[Federal Register Volume 76, Number 31 (Tuesday, February 15, 2011)]
[Rules and Regulations]
[Pages 8607-8609]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-2516]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1107; Directorate Identifier 2009-NM-263-AD; 
Amendment 39-16600; AD 2011-03-16]
RIN 2120-AA64


Airworthiness Directives; The Cessna Aircraft Company Model 750 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD requires an inspection to determine the 
serial numbers of the auxiliary power unit (APU) generator and the left 
and right engine direct current (DC) generators, and corrective actions 
if necessary. This AD also requires revising the airplane flight 
manual. This AD was prompted by a report of a DC generator overvoltage 
event which caused smoke in the cockpit and damage to numerous avionics 
and electrical components. We are issuing this AD to detect and correct 
an overvoltage condition on the DC electrical busses caused by exciter 
stator winding failures, and subsequent failure of the generator 
control unit (GCU) overvoltage protection circuitry, which could result 
in damage to critical electrical and avionics components.

DATES: This AD is effective March 22, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of March 22, 
2011.

ADDRESSES: For service information identified in this AD, contact 
Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 67277; telephone 
316-517-6215; fax 316-517-5802; e-mail [email protected]; 
Internet https://www.cessnasupport.com/newlogin.html. You may review 
copies of the referenced service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For 
information on the availability of this material at the FAA, call 425-
227-1221.

Examining the AD Docket

    You may examine the AD docket 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 AD

[[Page 8608]]

docket contains this AD, the regulatory evaluation, any comments 
received, and other information. The address for the Docket Office 
(phone: 800-647-5527) is Document Management Facility, U.S. Department 
of Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Raymond Johnston, Aerospace Engineer, 
Electrical Systems and Avionics, ACE-119W, FAA, Wichita Aircraft 
Certification Office (ACO), 1801 Airport Road, Room 100, Mid-Continent 
Airport, Wichita, Kansas 67209; phone: 316-946-4197; fax: 316-946-4107; 
e-mail: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an airworthiness directive (AD) that would apply to 
the specified products. That NPRM published in the Federal Register on 
November 9, 2010 (75 FR 68731). That NPRM proposed to require an 
inspection to determine the serial numbers of the auxiliary power unit 
(APU) generator and the left and right engine direct current (DC) 
generators, and related corrective actions if necessary. That NPRM also 
proposed to require revising the airplane flight manual.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comments received on the proposal 
and the FAA's response to each comment.

Request To Verify Applicability

    The European Aviation Safety Agency (EASA) requested clarification 
regarding the applicability of the NPRM. The EASA noted that the 
applicability in paragraph (c) of the NPRM applies to Cessna Model 750 
airplanes having serial numbers -0222 and -0225 and subsequent. The 
EASA noted that paragraph (i) of the NPRM states that no person may 
install any Pacific Scientific generators having part number 92841-1 
(9914752-1) that has serial numbers 060 through 297 without suffix 
``C'' on any airplane. The EASA asked if there is a chance that the 
affected generators could be installed on other Model 750 airplanes 
with serial numbers that are not identified in paragraph (c) of the 
NPRM.
    We agree to clarify. Cessna Model 750 airplanes having lower serial 
numbers use only Goodrich generators, which are not affected by the 
identified unsafe condition. We have not changed the final rule in 
regard to this issue.

Request To Change Paragraph Identifier in Note 1 of the NPRM

    Cessna requested that we change the paragraph identifier in Note 1 
of the NPRM to specify paragraph (h), not paragraph (g) of the NPRM, 
because paragraph (h) of the NPRM contained the AFM revisions.
    We agree. We revised this AD as requested.

Request To Remove the Compliance Time

    Cessna requested that we remove the compliance time of ``before 
further flight'' from the Relevant Service Information section and 
paragraph (g) of the NPRM. Cessna did not provide a reason for its 
request.
    We partially agree. We agree that the information in the Relevant 
Service Information and the Cessna service letter should match; 
however, the Relevant Service Information section is not contained in 
the final rule. We do not agree with the request to change the 
compliance time in paragraph (g) of the final rule. By the time this AD 
is issued, there will not be an issue with parts availability and if an 
affected generator is found to be installed, it should be replaced 
immediately. However, operators may request approval of an alternative 
method of compliance (AMOC) in accordance with the procedures specified 
in paragraph (j)(1) of this AD. We have not changed the final rule in 
regard to this issue.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
the AD with the change described previously. We also determined that 
this change will not increase the economic burden on any operator or 
increase the scope of the AD.

Costs of Compliance

    We estimate that this AD affects 67 airplanes of U.S. registry. We 
also estimate that it takes up to 10 work-hours per product to comply 
with this AD. The average labor rate is $85 per work-hour. Based on 
these figures, we estimate the cost of this AD to the U.S. operators to 
be up to $56,950, or $850 per product.

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

    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 DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) 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.

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 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):


[[Page 8609]]


2011-03-16 The Cessna Aircraft Company: Amendment 39-16600; Docket 
No. FAA-2010-1107; Directorate Identifier 2009-NM-263-AD.

Effective Date

    (a) This AD is effective March 22, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to The Cessna Aircraft Company Model 750 
airplanes, certificated in any category, having serial numbers -
0222, and -0225 and subsequent.

