曝光臺 注意防騙 網曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~............................................................................... | TABLE 609 | ................................................................................. | | | 1ST-STAGE HPT VANES | | | | CONTINUE-IN-SERVICE LIMITS | | CONDITION | ........................................................ | FOUND | VANE | PERMITTED WITH REGULAR | PERMITTED WITH DECREASED | |FIGURE 621 | AREA | TIME INSPECTION | TIME INSPECTION | ....................................................…............................ | Nicks and | Leading | Nicks and rounded bottom dents that are not more than| | Dents | Edge, | 0.125 inch (3.175 mm) in length or diameter, and | | | Airfoils, | 0.0312 inch (0.792 mm) in depth | | | | | | | Platforms ____If View Angle is such that depth can be
| NOTE: | | | | determined, the maximum nick and round bottom | | | | dent depth is 0.312 inch (0.792 mm). | | ..................................................................... | | Trailing | On each vane, no more than two nicks or dents, at the| | | Edge | given limits, that are apart by a minimum of 0.750 | | | | inch (19.050 mm). No more than five vanes at the | | | | given limits on each engine. | | | | | | | | Five Vanes Maximum Per Engine. | ................................................................................. | Worn | All | All quantities. | | Surface | | | | Layer | ____Prolonged operation with severe coating loss
| NOTE: | | | | will eventually lead to base material | | | | burning, erosion, or material degradation, | | | | such that the vane may become non-repairable. | .................................................................................
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
~............................................................................... | TABLE 609 | ................................................................................. | | | 1ST-STAGE HPT VANES | | | | CONTINUE-IN-SERVICE LIMITS | | CONDITION | ........................................................ | FOUND | VANE | PERMITTED WITH REGULAR | PERMITTED WITH DECREASED | |FIGURE 621 | AREA | TIME INSPECTION | TIME INSPECTION | ....................................................…............................
 | Burned  | All  | Permitted with no  | Permitted with material  |
 | Areas,  |  | apparent material loss,  | loss to the material  |
 | Erosion  |  | unless view angle is  | breakthrough limit of  |
 |  |  | such that depth can be  | this table.  |
 |  |  | determined.  The maximum |  |
 |  |  | depth permitted is  |  |
 |  |  | 0.0312 inch (0.792 mm).  |  |
 |  |  |  |  |
 |  |  | Largest single burned or | Largest single burned or  |
 |  |  | eroded area is .15 inch  | eroded area is .5 inch  |
 |  |  | in diameter and no more  | in diameter and no more  |
 |  |  | than 0.02 square inch  | than 0.07 square inch  |
 |  |  | (13.0 square mm) in area.| (45.0 square mm) in area. |
 |  |  |  |  |
 |  |  | NOTE:____ See Material Breakthrough or Burn Through if  |
 |  |  |  exceedance of reduced interval inspection  |
 |  |  |  limit.  |
 |  |  |  |
 |  |  | Cracks associated with a burned or eroded are  |
 |  |  | permitted to the crack length limit of this table.  |

 ................................................................................. | Burned or | All | None | Holes broken through to | | Broken | | | the internal cavity that | | Holes in | | | are less than 0.500 inch | | the Base | | | (12.700 mm) in diameter. | | Material | | | No more than five vanes | | | | | at the given limits in | | | | | each engine. | 2...........…............…..........................…...........................1 | Cracks, | Leading | All quantities of cracks between two adjacent cooling| | Axial and | Edge | air holes, if there are a minimum of three holes in a| | Radial | | row without cracks, in all directions around each | | | | crack. | | | ........................................................
　
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