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2) There is no limit on the quantity of nicks, dents and scratches if: a) The nicks and dents are not more than
0.01 inch (0.2 mm) in depth. b) A 50 cycle maximum service extension is permitted if the nicks, dents and sheared edges are not more than 0.035 inch (0.9 mm) in depth. 3) There is no limit on the quantity of wear because of shingling if not more than 0.005 inch (0.1 mm) in depth after the removal of high metal.
4) Shingled mid-span shrouds are not serviceable. A 50 cycle maximum service extension is permitted as follows (Fig. 602): NOTE: Shingling is not easy to find if you look at the ____ fan directly from the front. To correctly examine for shingling, the mid-span shroud interfaces must be seen while the fan rotor is slowly turned by hand. a) There is no sign of contact in the airfoil to shroud fillet. b) There is no sign of shroud distortion. NOTE: Compare the blade with an adjacent blade for ____ reference.
c) Turn the shingled blades to the 12 o'clock position and unshingle by hand. d) Remove the blades for a full inspection in the shop before the 50 cycles extension is completed. (h) Tip: 1) There is no limit on the quantity of blades with tip curl of the leading edge as follows: a) The tip curl does not extend more than 0.5 inch (12.7 mm) across the blade tip. b) The tip curl does not extend more than 0.5 inch
(12.7 mm) down the leading edge. c) The maximum deflection from the initial contour is not more than 0.25 inch (6.3 mm). d) The angle of the deflection is not more than 60 degrees.
2) A maximum of six blades with tip curl of the leading edge is permitted with the limits as follows: a) The tip curl does not extend more than 1.3 inch (33 mm) across the blade tip. EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-31-02 ALL ú ú C01 Page 606 ú Mar 15/96 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. ////////////////////////A / / CFM56 ENGINES 737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S-M56-MM-03455-00-B Shingled Mid-Span Shrouds Figure 602 F61811 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-31-02 ALL ú ú C01 Page 607 ú Mar 15/96 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. ////////////////////////A / / CFM56 ENGINES 737-300/400/500/ /MAINTENANCE MANUAL //////////////////////// b) The tip curl does not extend more than 2.0 inch (51 mm) down the leading edge. c) The maximum deflection from the initial contour is not more than 0.6 inch (15 mm). d) The angle of the deflection is not more than 60 degrees. e) No more than three adjacent blades have tip curl with the specified limits. 3) One blade with tip curl of the leading edge is permitted with the limits as follows: a) The tip curl does not extend more than 2.0 inch (51 mm) across the tip of the blade. b) The tip curl does not extend more than 2.0 inch (51 mm) down the leading edge. c) The maximum deflection from the initial contour is not more than 1.0 inch (25 mm). d) The angle of the deflection is not more than 45 degrees. 4) There is no limit on the quantity of blades with tip curl of the trailing edge as follows. a) The tip curl does not extend more than 0.5 inch (12.7 mm) across the blade tip. b) The tip curl does not extend more than 0.5 inch
(12.7 mm) down the trailing edge. c) The maximum deflection from the initial contour is not more than 0.25 inch (6.3 mm). d) The angle of the deflection is not more than 60 degrees.
5) A maximum of six blades with tip curl of the trailing edge is permitted with the limits as follows: a) The tip curl does not extend more than 1.0 inch (25 mm) across the blade tip. b) The tip curl does not extend more than 1.0 inch (25 mm) down the trailing edge. c) The maximum deflection from the initial contour is not more than 0.3 inch (7.6 mm). d) The angle of the deflection is not more than 60 degrees. e) No more than three adjacent blades have tip curl with the specified limits. S 096-006-C00 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 ENGINE 发动机 2
