Airworthiness Directives; CFM International CFM56-5 and -5B Series Turbofan Engines

[Federal Register Volume 72, Number 28 (Monday, February 12, 2007)]
[Rules and Regulations]
[Pages 6457-6459]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-2068]



[[Page 6457]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-27112; Directorate Identifier 2001-NE-49-AD; 
Amendment 39-14926; AD 2007-03-15]
RIN 2120-AA64


Airworthiness Directives; CFM International CFM56-5 and -5B 
Series Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is superseding an existing airworthiness directive 
(AD) for CFM International CFM56-5 and -5B series turbofan engines. 
That AD requires exhaust gas temperature (EGT) harness replacement or 
the establishment of an EGT baseline and trend monitoring. That AD also 
requires replacement, if necessary, of certain EGT harnesses and EGT 
couplings as soon as a slow and continuous EGT drift downward is 
noticed after the effective date of that AD. This AD requires the same 
actions but for an increased population of affected EGT harnesses. This 
AD results from CFM International adding subsequently certified engine 
models to the list of engines that could have affected harnesses 
installed. We are issuing this AD to prevent unexpected deterioration 
of critical rotating engine parts due to higher than desired engine 
operating EGTs.

DATES: This AD becomes effective March 19, 2007. The Director of the 
Federal Register approved the incorporation by reference of certain 
publications listed in the regulations as of March 19, 2007.

ADDRESSES: You can get the service information identified in this AD 
from CFM International, Technical Publications Department, 1 Neumann 
Way, Cincinnati, OH 45215; telephone (513) 552-2800; fax (513) 552-
2816.
    You may examine the AD docket on the Internet at http://dms.dot.gov 
or in Room PL-401 on the plaza level of the Nassif Building, 400 
Seventh Street, SW., Washington, DC.

FOR FURTHER INFORMATION CONTACT: James Rosa, Aerospace Engineer, Engine 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; telephone (781) 238-7152; 
fax (781) 238-7199; e-mail: [email protected].

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 
with a proposed AD. The proposed AD applies to CFM International CFM56-
5 and -5B series turbofan engines. We published the proposed AD in the 
Federal Register on June 16, 2006 (71 FR 34852). That action proposed 
to require, for an increased population of affected EGT harnesses:
    <bullet> EGT harness replacement or the establishment of an EGT 
baseline and trend monitoring; and
    <bullet> Replacement, if necessary, of certain EGT harnesses and 
EGT couplings as soon as a slow and continuous EGT drift downward is 
noticed after the effective date of that AD.

Examining the AD Docket

    You may examine the docket that contains the AD, any comments 
received, and any final disposition in person at the Docket Management 
Facility Docket Office between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays. The Docket Office (telephone (800) 
647-5227) is located on the plaza level of the Department of 
Transportation Nassif Building at the street address stated in 
ADDRESSES. Comments will be available in the AD docket shortly after 
the DMS receives them.

Comments

    We provided the public the opportunity to participate in the 
development of 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.

Docket Number Change

    We are transferring the docket for this AD to the Docket Management 
System as part of our on-going docket management consolidation efforts. 
The new Docket No. is FAA-2007-27112. The old Docket No. became the 
Directorate Identifier, which is 2001-NE-49-AD. This AD might get 
logged into the DMS docket, ahead of the previously collected documents 
from the old docket file, as we are in the process of sending those 
items to the DMS.

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 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 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 
placed it in the AD Docket. You may get a copy of this summary at the 
address listed under ADDRESSES.

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 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 removing Amendment 39-13020 (68 FR 
3171, January 23, 2003) and by adding a new airworthiness directive,

[[Page 6458]]

Amendment 39-14926, to read as follows:

2007-03-15 CFM International: Amendment 39-14926; Docket No. FAA-
2007-27112; Directorate Identifier 2001-NE-49-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective March 
19, 2007.

Affected ADs

    (b) This AD supersedes AD 2003-02-04, Amendment 39-13020.

Applicability

    (c) This AD applies to CFM International CFM56-5 and -5B series 
turbofan engines:
    (1) With an exhaust gas temperature (EGT) upper harness part 
number (P/N) CA170-00, with a serial number (SN):
    (i) Listed in Table 1, Table 4, or Table 5 of CFM56 Service 
Bulletin (SB) No. CFM56-5B S/B 77-0008, Revision 3, dated April 4, 
2005, or
    (ii) Listed in Table 1 or Table 4 of CFM56 SB No. CFM56-5 S/B 
77-0020, Revision 3, dated April 4, 2005.
    (2) With an EGT lower harness P/N CA171-00, with a SN:
    (i) Listed in Table 2, Table 4, or Table 5 of CFM56 SB No. 
CFM56-5B S/B 77-0008, Revision 3, dated April 4, 2005; or
    (ii) Listed in Table 2 or Table 4 of CFM56 SB No. CFM56-5 S/B 
77-0020, Revision 3, dated April 4, 2005.
    (3) With an EGT coupling P/N CA172-02 with a SN:
    (i) Listed in Table 3, Table 4, or Table 5 of CFM56 Service 
Bulletin (SB) No. CFM56-5B S/B 77-0008, Revision 3, dated April 4, 
2005, or
    (ii) Listed in Table 3 or Table 4 of CFM56 SB No. CFM56-5 S/B 
77-0020, Revision 3, dated April 4, 2005.
    (4) These engines are installed on, but not limited to Airbus 
Industrie A318, A319, A320, and A321 airplanes.

