747-400 AMM 飞机维护手册 发动机 ENGINE 1(95)

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 (5)  Compare the damage as identified in Figure 626 with the continue-in-service limits shown in Figure 626 and Table 612.
 NOTE: The frequency of the regular time inspection that is referred
____ to in the tables is from our Maintenance Planning Document. The frequency of the decreased time inspection is two times the frequency of the regular time inspection. In other words, the interval between decreased time inspections is half the interval of regular time inspections.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////

3RD-STAGE LPT BLADE
A
L-A5194
3rd-Stage LPT Blade Continue-In-Service Limits Figure 626
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~..............................................................................
 | TABLE 612 |
 ................................................................................

 |  |  |  3RD-STAGE LPT BLADE CONTINUE-IN-SERVICE LIMITS  |
 |  CONDITION  |  ................................................... ..
 |  FOUND  |  BLADE  |  SERVICEABLE  |  REMOVE THE ENGINE  |
 |  (FIGURE 626)  |  AREA  |  LIMITS  |  BEFORE THE 6TH CYCLE  |

 ................................................................................ | Cracks and | A,B,C,E | No cracks or tears | No cracks or tears | | Tears | | are permitted | are permitted | | ............................................................... | | D | No cracks or tears | A tight radial crack or | | | | are permitted | tear that is no more | | | | | than 0.100 inch (2.54 mm)| | | | | in length. . | ................................................................................ | Nicks | A,C,D,E | All nicks that are no | All nicks that are no | | | | more than 0.015 inch | more than 0.050 inch | | | | (0.381mm) in depth. | (1.27 mm) in depth. | | ............................................................... | | B | No nicks are permitted | All nicks that are no | | | | | more than 0.030 inch | | | | | (0.762 mm) in depth. | 2................….........…........................…..........................1 | Rounded Bottom | A,C,D | All dents that are no | All dents that are no | | Dents | | more than 0.020 inch | more than 0.050 inch | | | | (0.508 mm) in depth | (1.270 mm) in depth. | | | | and no more than 0.125 | | | | | inch (3.175 mm) in | | | | | diameter. | | | ............................................................... | | B | All dents that are no | All dents that are no | | | | more than 0.020 inch | more than 0.030 inch | | | | (0.508 mm) in depth | (0.762 mm) in depth. | | | | and no more than 0.125 | | | | | inch (3.175 mm) in | | | | | diameter. | | | ............................................................... | | E | All dents that are | All dents that are more | | | | less than 0.020 inch | than the SERVICEABLE | | | | (0.508 mm) in depth | LIMITS. | | | | and less than 0.100 | | | | | inch (2.540 mm) in | | | | | diameter, or one dent | | | | | that is 0.020-0.030 | | | | | inch (0.508-0.762 mm) | | | | | in depth and 0.100-0.50| | | | | (2.54-12.7 mm) in | | | | | diameter. | | ................................................................................
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~..............................................................................
 | TABLE 612 |
 ................................................................................
　
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