Preliminary Requirements

Procedure

1. SUBTASK 72-31-00-220-056 Reference Fits and Clearances of the Stage 1 Fan Disk and the Front Blade Retaining Ring at Location 0103

   1. Refer to Figure.

   2. Reference dimensions at Location 0103. If required, use the data written as the note in TASK 72-31-12-200-000 and TASK 72-31-13-200-000.

      Table 1. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 0103
      Stage 1 Fan Disk LPC Fan Disk And Fan Blade Rear Retaining Ring (72-31-12, 01-200)
      Front Blade Retaining Ring ENGINE-LP COMPRESSOR BLADES RETAINING RING (72-31-13, 01-160)
      Stage 1 Fan Disk Outside Diameter	13.9001	Intf	13.9001	Intf
      	13.9023	0.0003	13.9023	0.0003
      Front Blade Retaining Ring Bore Diameter	13.8977	0.0046	13.8977	0.0046
      	13.8998	Intf	13.8998	Intf

      Table 2. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 0103
      Stage 1 Fan Disk LPC Fan Disk And Fan Blade Rear Retaining Ring (72-31-12, 01-200)
      Front Blade Retaining Ring ENGINE-LP COMPRESSOR BLADES RETAINING RING (72-31-13, 01-160)
      Stage 1 Fan Disk Outside Diameter	353.062	Intf	353.062	Intf
      	353.119	0.005	353.119	0.005
      Front Blade Retaining Ring Bore Diameter	353.000	0.119	353.000	0.119
      	353.057	Intf	353.057	Intf

2. SUBTASK 72-31-00-430-051 Attach the Vertical Sling on to the Stage 1 Fan Disk (72-31-12, 01-200) and the Parking Stand

   1. Refer to Figure.

   2. Lift and move IAE 1J12304 Vertical sling 1 off and IAE 1J12305 Parking stand 1 off to the work area.

   3. Set the Stage 1 Fan Disk on to a pallet with the rear face of the disk to the top.

   4. Attach the vertical sling to the curvic teeth of the Stage 1 Fan Disk.

      1. Loosen the four locknuts of the set bolts.

      2. Turn the four dowel indicators on the end of the set bolts to point to the axis of the vertical sling.

      3. Attach the sling on to the curvic teeth of the Stage 1 Fan Disk.

      4. Turn the four dowel indicators to point in a direction opposite to the axis of the vertical sling.

      5. Tighten the locknuts to safety the set bolts.

   5. Attach a hoist to the vertical sling.

   6. Lift the Stage 1 Fan Disk and put on to the parking stand.

   7. Remove the hoist.

   8. Remove the sling.

      1. Loosen the four locknuts of the set bolts.

      2. Turn the four dowel indicators on the end of the set bolts to point to the axis of the vertical sling.

      3. Remove the vertical sling.

3. SUBTASK 72-31-00-430-052 Attach the Rear Blade Retaining Ring (72-31-12, 01-100) to the Stage 1 Fan Disk

   1. Refer to Figure.

   2. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 22 bolts LPC Fan Disk And Fan Blade Rear Retaining Ring (72-31-12, 01-120).

   3. Install the rear blade retaining ring to the rear face of the disk with the bolts.

      1. Make sure that the correlation marks on the Stage 1 Fan Disk and the rear retaining ring are aligned.

      2. Make sure that the four shoulder headless pins on the Stage 1 Fan Disk are engaged with the holes in the rear blade retaining ring.

   4. Torque the bolts to 180 lbfin to 220 lbfin (20.00 Nm to 25.00 Nm) in the sequence shown on Figure.

4. SUBTASK 72-31-00-430-053 Attach the Guide Pins to the Stage 1 Fan Disk

   1. Refer to Figure.

   2. Install a set of retaining plates, part of the IAE 1J12307 Balance arbor to the opposite face of the curvic teeth of the Stage 1 Fan Disk. Safety the retaining plates with the six retaining bolts, part of the balance arbor.

   3. Install the three guide pins, part of the balance arbor, to the retaining plate at the same distance through the holes on the flange coupling of the disk.

