(c)
Monitor the measuring grid tip (5) (Fig. 804), and position the drive shaft head (2) (Fig. 802, Sheet 2) to the 90-degree position.
(d)
Position the measuring grid tip (5) (Fig. 804) near the HPC blade damage area.
NOTE: Each square on the grid is .050 x .050 inch (1,30 x
____ 1,30 mm). The overall grid size is 0.250 x 0.250 inch
(6.35 x 6.35 mm).
(e)
Write down the damage results such as defect size and location.
(f)
Compare the recorded blade damage against the permitted blend limits.
NOTE: Make sure the blade damage is less than the permitted
____
blend limits.
(g)
If the damage is less than permitted limits, find the length of the blend necessary to keep the minimum blend radius (Fig. 803).
(h)
Calculate the minimum blend radius at eight times the depth of the defect, or fourtimes on both sides of the center of the blade defect (Fig. 803).
(i)
Put the drive shaft head (2) (Fig. 802, Sheet 2) at the 0-degree position, and remove the tool from the borescope port.
(j)
Put the drive shaft head (2) (Fig. 802, Sheet 2) at the 90-degree position. Loosen the lockscrew and remove the measuring grid tip (5) (Fig. 804) from the drive shaft head.
(k)
Loosen the lockscrew and remove the measuring grid tip (5) (Fig. 804) from the drive shaft head.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 804 ú Mar 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 328-010-C00
CAUTION:_______ DO NOT INSTALL OR REMOVE A TOOL TIP FROM THE DRIVE SHAFT HEAD
WITH THE DRIVE SHAFT HEAD IN THE 0-DEGREE POSITION. IF YOU
REMOVE THE TOOL TIP WITH THE DRIVE SHAFT HEAD IN THE 0-DEGREE
POSITION, THE DRIVE BELT WILL DISENGAGE.
CAUTION:_______ MAKE SURE THE BLEND TIP IS POINTED AWAY FROM THE OPERATOR IN
THE 90-DEGREE POSITION. START THE DRIVE MOTOR AND MAKE SURE
THE TIP ROTATES IN THE CLOCKWISE DIRECTION. IF THE DIRECTION
OF ROTATION IS COUNTERCLOCKWISE, CHECK THE DRIVE BELT FOR
POSSIBLE TWISTED INSTALLATION.
(2) Blade blending procedure.
(a) Put the drive shaft head (2) (Fig. 802, Sheet 2) at the 90-degree position and use the applicable grind tip to blend the HPC stage damaged (Fig. 804).
NOTE: Use longer blend tool tips for the forward blades and
____ shorter blend tool tips for the aft blades.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 805 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
CAUTION: DO NOT INSTALL OR REMOVE A TOOL TIP FROM THE DRIVE SHAFT
_______ HEAD WITH THE DRIVE SHAFT HEAD IN THE 0-DEGREE POSITION. IF YOU REMOVE THE TOOL TIP WITH THE DRIVE SHAFT HEAD IN THE 0-DEGREE POSITION, THE DRIVE BELT WILL DISENGAGE.
CAUTION: MAKE SURE THE BLEND TIP IS POINTED AWAY FROM THE
_______ OPERATOR IN THE 90-DEGREE POSITION. START THE DRIVE MOTOR AND MAKE SURE THE TIP ROTATES IN THE CLOCKWISE DIRECTION. IF THE DIRECTION OF ROTATION IS COUNTERCLOCKWISE, CHECK THE DRIVE BELT FOR POSSIBLE TWISTED INSTALLATION.
(b)
Apply the light source to the blend tool.
(c)
Put the blend tool tip in the 0-degree position. Put the blend tool tip into the compressor through the borescope access port.
(d)
Put the primary blade edge grinding tip (1) (Fig. 804) in the borescope port, view the tool tip, and move the tool tip from the 0-degree to the 90-degree position.
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