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Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines
Rules and Regulations
D09002ee1be062ab2
D09002ee1be062b53
United States
Department of Transportation
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United States Government Agency or Subagency
United States
Federal Aviation Administration
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United States Government Agency or Subagency
This amendment adopts a new airworthiness directive (AD), applicable to General Electric Company (GE) CF6-45/-50 series turbofan engines, that requires reduction of the low cycle fatigue (LCF) retirement lives for certain high pressure turbine rotor (HPTR) stage 2 disks, and would provide a drawdown schedule for those affected parts with reduced LCF retirement lives. This amendment is prompted by the results of a refined life analysis performed by the manufacturer which revealed minimum calculated LCF lives significantly lower than published LCF retirement lives. The actions specified by this AD are intended to prevent a LCF failure of the HPTR stage 2 disk, which could result in an uncontained engine failure and damage to the aircraft.
60 FR 18540
https://www.govinfo.gov/app/details/FR-1995-04-12/95-8712
95-8712
fr12ap95-3
4910-13-U
Docket No. 94-ANE-37
Amendment 39-9192
AD 95-08-03
https://www.govinfo.gov/app/details/FR-1995-04-12/95-8712
https://www.govinfo.gov/content/pkg/FR-1995-04-12/html/95-8712.htm
https://www.govinfo.gov/content/pkg/FR-1995-04-12/pdf/95-8712.pdf
3 p.
18540
18542
60 FR 18540
Code of Federal Regulations
Title 14 Part 39
14 CFR Part 39
Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines; Federal Register Vol. 60, Issue
RULE
95-8712
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
1995-06-12
Docket No. 94-ANE-37
Amendment 39-9192
AD 95-08-03
4910-13-U
95-8712
Final rule.
This amendment adopts a new airworthiness directive (AD), applicable to General Electric Company (GE) CF6-45/-50 series turbofan engines, that requires reduction of the low cycle fatigue (LCF) retirement lives for certain high pressure turbine rotor (HPTR) stage 2 disks, and would provide a drawdown schedule for those affected parts with reduced LCF retirement lives. This amendment is prompted by the results of a refined life analysis performed by the manufacturer which revealed minimum calculated LCF lives significantly lower than published LCF retirement lives. The actions specified by this AD are intended to prevent a LCF failure of the HPTR stage 2 disk, which could result in an uncontained engine failure and damage to the aircraft.
Effective June 12, 1995.
Robert J. Ganley, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA [[Page 18541]] 01803-5299; telephone (617) 238-7138; fax (617) 238-7199.
Federal Register
Vol. 60, no. 70
Office of the Federal Register, National Archives and Records Administration
1995-04-12
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196 p.
Table of Contents:
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GS 4.107:
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https://www.govinfo.gov/app/details/FR-1995-04-12
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0097-6326
0042-1219
0364-1406
769-004-00000-9
000582072
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https://www.govinfo.gov/app/details/FR-1995-04-12
https://www.govinfo.gov/content/pkg/FR-1995-04-12/pdf/FR-1995-04-12.pdf
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18539
186704
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2010-09-25
2023-05-07
FR-1995-04-12
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FR
FR-1995-04-12
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