[Federal Register Volume 73, Number 24 (Tuesday, February 5, 2008)]
[Rules and Regulations]
[Pages 6582-6584]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-1821]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28956; Directorate Identifier 2007-CE-068-AD; 
Amendment 39-15360; AD 2008-03-10]
RIN 2120-AA64


Airworthiness Directives; Cessna Aircraft Company Models 525, 
525A, and 525B 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) Models 525, 525A, and 525B airplanes. 
This AD requires you to inspect the lower wing skin structure, forward 
wing spar, lower fuselage skin, fairings, and the external fairing 
frames for corrosion; repair any damage found; apply a corrosion 
inhibitive sealant to the fuselage fairings before reinstalling; and 
disable the cockpit mounted pilot relief tube. This AD results from 
leaking of the cockpit mounted pilot relief tube, which caused 
corrosion of the airplane structure. We are issuing this AD to detect 
and correct any damage from corrosion of the airplane structure. 
Corrosion of the airplane structure could cause structural degradation 
and lead to structural failure of the airplane with consequent loss of 
control.

DATES: This AD becomes effective on March 11, 2008.
    On March 11, 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, Citation Marketing Division, P.O. Box 7706, 
Wichita, Kansas 67277; telephone: 1-800-835-4090; fax: 1-800-517-8500.
    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-2007-28956; 
Directorate Identifier 2007-CE-068-AD.

FOR FURTHER INFORMATION CONTACT: T.N. Baktha, Aerospace Engineer,1801 
Airport Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-
4155; fax: (316) 946-4107.

SUPPLEMENTARY INFORMATION: 

Discussion

    On October 22, 2007, 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 Models 525, 525A, and 525B airplanes. 
This proposal was published in the Federal Register as a notice of 
proposed rulemaking (NPRM) on October 26, 2007 (72 FR 60790). The NPRM 
proposed to require you to inspect the lower wing skin structure, 
forward wing spar, lower fuselage skin, fairings, and the external 
fairing frames for corrosion; repair any damage found; apply a 
corrosion inhibitive sealant to the fuselage fairings before 
reinstalling; and disable the cockpit mounted pilot relief tube.

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 261 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
----------------------------------------------------------------------------------------------------------------
 80 work-hours x $80 per hour = $6,400.......  Not applicable.................          $6,400       $1,670,400
----------------------------------------------------------------------------------------------------------------

    We have no way of determining the number of airplanes that may need 
repair or further inspection based on the results of the inspection, or 
the costs associated with such repair or inspection.
    We estimate the following costs to disable the cockpit mounted 
pilot relief tube:

----------------------------------------------------------------------------------------------------------------
                                                                                 Total cost per    Total cost on
                  Labor cost                              Parts cost                airplane      U.S. operators
----------------------------------------------------------------------------------------------------------------
 .5 work-hour x $80 per hour = $40...........  Not applicable.................             $40          $10,440
----------------------------------------------------------------------------------------------------------------

    Cessna will provide warranty credit to the extent specified in 
Cessna Citation Service Bulletin SB525-53-20, dated April 30, 2007; 
Cessna Citation Service Bulletin SB525A-53-01, dated April 30, 2007; 
Cessna Citation Service Bulletin SB525B-53-01, dated April 30, 2007; 
Cessna Citation Alert Service Letter ASL525-53-04, Revision 2, dated 
August 19, 2007; Cessna Citation Alert Service Letter ASL525A-53-05, 
Revision 2, dated July 25, 2007; and Cessna Citation Alert Service 
Letter ASL525B-53-02, Revision 2, dated July 25, 2007.

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

[[Page 6583]]

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-2007-28956; Directorate Identifier 2007-CE-068-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:

2008-03-10 Cessna Aircraft Company: Amendment 39-15360; Docket No. 
FAA-2007-28956; Directorate Identifier 2007-CE-068-AD.

Effective Date

    (a) This AD becomes effective on March 11, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the following airplane models and serial 
numbers that have a cockpit mounted pilot relief tube installed and 
are certificated in any category:

------------------------------------------------------------------------
                Models                             Serial No.
------------------------------------------------------------------------
 (1) 525.............................  0001 through 0637.
 (2) 525A............................  0001 through 0347.
(3) 525B.............................  0001 through 0152.
------------------------------------------------------------------------

Unsafe Condition

    (d) This AD results from leaking of the pilot relief tube, which 
caused corrosion of the airplane structure. We are issuing this AD 
to detect and correct any damage from corrosion on the airplane 
structure. Corrosion of the airplane structure could cause 
structural degradation and lead to structural failure of the 
airplane with consequent loss of control.

