[Federal Register Volume 73, Number 113 (Wednesday, June 11, 2008)]
[Rules and Regulations]
[Pages 32987-32988]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-12305]



[[Page 32987]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0306; Directorate Identifier 2008-CE-014-AD; 
Amendment 39-15544; AD 2008-12-01]
RIN 2120-AA64


Airworthiness Directives; Cessna Aircraft Company Model 525 
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 certain 
Cessna Aircraft Company (Cessna) Model 525 airplanes. This AD requires 
you to inspect for missing firewall sealant between the aft firewall 
assembly and seal assembly; and, if you find that firewall sealant is 
missing, seal with firewall sealant between the aft firewall assembly 
and seal assembly. This AD results from a report that firewall sealant 
may not have been applied between the aft firewall assembly and seal 
assembly during manufacture of certain Model 525 airplanes. We are 
issuing this AD to detect and correct missing firewall sealant between 
the aft firewall assembly and seal assembly, which could result in 
failure of the fire extinguishing system to prevent the spread of fire 
through the firewall gap. This failure could lead to an uncontrolled 
fire.

DATES: This AD becomes effective on July 16, 2008.
    On July 16, 2008, 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 
Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, 
Kansas 67277; telephone: (316) 517-5800; fax: (316) 942-9006.
    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-2008-0306; 
Directorate Identifier 2008-CE-014-AD.

FOR FURTHER INFORMATION CONTACT: James Galstad, Aerospace Engineer, 
Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, 
Wichita, Kansas 67209; telephone: (316) 946-4135; fax: (316) 946-4107.

SUPPLEMENTARY INFORMATION:

Discussion

    On March 7, 2008, 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 525 airplanes. This proposal was 
published in the Federal Register as a notice of proposed rulemaking 
(NPRM) on March 13, 2008 (73 FR 13486). The NPRM proposed to require 
you to inspect for missing firewall sealant between the aft firewall 
assembly and seal assembly; and, if you find that firewall sealant is 
missing, seal with firewall sealant between the aft firewall assembly 
and seal assembly.

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 45 airplanes in the U.S. registry.
    We estimate the following costs to do the inspection:

----------------------------------------------------------------------------------------------------------------
                                                                                  Total cost per   Total cost on
                  Labor cost                               Parts cost                airplane     U.S. operators
----------------------------------------------------------------------------------------------------------------
1 work-hour x $80 per hour = $80..............  Not Applicable..................             $80          $3,600
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary repairs 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 repair:

------------------------------------------------------------------------
                                                          Total cost per
               Labor cost                   Parts cost       airplane
------------------------------------------------------------------------
4 work-hours x $80 per hour = $320......             $30            $350
------------------------------------------------------------------------

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

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    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-2008-0306; Directorate Identifier 2008-CE-014-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

0
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

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. FAA amends Sec.  39.13 by adding the following new AD:

2008-12-01 Cessna Aircraft Company: Amendment 39-15544; Docket No. 
FAA-2008-0306; Directorate Identifier 2008-CE-014-AD.

Effective Date

    (a) This AD becomes effective on July 16, 2008.

Applicability

    (c) This AD applies to Model 525 airplanes, serial numbers 525-
0600 through 525-0662, that are certificated in any category.

Affected ADs

    (b) None.

Unsafe Condition

    (d) This AD results from a report that firewall sealant may not 
have been applied between the aft firewall assembly and seal 
assembly during manufacture of certain Model 525 airplanes. We are 
issuing this AD to detect and correct missing firewall sealant 
between the aft firewall assembly and seal assembly, which could 
result in failure of the fire extinguishing system to prevent the 
spread of fire through the firewall gap. This failure could lead to 
an uncontrolled fire.

Compliance

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

------------------------------------------------------------------------
           Actions                 Compliance            Procedures
------------------------------------------------------------------------
(1) Inspect between the       Within the next 60    Follow Cessna
 6352225 aft firewall          hours time-in-        Aircraft Company
 assembly and 6352226 seal     service (TIS) after   Citation Service
 assembly for missing          July 16, 2008 (the    Letter SL525-71-05,
 firewall sealant.             effective date of     Revision 1, dated
                               this AD) or within    February 6, 2008.
                               60 days after July
                               16, 2008 (the
                               effective date of
                               this AD), whichever
                               occurs first.
(2) If, as a result of the    Before further        Follow Cessna
 inspection required by        flight after the      Aircraft Company
 paragraph (e)(1) of this      inspection required   Citation Service
 AD, you find there is         by paragraph (e)(1)   Letter SL525-71-05,
 missing firewall sealant      of this AD.           Revision 1, dated
 between the 6352225 aft                             February 6, 2008.
 firewall assembly and
 6352226 seal assembly, seal
 with U000117S firewall
 sealant in the gap between
 the 6352225 aft firewall
 assembly and 6352226 seal
 assembly.
------------------------------------------------------------------------

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: James Galstad, Aerospace Engineer, Wichita ACO, 1801 Airport 
Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-4135; 
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 Aircraft Company Citation Service Letter 
SL525-71-05, Revision 1, dated February 6, 2008, 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; 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 May 27, 2008.
David R. Showers,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E8-12305 Filed 6-10-08; 8:45 am]
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