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