5. SUBTASK 72-31-00-220-051 Visually Examine the Two Halves of the Stage 1 Fan Disk and the Balancing Arbor Curvic Coupling

   1. The two curvic teeth are clean and no damage.

6. SUBTASK 72-31-00-430-054 Attach the Balance Arbor to the Stage 1 Fan Disk Assembly

   1. Refer to Figure.

   2. Lift and move IAE 1J12399 Handling sling 1 off and IAE 1J12307 Balance arbor 1 off to the work area.

   3. Attach the handling sling to the opposite end of the curvic teeth face of the balance arbor with the six bolts, part of the handling sling.

   4. Attach a hoist to the handling sling.

   5. Lift the balance arbor.

   6. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 24 curvic coupling bolts, part of the balance arbor.

   7. NOTE

      Refer to Figure or the position of the correlation marks on the Stage 1 Fan Disk.

      The correlation mark of the balance arbor is on the outer diameter of the curvic adapter.

      Lower the balance arbor in to the Stage 1 Fan Disk. Make sure that the three guide pins are engaged with the holes in the curvic adapter of the balance arbor. Make sure that the correlation marks on the curvic adapter and the Stage 1 Fan Disk are aligned.

   8. Attach the balance arbor to the Stage 1 Fan Disk and remove the three guide pins.

   9. Install the 24 bolts, part of the balance arbor to the fan disk through the holes in the arbor flange. Turn the bolts until they touch lightly the arbor flange surface.

   10. NOTE

       Do this operation with two persons. One person hold the Stage 1 Fan Disk when the other person torques the bolts.

       Torque the bolts in the sequence shown on Figure.

       1. Torque the bolts to 443 lbfin to 566 lbfin (50 Nm to 64 Nm).

       2. Torque the bolts to 885 lbfin to 1133 lbfin (100 Nm to 128 Nm).

       3. Do Step again to make sure all the bolts are at the necessary torque.

7. SUBTASK 72-31-00-430-055 Install the Stage 1 Fan Disk, the Rear Blade Retaining Ring and the Balance Arbor Assembly to the Turnover Stand

   1. Refer to Figure.

   2. Move IAE 1J12301 Turnover stand 1 off or IAE 1J12128 Turnover stand 1 off to the work area.

   3. Turn the handle, part of the turnover stand, until the support, part of the turnover stand, is in the highest position.

   4. Loosen the two wing nuts to open the two clamps, part of the turnover stand.

   5. Attach a hoist to the handling sling.

   6. Lift the Stage 1 Fan Disk, the rear blade retaining ring and the balance arbor assembly from the parking stand.

   7. Attach the balance arbor of the assembly to the turnover stand.

   8. Close the two halves of the clamps and safety the Stage 1 Fan Disk, the rear blade retaining ring and the balance arbor assembly with the two wing nuts.

   9. Hold the handling sling and remove the hoist from the sling.

   10. Remove the six bolts and remove the handling sling from the balance arbor.

   11. Turn the Stage 1 Fan Disk, the rear blade retaining ring and the balance arbor assembly from vertical to horizontal with the handle.

8. SUBTASK 72-31-00-430-056 Calculate the Stage 1 Fan Blade Distribution Sequence

   1. Refer to Figure.

   2. NOTE

      The blade repairs, VRS1064 (repair) and VRS1065 (Aircraft Maintenance Manual) require to moment weigh the fan blades.

      Make sure that the values of the moment weight marked on the fan blades are the latest ones. If it is not thought that they are the latest, moment weigh the fan blades. Refer to TASK 72-31-11-820-001 (Special Procedures).

   3. Read the following values marked on the fan blades.

      - Blade part number.

      - Blade serial number.

      - Radial moment weight.

      - Axial moment weight.

      - Tangential moment weight.

   4. Weigh the fan blades.

   5. Calculate the fan blade distribution sequence. Use the IAE 1J12312 Fan blade distribution program 1 off, IAE 1J12306 Fan blade distribution program C 1 off or IAE 1J12308 Fan blade distribution program BASIC 1 off.

      1. Input the data given in Step and Step to the fan blade distribution program.

      2. Get the optimized position number of the fan blades from the program.

9. SUBTASK 72-31-00-430-057 Weigh the Annulus Fillers (01-100)

   1. Weigh each annulus filler and write the weight on the outer surface of each filler with CoMat 06-069 MARKER.

   2. NOTE

      If the computor calculated assembly procedure is available, it is better than the heavy-light-heavy procedure.

      Put the annulus fillers on a work bench, in a heavy-light-heavy sequence. Refer to Figure.

