Airworthiness Directives; CFM International S.A. Turbofan Engines

[Federal Register Volume 80, Number 201 (Monday, October 19, 2015)]
[Rules and Regulations]
[Pages 63083-63084]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2015-26345]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-0277; Directorate Identifier 2015-NE-05-AD; 
Amendment 39-18262; AD 2015-18-04]
RIN 2120-AA64


Airworthiness Directives; CFM International S.A. Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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SUMMARY: The FAA is correcting an airworthiness directive (AD) that 
published in the Federal Register. That AD applies to certain CFM 
International S.A. (CFM) CFM56-7B and CFM56-3 turbofan engines. Four 
headings in the Compliance section are incorrect. This document 
corrects the errors. In all other respects, the original document 
remains the same.

DATES: This final rule is effective on October 20, 2015. The effective 
date of AD 2015-18-04, Amendment 39-18262 (80 FR 55235, September 15, 
2015) remains October 20, 2015.

ADDRESSES: 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 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: Kyle Gustafson, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803; phone: 781-238-7183; 
fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION: AD 2015-18-04, Amendment 39-18262 (80 FR 
55235, September 15, 2015), requires AGB/transfer gearbox (TGB) 
magnetic chip detector (MCD) inspection of the affected gearshafts 
until removal.
    As published, four headings in the Compliance section are 
incorrect.
    No other part of the final rule has been changed.
    The effective date of AD 2015-18-04 remains October 20, 2015.

Correction of Regulatory Text


Sec.  39.13  [Corrected]

0
2. The FAA republishes airworthiness directive (AD) 2015-18-04, 
Amendment 39-18262 (80 FR 55235, September 15, 2015) as follows:

2015-18-04 CFM International S.A.: Amendment 39-18262; Docket No. 
FAA-2015-0277; Directorate Identifier 2015-NE-05-AD.

(a) Effective Date

    This AD is effective October 20, 2015.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to CFM International S.A. (CFM) CFM56-7B and 
CFM56-3 engines with a 73-tooth or 41-tooth gearshaft installed in 
the accessory gearbox (AGB), that has a gearshaft serial number in 
Appendix A or Appendix B of CFM Service Bulletin (SB) No. CFM56-7B 
S/B 72-0964, Revision 1, dated December 15, 2014.

(d) Unsafe Condition

    This AD was prompted by a report of an uncommanded in-flight 
shutdown on a CFM CFM56-7B engine following rupture of the 73-tooth 
gearshaft located in the engine AGB. We are issuing this AD to 
prevent failure of certain AGB gearshafts, which could lead to 
failure of one or more engines, loss of thrust control, and damage 
to the airplane.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(1) Initial AGB/Transfer Gearbox (TGB)/Magnetic Chip Detector (MCD) 
Inspection and Analysis for CFM56-7B Engines

    (i) For affected 73-tooth gearshafts, perform an AGB/TGB MCD 
inspection within 250 flight hours (FHs) since last inspection, 
within 25 FHs from the effective date of this AD, or when the 
gearshaft accumulates 3,000 FHs since new, whichever comes later.
    (ii) For affected 41-tooth gearshafts, perform an AGB/TGB MCD 
inspection within 250 FHs since last inspection, within 25 FHs from 
the effective date of this AD, or when the gearshaft accumulates 
6,000 FHs since new, whichever comes later.
    (iii) If any magnetic particles, including fuzz, are seen, 
determine with laboratory analysis if the particles are 73-tooth or 
41-tooth gearshaft material.
    (iv) If the particles are 73-tooth or 41-tooth gearshaft 
material, remove the affected gearshaft(s) within 75 FHs since the 
AGB/TGB MCD inspection.

[[Page 63084]]

(2) Repetitive AGB/TGB MCD Inspection and Analysis for CFM56-7B Engines

    (i) For affected 73-tooth gearshafts, perform an AGB/TGB MCD 
inspection and laboratory analysis within every 500 FHs since the 
last AGB/TGB MCD inspection until affected gearshaft is removed.
    (ii) For affected 41-tooth gearshafts, perform an AGB/TGB MCD 
inspection and laboratory analysis within every 500 FHs since the 
last AGB/TGB MCD inspection until affected gearshaft is removed.
    (iii) If any magnetic particles, including fuzz, are seen, 
determine with laboratory analysis if the particles are 73-tooth or 
41-tooth gearshaft material.
    (iv) If the particles are 73-tooth or 41-tooth gearshaft 
material, remove the affected gearshaft(s) within 75 FHs since the 
AGB/TGB MCD inspection.

(f) Mandatory Terminating Action for CFM56-7B Engines

    (1) Remove the affected 73-tooth gearshaft prior to the 
gearshaft accumulating 6,000 FHs since new or within 50 FHs after 
the effective date of this AD, whichever comes later.
    (2) Remove the affected 41-tooth gearshaft prior to the 
gearshaft accumulating 9,000 FHs since new or within 50 FHs after 
the effective date of this AD, whichever comes later.

(g) Installation Prohibition for CFM56-3 and CFM56-7B Engines

    After the effective date of this AD, do not install an affected 
gearshaft into an AGB.

(h) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(i) Related Information

    For more information about this AD, contact Kyle Gustafson, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 12 New England Executive Park, Burlington, MA 
01803; phone: 781-238-7183; fax: 781-238-7199; email: 
[email protected].

(j) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
October 20, 2015.
    (i) CFM International Service Bulletin No. CFM56-7B S/B 72-0964, 
Revision 1, dated December 15, 2014.
    (ii) Reserved.
    (4) For CFM service information identified in this AD, contact 
CFM International Inc., Aviation Operations Center, 1 Neumann Way, 
M/D Room 285, Cincinnati, OH 45125; phone: 877-432-3272; fax: 877-
432-3329; email: [email protected].
    (5) You may view this service information at FAA, Engine & 
Propeller Directorate, 12 New England Executive Park, Burlington, 
MA. For information on the availability of this material at the FAA, 
call 781-238-7125.
    (6) You may view this service information 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.

    Issued in Burlington, Massachusetts, on October 6, 2015.
Ann C. Mollica,
Acting Directorate Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2015-26345 Filed 10-16-15; 8:45 am]
BILLING CODE 4910-13-P

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