Unsafe Condition

    (d) This AD results from CFM International adding subsequently 
certified engine models, CFM56-5B3/P1, CFM56-5B3/2P1, CFM56-5B4/P1, 
and CFM56-5B4/2P1, to the list of engines that could have affected 
harnesses installed, and increasing the population of affected EGT 
harnesses. We are issuing this AD to prevent unexpected 
deterioration of critical rotating engine parts due to higher than 
desired engine operating EGTs.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified unless the 
actions have already been done.
    (f) If an EGT harness or EGT coupling has a serial number that 
is followed by the letter ``W'', no further action is required for 
that part.
    (g) For affected EGT harnesses and EGT couplings identified 
using paragraph (c) of this AD, with fewer than 3,000 engine flight 
hours-since-installation, do the following:
    (1) Replace affected EGT harnesses and EGT couplings, not being 
trend monitored, with serviceable parts within 500 flight hours 
after the effective date of this AD; or
    (2) After the effective date of this AD:
    (i) Review the smooth data EGT trend via the System for Analysis 
of Gas Turbine Engines (SAGE), or equivalent, since the affected 
components were first installed on the current engine.
    (ii) Continue this trend monitoring for the affected EGT 
harnesses and EGT couplings to ensure that the system does not show 
a minimum of 30 [deg]C downward (i.e. cooler) indication, or more, 
without a corresponding change in other associated engine parameters 
such as N1 (LPT rotor speed), N2 (HPT rotor speed), and fuel flow.
    (iii) Provided that there is sufficient, actual EGT margin to do 
so, replace the EGT harnesses and EGT couplings within 100 flight 
hours after they have been determined to be defective.
    (iv) Continue to monitor the EGT indications for 3,000 engine 
flight hours since the first installation on the current engine.

Terminating Action

    (h) Any of the following three conditions is terminating action 
for the trend monitoring requirements specified in paragraphs 
(g)(2)(i) through (g)(2)(iv) of this AD:
    (1) Replacing an EGT harness and EGT coupling with a serviceable 
part, or
    (2) Replacing an EGT harness and EGT coupling with an EGT 
harness and EGT coupling that has a letter ``W'' following the SN, 
or
    (3) Accumulating 3,000 engine flight hours on an EGT harness and 
EGT coupling.

Alternative Methods of Compliance

    (i) The Manager, Engine Certification Office, has the authority 
to approve alternative methods of compliance for this AD if 
requested using the procedures found in 14 CFR 39.19.

Related Information

    (j) Airworthiness directive No. F-2003-001 R2, dated June 8, 
2005, which is from the Direction Generale de L'Aviation Civile 
airworthiness authority for France, also addresses the subject of 
this AD.
    (k) Contact James Rosa, Aerospace Engineer, Engine Certification 
Office, FAA, Engine and Propeller Directorate, 12 New England 
Executive Park, Burlington, MA 01803; telephone (781) 238-7152; fax 
(781) 238-7199; e-mail: [email protected] for more information 
about this AD.

Material Incorporated by Reference

    (l) You must use the CFM56 Service Bulletin Tables specified in 
the compliance of this AD, to determine applicability to this AD. 
The following Table 1 lists the Service Bulletins. The Director of 
the Federal Register approved the incorporation by reference of the 
documents listed in Table 1 of this AD in accordance with 5 U.S.C. 
552(a) and 1 CFR part 51. Contact CFM International, Technical 
Publications Department, 1 Neumann Way, Cincinnati, OH 45215; 
telephone (513) 552-2800; fax (513) 552-2816, for a copy of this 
service information. You may review copies 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/cfr/ibr-locations.html.

                                      Table 1.--Incorporation by Reference
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           CFM56 Service Bulletin No.                       Page            Revision             Date
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CFM56-5B S/B 77-0008............................  All....................          3  April 4, 2005.
 
    Total Pages: 34
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CFM56-5 S/B 77-0020.............................  All....................          3  April 4, 2005.
 
    Total Pages: 16
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[[Page 6459]]

    Issued in Burlington, Massachusetts, on January 31, 2007.
Peter A. White,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. E7-2068 Filed 2-9-07; 8:45 am]
BILLING CODE 4910-13-P

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