10. SUBTASK 72-31-00-430-058 Install the Stage 1 Fan Blades in to the Stage 1 Fan Disk Assembly

    1. Refer to Figure, Figure, Figure and Figure.

    2. Make sure of the blade installation sequence calculated by the computer.

    3. Apply CoMat 10-038 PETROLEUM JELLY or CoMat 10-041 PETROLATUM, WHITE to the bottom faces on the front and the rear chocking pads of the blades.

    4. Apply CoMat 10-038 PETROLEUM JELLY or CoMat 10-041 PETROLATUM, WHITE to the slot on the disk.

       1. 

          CAUTION

          DO NOT APPLY THE LUBRICANT TO THE BLADE DOVETAIL. UNWANTED MATERIAL CAN TOUCH THE LUBRICANT APPLIED TO THE BLADE DOVETAIL. THE UNWANTED MATERIAL CAN CAUSE DAMAGE TO THE BLADE DOVETAIL AND THE DISK SLOT WHEN YOU INSTALL THE BLADE IN TO THE DISK.

          Apply CoMat 10-038 PETROLEUM JELLY or CoMat 10-041 PETROLATUM, WHITE to the zone A and the zone B on the disk.

    5. Install the adapter (part of the handling sling) on the balance arbor with the six bolts (part of the handling sling).

    6. Install IAE 1J12093 Fan blade installation pusher 1 off on the adpater with the single acting pin (part of the handling sling).

    7. Install the blades in to the disk with the fan blade installation pusher in a clockwise direction when you look from the front of the engine.

       1. Put the blade root in to the disk slot.

       2. Put the pad (part of the installation pusher) and pusher (part of the installation pusher) on the blade root through the hole of the support and set the pad with the wing bolt (part of the installation pusher).

       3. Install the support (part of the installation pusher) with two screws (part of the installation pusher).

       4. Turn the handle (part of the installation pusher) in the direction D to push the blade rearward fully.

       5. Repeat Step through Step until all the blades are installed in to the disk.

    8. Remove the installation pusher from the adapter.

       1. Remove the single acting pin from the handling sling and remove the installation pusher from the adapter.

11. SUBTASK 72-31-00-430-059 Install the Annulus Fillers (72-31-11, 01-100) to the Bladed Disk Assembly

    1. 

       CAUTION

       DO NOT MOVE THE BLADE BEFORE YOU INSTALL THE FRONT BLADE RETAINING RING. THE ANNULUS FILLERS WHICH ARE NEAR THE BOTTOM CAN BE RELEASED WHEN THE ADJACENT BLADES ARE MOVED BY THE EXTERNAL FORCE.

       Apply CoMat 10-038 PETROLEUM JELLY or CoMat 10-041 PETROLATUM, WHITE to the annulus filler rubber seals.

    2. Install the annulus fillers between the blades and hang the rear guide pins to the holes in the rear blade retaining ring. Refer to Figure.or the heavy-light-heavy sequence.

       1. Install the heaviest annulus filler between the two blade roots at any position around the Stage 1 Fan Disk. This gives the position H1.

       2. Install the second heaviest annulus filler on the opposite side at the position H2.

       3. Install the lightest annulus filler at the position L1.

       4. Install the second lightest annulus filler at the position L2.

       5. Install the remaining annulus fillers between the blades in the heavy-light-heavy sequence.

12. SUBTASK 72-31-00-430-060-A00 V2500-A1: Install the Front Blade Retaining Ring (72-31-13, 01-160) to the Bladed Disk Assembly

    1. Refer to Figure.

    2. NOTE

       You may ignore this step where the interference at the location 0103 is not tight.

       Increase the temperature of the front blade retaining ring to 176 deg F (80 deg C) in an air-circulating oven.

    3. Align and engage the three aligning holes in the front blade retaining ring with the three headless pins attached to the Stage 1 Fan Disk.

    4. Use the four pusher bolts (part of IAE 1J12141 Pusher bolt set 1 off) to push the front blade retaining ring to the mating face of the Stage 1 Fan Disk.

       1. Turn each pusher bolt to push equally the flange of the front blade retaining ring.

       2. Do this operation until each aligning hole in the front blade retaining ring engages correctly with the headless pins.

    5. Use a clean cloth, made moist with CoMat 01-124 ISOPROPYL ALCOHOL, to erase the temporary marks written on the outer surfaces of the annulus fillers.

