Document ID: FAA-2007-0198-0001
Agency: faa
Document Type: Rule
Title: Airworthiness Directives; Cessna Aircraft Company, Model 525B Airplanes
Posted Date: 2007-11-20T05:00Z

[Federal Register: November 20, 2007 (Volume 72, Number 223)]
[Rules and Regulations]               
[Page 65219-65221]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr20no07-3]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-0198; Directorate Identifier 2007-CE-085-AD; 
Amendment 39-15262; AD 2007-23-16]
RIN 2120-AA64

 
Airworthiness Directives; Cessna Aircraft Company, Model 525B 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Cessna Aircraft Company (Cessna) Model 525B airplanes. This AD 
requires you to incorporate electrical power relay circuit protection 
kit part number (P/N) SB525B-24-02. This AD results from both the need 
to protect aircraft wiring left unprotected in the original design and 
a report of a Model 525B airplane experiencing in-flight loss of 
numerous systems, tripped circuit breakers, and burned wiring adjacent 
to the power distribution panel. We are issuing this AD to correct an 
incorrect wiring installation and to provide short-circuit protection 
for all wiring from the aircraft power distribution system. This 
condition could result in burned wiring

[[Page 65220]]

and loss of various aircraft electrical systems.

DATES: This AD becomes effective on December 19, 2007.
    On December 19, 2007, the Director of the Federal Register approved 
the incorporation by reference of certain publications listed in this 
AD.
    We must receive any comments on this AD by January 22, 2008.

ADDRESSES: Use one of the following addresses to comment on this AD.
     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: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    To get the service information identified in this AD, contact The 
Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, 
Kansas 67277-7706; telephone: (316) 517-5800; fax: (316) 942-9006.
    To view the comments to this AD, go to http://www.regulations.gov. 

The docket number is FAA-2007-0198; Directorate Identifier 2007-CE-085-
AD.

FOR FURTHER INFORMATION CONTACT: Raymond N. Johnston, Aerospace 
Engineer, 1801 Airport Road, Room 100, Wichita, Kansas 67209; 
telephone: (316) 946-4197; fax: (316) 946-4107.

SUPPLEMENTARY INFORMATION:

Discussion

    Cessna issued Service Bulletin SB525B-24-02, dated January 10, 
2007, to add fuses to the emergency electrical power relay circuits to 
protect aircraft wiring left unprotected in the original design. Since 
issuance of that service bulletin, the FAA received a report from 
Cessna of a Model 525B airplane experiencing an in-flight direct short 
between aircraft direct current (DC) power and ground with loss of 
numerous systems, tripped circuit breakers, and burned wiring adjacent 
to the power distribution panel.
    Cessna determined that a wiring alteration done following Cessna 
Citation Service Bulletin SB525B-24-02, dated January 10, 2007, 
contributed to this direct short between aircraft DC power and ground. 
The service bulletin had incorrect alteration instructions, which if 
implemented, could cause a direct short between aircraft DC power and 
ground.
    Failure or opening of power bus limiters in conjunction with 
incorporation of that service bulletin may result in loss of numerous 
systems and burned aircraft wiring. The instructions and wiring 
diagrams call for incorrectly connecting 28V DC to an annunciator panel 
where there should be a ground. Terminal 2 of circuit breaker HZ050 is 
left with no wiring connected. This results in a direct short.
    Cessna revised the service bulletin to include correct alteration 
instructions that would fully address the unsafe condition of 
unprotected wiring in the original design.
    This condition, if not corrected, could result in burned wiring and 
loss of various aircraft electrical systems.

Relevant Service Information

    We reviewed Cessna Citation Service Bulletin SB525B-24-02, Revision 
1, dated October 4, 2007. The service information describes procedures 
for incorporating electrical power relay circuit protection kit P/N 
SB525B-24-02. The manufacturer intends that the actions specified in 
the service information adequately address the unsafe condition.

FAA's Determination and Requirements of this AD

    We are issuing this AD because we evaluated all the information and 
determined the unsafe condition described previously is likely to exist 
or develop on other products of the same type design. This AD requires 
you to incorporate electrical power relay circuit protection kit P/N 
SB525B-24-02.
    In preparing this rule, we contacted type clubs and aircraft 
operators to get technical information and information on operational 
and economic impacts. We did not receive any information through these 
contacts. If received, we would have included a discussion of any 
information that may have influenced this action in the rulemaking 
docket.

FAA's Determination of the Effective Date

    An unsafe condition exists that requires the immediate adoption of 
this AD. The FAA has found that the risk to the flying public justifies 
waiving notice and comment prior to adoption of this rule because this 
condition, if not corrected, could result in burned wiring and loss of 
various aircraft electrical systems. Therefore, we determined that 
notice and opportunity for public comment before issuing this AD are 
impracticable and that good cause exists for making this amendment 
effective in fewer than 30 days.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not precede it by notice and an opportunity for 
public comment. We invite you to send any written relevant data, views, 
or arguments regarding this AD. Send your comments to an address listed 
under the ADDRESSES section. Include the docket number ``FAA-2007-0198; 
Directorate Identifier 2007-CE-085-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the AD. We will consider 
all comments received by the closing date and may amend the AD in light 
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 concerning this AD.

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 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:

[[Page 65221]]

    (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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket that contains the AD, the regulatory 
evaluation, any comments received, and other information 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 Docket Office (telephone (800) 647-5527) 
is located at the street address stated in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 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. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2007-23-16 Cessna Aircraft Company: Amendment 39-15262; Docket No. 
FAA-2007-0198; Directorate Identifier 2007-CE-085-AD.

Effective Date

    (a) This AD becomes effective on December 19, 2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Model 525B, serial numbers 0001 through 
0013 airplanes, that are certificated in any category.

Unsafe Condition

    (d) This AD results from both the need to protect aircraft 
wiring left unprotected in the original design and a report of a 
Model 525B airplane experiencing in-flight loss of numerous systems, 
tripped circuit breakers, and burned wiring adjacent to the power 
distribution panel. We are issuing this AD to correct an incorrect 
wiring installation and to provide short-circuit protection for all 
wiring from the aircraft power distribution system. This condition 
could result in burned wiring and loss of various aircraft 
electrical systems.

Compliance

    (e) To address this problem, you must do the following, unless 
already done:

------------------------------------------------------------------------
           Actions                 Compliance            Procedures
------------------------------------------------------------------------
Incorporate electrical power  At whichever of the   Follow Cessna
 relay circuit protection      following occurs      Citation Service
 kit part number SB525B-24-    first:                Bulletin SB525B-24-
 02                           (1) Within the next    02, Revision 1,
                               30 days after         dated October 4,
                               December 19, 2007     2007.
                               (the effective date
                               of this AD); or.
                              (2) Within the next
                               10 hours time-in-
                               service after
                               December 19, 2007
                               (the effective date
                               of this AD).
------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

    (f) 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: Raymond N. Johnston, Aerospace Engineer, Wichita ACO, 1801 
Airport Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-
4197; 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.

Material Incorporated by Reference

    (g) You must use Cessna Citation Service Bulletin SB525B-24-02, 
Revision 1, dated October 4, 2007, 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 
Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, 
Kansas 67277-7706; telephone: (316) 517-5800; fax: (316) 942-9006.
    (3) You may review copies at the FAA, Central Region, Office of 
the Regional Counsel, 901 Locust, Kansas City, Missouri 64106; 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
.

    Issued in Kansas City, Missouri, on November 7, 2007.
John R. Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E7-22304 Filed 11-19-07; 8:45 am]

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