Compliance

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

              Table 1.--Actions, Compliance, and Procedures
------------------------------------------------------------------------
             Actions                   Compliance          Procedures
------------------------------------------------------------------------
 (1) Inspect the lower wing skin  Within the next 90  Follow Cessna
 structure, forward wing spars,    days after March    Citation Alert
 lower fuselage skin, fairings,    11, 2008 (the       Service Letter
 and external fairing frames for   effective date of   ASL525-53-04,
 corrosion.                        this AD).           Revision 2, dated
                                                       August 19, 2007;
                                                       Cessna Citation
                                                       Alert Service
                                                       Letter ASL525A-53-
                                                       05, Revision 2,
                                                       dated July 25,
                                                       2007; or Cessna
                                                       Citation Alert
                                                       Service Letter
                                                       ASL525B-53-02,
                                                       Revision 2, dated
                                                       July 25, 2007.
 (2) If corrosion damage is       Before further      Follow Cessna
 found in the lower wing skin      flight after the    Citation Alert
 structure, forward wing spars,    inspection          Service Letter
 lower fuselage skin, fairings,    required in         ASL525-53-04,
 or external fairing frames        paragraph (e)(1)    Revision 2, dated
 during the inspection required    of this AD.         August 19, 2007;
 in paragraph (e)(1) of this AD,                       Cessna Citation
 repair as specified in the                            Alert Service
 applicable service information.                       Letter ASL525A-53-
 If the corrosion damage cannot                        05, Revision 2,
 be repaired within the limits                         dated July 25,
 specified in the applicable                           2007; or Cessna
 service information, contact                          Citation Alert
 the manufacturer at 1-800-835-                        Service Letter
 4090 for an FAA-approved repair                       ASL525B-53-02,
 scheme and incorporate this                           Revision 2, dated
 repair.                                               July 25, 2007.
 (3) If corrosion on the lower    Before further      Follow Cessna
 wing skin structure, forward      flight after the    Citation Alert
 wing spars, and lower fuselage    repair by           Service Letter
 skin was repaired by blending     blending was done   ASL525-53-04,
 within the limits specified in    as specified in     Revision 2, dated
 the service information, do a     paragraph (e)(2)    August 19, 2007;
 surface eddy current inspection   of this AD.         Cessna Citation
 or a dye-penetrant inspection                         Alert Service
 for cracks.                                           Letter ASL525A-53-
                                                       05, Revision 2,
                                                       dated July 25,
                                                       2007; or Cessna
                                                       Citation Alert
                                                       Service Letter
                                                       ASL525B-53-02,
                                                       Revision 2, dated
                                                       July 25, 2007.
 (4) If cracks are found during   Before further      Contact Cessna
 the surface eddy current          flight after the    Aircraft Company,
 inspection or the dye-penetrant   inspection          Citation Customer
 inspection required in            required in         Support at 1-800-
 paragraph (e)(3) of this AD,      paragraph (e)(3)    835-4090.
 contact the manufacturer for an   of this AD.
 FAA-approved repair scheme and
 incorporate this repair.

[[Page 6584]]

 
 (5) Install the fuselage         Before further      Follow Cessna
 fairings and apply corrosion      flight after the    Citation Alert
 inhibitive sealant.               inspection          Service Letter
                                   required in         ASL525-53-04,
                                   paragraph (e)(1)    Revision 2, dated
                                   of this AD if no    August 19, 2007;
                                   corrosion was       Cessna Citation
                                   found; or before    Alert Service
                                   further flight      Letter ASL525A-53-
                                   after doing the     05, Revision 2,
                                   repairs and         dated July 25,
                                   inspections         2007; or Cessna
                                   required in         Citation Alert
                                   paragraphs          Service Letter
                                   (e)(2), (e)(3),     ASL525B-53-02,
                                   and (e)(4) of       Revision 2, dated
                                   this AD if          July 25, 2007.
                                   corrosion or
                                   cracks were found.
 (6) Determine the type of        Before further      Cessna Citation
 installation of the cockpit       flight after the    Service Bulletin
 mounted pilot relief tube and     inspection          SB525-53-20,
 disable the relief tube.          required in         dated April 30,
                                   paragraph (e)(1)    2007; Cessna
                                   of this AD.         Citation Service
                                                       Bulletin SB525A-
                                                       53-01, dated
                                                       April 30, 2007;
                                                       or Cessna
                                                       Citation Service
                                                       Bulletin SB525B-
                                                       53-01, dated
                                                       April 30, 2007.
------------------------------------------------------------------------

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: T.N. Baktha, Wichita ACO, Aerospace Engineer, 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.

Material Incorporated by Reference

    (g) You must use the service information specified in Table 2 of 
this AD 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, Citation Marketing Division, P.O. 7706, 
Wichita, Kansas 67277; telephone: 1-800-835-4090; fax: 1-800-517-
8500.
    (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.

              Table 2.--Material Incorporated by Reference
------------------------------------------------------------------------
      Service Bulletin No.        Revision               Date
------------------------------------------------------------------------
 Cessna Citation Alert Service            2  August 19, 2007.
 Letter ASL525-53-04.
 Cessna Citation Alert Service            2  July 25, 2007.
 Letter ASL525A-53-05.
 Cessna Citation Alert Service            2  July 25, 2007.
 Letter ASL525B-53-02.
 Cessna Citation Service        ...........  April 30, 2007
 Bulletin SB525A-53-20.
 Cessna Citation Service        ...........  April 30, 2007.
 Bulletin SB525A-53-01.
 Cessna Citation Service        ...........  April 30, 2007.
 Bulletin SB525B-53-01.
------------------------------------------------------------------------


    Issued in Kansas City, Missouri, on January 24, 2008.
John Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E8-1821 Filed 2-4-08; 8:45 am]
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