    6. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 36 bolts (01-120).

    7. Remove the pusher bolts.

    8. Attach the front blade retaining ring to the Stage 1 Fan Disk with the 36 bolts.

    9. Torque the 36 bolts to 180 lbfin to 220 lbfin (20.00 Nm to 25.00 Nm) in the sequence shown, refer to Figure.

    10. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 22 bolts (01-140).

    11. Attach the front blade retaining ring to the annulus fillers with the 22 bolts.

    12. Torque the 22 bolts to 85 lbfin to 105 lbfin (10.00 Nm to 12.00 Nm) in the sequence given in the subsequent steps.

        1. Torque the first two bolts 180 degrees apart.

        2. Torque the second two bolts 90 degrees and 270 degrees apart from the first bolt.

        3. Do 180/90 degrees pattern and torque the remaining bolts.

        4. Do the Step, Step and Step again to make sure all the bolts are at the necessary torque of 85 lbfin to 105 lbfin (10.00 Nm to 12.00 Nm).

    13. Make sure that there are no clearances between the annulus fillers and the front blade retaining ring.

13. SUBTASK 72-31-00-430-060-B00 V2500-A5: Install the Front Blade Retaining Ring (72-31-13, 01-160) to the Bladed Disk Assembly

    1. Refer to Figure.

    2. NOTE

       You may ignore this step where the interference at the location 0103 is not tight.

       Increase the temperature of the front blade retaining ring to 176 deg F (80 deg C) in an air-circulating oven.

    3. Align and engage the three aligning holes in the front blade retaining ring with the three headless pins attached to the Stage 1 Fan Disk.

    4. Use the four pusher bolts (part of IAE 1J12141 Pusher bolt set 1 off) to push the front blade retaining ring to the mating face of the Stage 1 Fan Disk.

       1. Turn each pusher bolt to push equally the flange of the front blade retaining ring.

       2. Do this operation until each aligning hole in the front blade retaining ring engages correctly with the headless pins.

    5. Use a clean cloth, made moist with CoMat 01-124 ISOPROPYL ALCOHOL, to remove the temporary marks written on the outer surfaces of the annulus fillers.

    6. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 36 bolts (01-120).

    7. Remove the pusher bolts.

    8. Attach the front blade retaining ring to the Stage 1 Fan Disk with the 36 bolts.

    9. TORQUE the 36 bolts to between 180 lbfin and 220 lbfin (20.00 Nm and 25.00 Nm) in the sequence shown, refer to Figure.

    10. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads and mating faces of the 22 bolts (01-140).

    11. Attach the front blade retaining ring to the annulus fillers with the 22 bolts.

    12. TORQUE the 22 bolts to between 180 lbfin and 220 lbfin (20.00 Nm and 25.00 Nm) in the sequence given in the subsequent steps:

        1. Torque the first two bolts 180 degrees apart.

        2. Torque the second two bolts 90 degrees and 270 degrees apart from the first bolt.

        3. Do 180/90 degrees pattern and torque the remaining bolts.

        4. Do Step, Step and Step again to make sure that all the bolts are at the necessary torque of between 180 lbfin and 220 lbfin (20.00 Nm and 25.00 Nm).

    13. Make sure that there are no clearances between the annulus fillers and the front blade retaining ring.

14. SUBTASK 72-31-00-430-066 Put the Annulus Filler Rubber Seal in the Correct Position

    1. 

       CAUTION

       MAKE SURE THAT THE PLASTIC STRIP HAS A SMOOTH SURFACE AND EDGES. IF YOU USE A STRIP WITH A ROUGH SURFACE AND EDGES, DAMAGE TO THE RUBBER SEAL CAN OCCUR.

       MAKE SURE THAT YOU DO NOT BREAK THE PLASTIC STRIP AND LEAVE PIECES OF IT IN THE FAN. PIECES OF PLASTIC CAN CAUSE DAMAGE TO THE RUBBER SEAL.

       Refer to Figure.

    2. Use a stiff plastic strip with the dimensions that follow;

       - Length: 3.15 in. to 4.72 in. (80 mm to 120 mm).

       - Width: 1.58 in. to 2.36 in. (40 mm to 60 mm).

       - Thickness: 0.025 in. to 0.028 in. (0.64 mm to 0.71 mm).

