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AD/CFM56/7 Amdt 4 - Fan Disk Inspection
CFM International Turbine Engines - CFM5CFM International Turbine Engines - CFM56 Series
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CFM International Turbine Engines - CFM56 Series
| AD/CFM56/7 Amdt 4 | Fan Disk Inspection | 7/2005 |
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| Applicability: | CFM56-3B-1, CFM56-3B-2 and CFM56-3C-1 turbofan engines. |
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| Requirement: | Use of ZIP D5460 NS and ZIP D5460 products to lubricate fan blades is no longer allowed.Perform an inspection of the fan disk in accordance with CFM56-3/-3B/-3C Service Bulletin (SB) 72-0854 Revision 5.Report the results of the inspection to CFM International.Note: DGAC AD 1997-298R4 EASA approval No. 2005-1915 dated 22 February 2005 refers. |
| Compliance: | From the effective date of this Directive.In accordance with the compliance periods detailed in CFM56-3/-3B/-3CSB 72-0854 Revision 5.No later than 30 days after the completion of the inspection. |
| This Amendment becomes effective on 7 July 2005. | |
| Background: | Engine test results and theoretical analysis have shown there is a likelihood of heavy wear on fan disk dovetail pressure faces. This Directive specifies a one time, on-wing inspection to identify worn fan disks and carry out rectifying maintenance to return worn disks to service.Amendment 4 is raised to detail the latest revision of manufacturers SB and DGAC Airworthiness Directive.Amendment 3 of this Airworthiness Directive became effective on 10 August 2000.Amendment 2 of this Airworthiness Directive became effective on 5 November 1998.Amendment 1 of this Airworthiness Directive became effective on 29 January 1998. |
| The original issue of this Airworthiness Directive became effective on 1 January 1998. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
27 May 2005