| | | 2ND-STAGE HPT BLADE |
| | | CONTINUE-IN-SERVICE LIMITS |
| CONDITION | .....................................................
| FOUND | BLADE | PERMITTED WITH REGULAR | PERMITTED WITH DECREASED |
| FIGURE 624 | AREA | TIME INSPECTIONS | TIME INSPECTIONS |
................................................................................ | Areas where the| A, B, C | None | None, but that which is | | Blade Parent | | | in the limits for Broken | | Material is | | | or Burned Hole. | | missing | | | | ....................................................…........................... | Airfoil | A, B, C | None | | Growth | | IMMEDIATELY REMOVE THE ENGINE. | 2................….........…...................................................1
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú N01 Page 686A ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
No. 17 - HPT (1st- and 2nd-Stage) Blade and Duct Segments, and (1st-Stage)
__________________________________________________________________________ Vane Inspection
_______________
S 416-160-N00
(9)
Install the access port plugs AP-8:
(a)
Remove the PWA 86441 guide tube from the AP-8 ports.
(b)
Apply Silver Goop to the plug threads.
(c)
Install the plug with a new AP-8 Gasket.
NOTE: You can use the old gasket if it is not damaged.
____
(d)
Tighten the AP-8 plugs to 40-50 pound-inches (4.519-5.649 newton-meters).
(e)
Install lockwire on the AP-8 plug.
S 416-161-N00
(10)
Install the access port plug AP-9:
(a)
Apply Silver Goop to the plug threads.
(b)
Install the plugs with new AP-9 gaskets.
NOTE: You can use the old gaskets if they are not damaged.
____
(c)
Tighten the AP-9 plugs to 40-50 pound-inches
(4.5-5.6 newton-meters).
(d)
Install lockwire on the AP-9 plug.
S 416-162-N00
(11)
Install the access port AP-10:
(a)
If the access port AP-10 is disassembled, assemble it for the installation.
NOTE: The plug assembly is not usually disassembled.
____ If you will examine the 3rd-Stage LPT vanes and blades, do not install the AP-10 access plug.
1) When you install the spring tension washer in the cover recess, make sure these conditions occur: the outer diameter of the washer touches the cover, and the concave surface of the washer is adjacent to the cover.
2) From the washer side, put the plug in the assembled washer and cover. 3) Push the cotter pin in the plug until the cotter pin head is tightly against the flat side of the plug.
(b) With the split side to the inner side, install the plug with a new AP-10 gasket.
NOTE: The plug will be in the case boss and the spring washer
____ will push the plug to the inner side.
(c) Attach the plug stop cover to the plug (AP-10).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú N02 Page 686B ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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