Document ID: chunk:federal_register_of_legislation:F2007L04228:body:0:p2
Version: federal_register_of_legislation:F2007L04228
Segment Type: other
Provision Reference: 
Character Range: 4575–8082

hours TIS.  Replace the spring assembly and re-mark the MEC.  The first MEC shop visit or engine shop visit after the MEC exceeds 10,000 hours TIS, but do not exceed 20,000 hours TIS.  Paragraph 3.A. of the Accomplishment Instructions of SB No. CF6-50 S/B 73-0119, Revision 02.
              (3) Has more then 10,000 hours TIS.                                                                                                                                                       Replace the spring assembly and re-mark the MEC.  The next MEC shop visit or engine shop visit whichever occurs first.                                                       Paragraph 3.A. of the Accomplishment Instructions of SB No. CF6-50 S/B 73-0119, Revision 02.

                2. For CF6-45A series and -50E series engines that have an MEC that has a P/N listed in Table 1 of this AD, replace the CDP restoring spring assembly as follows in Table 3 of this AD.

             Table 3. - Compliance Schedule for CF6-45A and -50E Engines
             If the CDP restoring spring assembly in your MEC                                                                                                                                          Then                                              By                                                                                                                         Use
             (1) Was already replaced within 10,000 or fewer hours time-in-service (TIS) before the effective date of this AD, and the replacement spring assembly (P/N 3018-248) had zero hours TIS.  Replace the spring assembly and re-mark the MEC.  The first MEC shop visit or engine shop visit after the MEC exceeds 10,000 hours TIS, but do not exceed 20,000 hours TIS.  Paragraph 3.A. of the Accomplishment Instructions of SB No. CF6-50 S/B 73-0120, dated 21 March 2007.
             (2) Has more then 10,000 hours TIS.                                                                                                                                                       Replace the spring assembly and re-mark the MEC.  The next MEC shop visit or engine shop visit whichever occurs first.                                                       Paragraph 3.A. of the Accomplishment Instructions of SB No. CF6-50 S/B 73-0120.

             Definition:  For the purpose of this AD, a shop visit is induction of the engine or MEC into the shop for any cause.

                3. Do not install an MEC that:

                  a) Has not complied with SB No. CF6-50 S/B 73-0119, Revision 02, or earlier revision, or SB No. CF6-50 S/B 73-0120; or

                  b) Has not had the CDP restoring spring replaced with a spring assembly, P/N 3018-248, or FAA-approved equivalent spring assembly, within the previous 10,000 hours of MEC operation.

             Note 2:  FAA AD 2007-19-06 Amdt 39-15196 dated 7 September 2007 refers.
Compliance:     1. As detailed in Table 2 of this AD.

                2. As detailed in Table 3 of this AD.

                3. From the effective date of this AD.

             This Airworthiness Directive becomes effective on 22 November 2007.
Background:  The FAA reports that there have been five events involving fractured CDP restoring spring assembly.  The issuing of this AD is intended to prevent loss of engine thrust control that could lead to loss of control of the aeroplane.

David Punshon
Delegate of the Civil Aviation Safety Authority

2 October 2007