Airworthiness directives › 2007-19-06
AD 2007-19-06 Airworthiness Directives; General Electric Company Aircraft Engine Group (GEAE) CF6-45A Series, CF6-50A, CF6-50C Series and CF6-50E Series Turbofan Engines
Applicability*9
This AD applies to 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. 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 airplanes. 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, -50C1, -50C2, -50C2B, -50C2D, -50C2F, -50C2R. 8062-275 8062-279 9070M55P42 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, -50E1, -50E2, -50E2B 8062-276 8062-280 9187M29P10 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 (d) This AD results from reports of five events involving fractured compressor discharge pressure (CDP) restoring spring assembly. We are issuing this AD to prevent loss of engine thrust control that could lead to loss of control of the airplane.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Replacing the CDP Restoring Spring Assembly on CF6-50A Engines and -50C Series Engines (f) 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 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 March 21, 2005 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 March 9, 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 remark 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, dated March 9, 2007. (3) Has more then 10,000 hours TIS Replace the spring assembly and remark 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, dated March 9, 2007. Replacing the CDP Restoring Spring Assembly on CF6-45A and -50E Series Engines (g) 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 remark 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 March 21, 2007. (2) Has more then 10,000 hours TIS Replace the spring assembly and remark 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, dated March 21, 2007. Definition (h) For the purpose of this AD, a shop visit is induction of the engine or MEC into the shop for any cause. Installation Prohibition (i) After the effective date of the AD, do not install an MEC that: (1) Has not complied with SB No. CF6-50 S/B 73-0119, Revision 02, dated March 9, 2007 or earlier revision, or SB No. CF6-50 S/B 73-0120, dated March 21, 2007, or (2) 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. Alternative Methods of
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