Subject

    (d) Air Transport Association (ATA) of America Code 24: 
Electrical power.

Unsafe Condition

    (e) This AD results from a report of a direct current (DC) 
generator overvoltage event which caused smoke in the cockpit and 
damage to numerous avionics and electrical components. The Federal 
Aviation Administration is issuing this AD to detect and correct an 
overvoltage condition on the DC electrical busses caused by exciter 
stator winding failures, and subsequent failure of the generator 
control unit overvoltage protection circuitry, which could result in 
damage to critical electrical and avionics components.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Inspection

    (g) For airplanes having serial numbers -0222, -0225 through -
0293 inclusive, -0295, -0296, and -0298: Within 6 months or 600 
flight hours after the effective date of this AD, whichever occurs 
later, inspect to determine the serial number of the auxiliary power 
unit (APU) generator and the left and right engine 400 amp DC 
generators, in accordance with the Accomplishment Instructions of 
Cessna Service Letter SL750-24-08, dated August 13, 2009. For 
airplanes that have one or more generators having a serial number 
060 through 297 inclusive without suffix ``C,'' before further 
flight, replace the affected generator(s) with a new or serviceable 
generator, in accordance with the Accomplishment Instructions of 
Cessna Service Letter SL750-24-08, dated August 13, 2009.

Revision of the Airplane Flight Manual (AFM)

    (h) For airplanes having serial numbers -0222, and -0225 and 
subsequent: Within 30 days after the effective date of this AD, 
revise Section II, Operating Limitations, Generator Limitations, 
page 2-12, of the applicable airplane flight manual (AFM) to include 
the information in the applicable Cessna temporary change (TC) 
required by paragraph (h)(1), (h)(2), or (h)(3) of this AD. These 
TCs introduce procedures for resetting the APU generator. Operate 
the airplane according to the limitations and procedures in the TCs.
    (1) For Model 750 Citation X airplanes (750-0173 and on and 
airplanes incorporating Cessna Service Bulletin SB750-71-10): Insert 
Cessna TC 75FMA TC-R01-46, dated April 23, 2009.
    (2) For Model 750 Citation X airplanes (750-0173 and on and 
airplanes incorporating Cessna Service Bulletin SB750-71-10): Insert 
Cessna TC 75EUA TC-R01-35, dated May 8, 2009.
    (3) For Model 750 Citation X airplanes (750-0173 and on and 
airplanes incorporating Cessna Service Bulletin SB750-71-10): Insert 
Cessna TC 75EUMA TC-R01-35, dated May 8, 2009.

    Note 1:  The AFM revisions required by paragraph (h) of this AD 
may be done by inserting copies of Cessna TCs 75FMA TC-R01-46, dated 
April 23, 2009; 75EUA TC-R01-35, dated May 8, 2009; or 75EUMA TC-
R01-35, dated May 8, 2009; into the applicable AFM. When these TCs 
have been included in general revisions of the applicable AFM, the 
general revisions may be inserted into the applicable AFM, provided 
the relevant information in the general revision is identical to 
that in the applicable TC.

Parts Installation

    (i) As of the effective date of this AD, no person may install 
any Pacific Scientific generator having part number 92841-1 
(9914752-1) that has serial numbers 060 through 297 without the 
suffix ``C'' on any airplane.

Alternative Methods of Compliance (AMOCs)

    (j)(1) The Manager, Wichita Aircraft Certification Office, 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 Johnston, Aerospace Engineer, Electrical Systems and 
Avionics, ACE-119W, FAA, Wichita Aircraft Certification Office 
(ACO), 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, 
Kansas 67209; telephone (316) 946-4197; fax (316) 946-4107.
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

Related Information

    (k) For more information about this AD, contact Raymond 
Johnston, Aerospace Engineer, Electrical Systems and Avionics, ACE-
119W, FAA, Wichita Aircraft Certification Office (ACO), 1801 Airport 
Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; phone: 
316-946-4197; fax: 316-946-4107; e-mail: [email protected].

Material Incorporated by Reference

    (l) You must use the service information specified in table 1 of 
this AD to do the actions required by this AD, unless the AD 
specifies otherwise.

             Table 1--All Material Incorporated by Reference
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               Document                               Date
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Cessna Temporary Change (TC) 75FMA TC- April 23, 2009.
 R01-46 to the Section II, Operating
 Limitations, Generator Limitations,
 page 2-12.
Cessna TC 75EUA TC-R01-35 to the       May 8, 2009.
 Section II, Operating Limitations,
 Generator Limitations, page 2-12.
Cessna TC 75EUMA TC[dash]R01-35 to     May 8, 2009.
 the Section II, Operating
 Limitations, Generator Limitations,
 page 2-12.
Cessna Service Letter SL750-24-08....  August 13, 2009.
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    (1) The Director of the Federal Register approved the 
incorporation by reference of the service information specified in 
table 1 of this AD under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 67277; telephone 
316-517-6215; fax 316-517-5802; e-mail 
[email protected]; Internet https://www.cessnasupport.com/newlogin.html.
    (3) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at an NARA facility, call 202-741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on January 28, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-2516 Filed 2-14-11; 8:45 am]
BILLING CODE 4910-13-P