Document ID: chunk:federal_register_of_legislation:F2007L04228:body:0:p1
Version: federal_register_of_legislation:F2007L04228
Segment Type: other
Provision Reference: 
Character Range: 0–4812

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

General Electric Turbine Engines - CF6 Series
AD/CF6/68  Compressor Discharge Pressure Spring  12/2007

Applicability:  General Electric Company Aircraft Engine Group (GEAE) CF6-45A, 45A2, -50A,
                -50C, -50CA, -50C1, -50C2, -50C2B, -50C2D, -50C2F, -50C2R, -50E, -50E1, -50E2, and -50E2B turbofan engines that have a main engine control (MEC) with a part number (P/ N) specified in Table 1 of this AD installed.

                Note 1:  These engines are installed on, but not limited to, Airbus A300 series airplanes, McDonnell Douglas DC-10, KC-10, and MD-10 series airplanes, and Boeing 747 series aeroplanes.

                Table 1. - Affected Woodward and GEAE
                P/Ns for MECs by Engine Model Series
                Engine Model Series     Woodward P/N  GEAE P/N
                CF6-50A, -50C, -50CA,   8062-275      9070M55P42
                -50C1, -50C2, 50C2B,
                -50C2D, -50C2F, -50C2R
                                        8062-279      9070M55P44
                                        8062-287      9070M55P49
                                        8062-289      9070M55P51
                                        8062-819      9070M55P101
                                        8062-822      9070M55P102
                                        8062-824      9070M55P103
                                        8062-823      9070M55P104
                                        8062-826      9070M55P105
                                        8062-827      9070M55P106
                                        8062-828      9070M55P107
                                        8062-829      9070M55P108
                CF6-45A, -45A2, -50E,   8062-276      9187M29P10
                -50E1, -50E2, -50E2B
                                        8062-280      9187M29P11
                                        8062-290      9187M29P14

                8062-291  9187M29P15
                8062-817  9187M29P100
                8062-820  9187M29P101
                8062-896  9187M29P22
                8062-897  9187M29P23
                8062-898  9187M29P20
                8062-899  9187M29P21

Requirement:     1. For CF6-50A model engines and -50C series engines that have an MEC that has a P/N listed in Table 1 of this AD, replace the compressor discharge pressure (CDP) restoring spring assembly as follows in Table 2 of this AD.

              Table 2. - Compliance Schedule for CF6-50A and -50C Engines
              If the CDP restoring spring assembly in your MEC                                                                                                                                          Then                                              By                                                                                                                         Use
              (1) Was already replaced using GEAE CF6-50 S/B 73-0119, dated                                                                                                                             Re-mark the MEC.                                  The next time the MEC is routed for repair such as the next MEC shop visit.                                                Paragraph 3.A. of the Accomplishment Instructions of SB No. CF6-50 S/B 73-0119, Revision 02, dated
              21 March 2005.                                                                                                                                                                                                                                                                                                                                                         9 March 2007.
              (2) 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