    3. Push the stiff plastic strip between the annulus filler and the fan blade at the rear end.

       1. If you can push the stiff plastic strip easily, the rubber seal is in the correct position. Go to Step.

       2. If you can not push the stiff plastic strip easily, the rubber seal is possibly in an incorrect position. Go to Step.

    4. Push the rubber seal in to the correct position with the stiff plastic strip.

    5. 
       CAUTION
       DO NOT PUSH THE RUBBER SEAL, THAT IS IN INCORRECT POSITION, FORWARD WITH THE STIFF PLASTIC STRIP. THE STIFF PLASTIC STRIP CAN CAUSE DAMAGE TO THE RUBBER SEAL.

       Move the stiff plastic strip forward.

       1. If you can move the plastic strip easily, the rubber seal is in the correct position. Continue to move forward.

       2. If the movement becomes difficult, the rubber seal is in an incorrect position. Go to Step.

    6. Correct the position of the annulus filler rubber seal.

       1. Pull the stiff plastic strip out of the annulus filler.

       2. Push the rubber seal in inner direction with the stiff plastic strip to put the rubber seal in to the correct position.

    7. Do Step and Step until the stiff plastic strip goes to the front end of the fan blade.

15. SUBTASK 72-31-00-430-061 Install the LP Compressor (Fan) Module and the Balance Arbor Assembly to the Dynamic Balancing Machine

    1. Refer to Figure.

    2. Move the LP compressor (fan) module on the turnover stand to the work area. Set the module front side to the dynamic balancing machine drive. Move IAE 1J12309 Balance cover 1 off and IAE 1J12399 Handling sling 2 off to the work area.

    3. Release the bolts and adjust the distance between centerlines of the two pedestals of the balancing machine from 31 in. to 34 in. (788 mm to 863 mm).

    4. Put the balance cover between the two pedestals of the balancing machine.

    5. Remove the bolts, part of the balance cover, and remove the upper half of the balance cover with a hoist and put it near the work area.

    6. Install the two handling slings to the LP compressor (fan) module and the balance arbor assembly on the turnover stand.

    7. Attach two hoists to the slings.

    8. Tighten the hoists and release the clamps of the turnover stand.

    9. Lift and transfer the module to the balancing machine.

       1. Slowly lift the module until it is clear of the turnover stand.

       2. Move and lower the module to the balancing machine.

       3. Very slowly lower the module when the fan blade tips are adjacent to the balancing machine and the balance cover.

       4. Adjust the lower half of the balance cover and the pedestals of the balancing machine to make the sufficient clearance to the module.

       5. NOTE

          Do this operation with two persons. One person operates the hoists and the other person adjusts the balance cover and the pedestals.

          The balancing tools in this TASK are applicable to a Schenck HL-5U dynamic balancing machine with the extended pedestals and the two V rollers.

          The machine must be operated at a speed between 600 rpm to 800 rpm to agree with the gear ratios available. The direction of the turn is clockwise when you look from the rear of the engine.

          Set the module on the two V rollers, parts of the balancing machine.

    10. Move the pedestals, the module and the lower half of the balance cover to the balancing machine drive shaft.

    11. Connect the arbor to the balancing machine drive shaft with the five bolts, part of the balancing machine. The blade at the No. 1 position must align with the zero position on the protractor of the balancing machine as near as possible.

    12. Safety the pedestals and the lower half of the balance cover to the balancing machine with the bolts, part of the balancing machine.

16. SUBTASK 72-31-00-430-062 Do the LP Compressor (Fan) Module Run-out Check

    1. Refer to Figure.

    2. Set a dial indicator to the balancing machine with a magnet base.

    3. Turn the protractor of the balancing machine manually and turn the module to check the run-out.

    4. Check the run-out with the dial indicator at the location shown, refer to Figure. The run-out must be in the subsequent limits.

       1. Location Diameter A - Total indication value 0.005 in. (0.127 mm).

       2. Location Face B - Total indication value 0.005 in. (0.127 mm).

    5. If the run-out is more than the limits, reject the module and do more inspection to find the cause.

    6. Remove the dial indicator and the magnet base.

    7. Input geometrical setting values to the balancing machine.

       1. The trim balance weight is installed on to the front blade retaining ring.

       2. The fan rear balance weight is installed on to the rear blade retaining ring.

17. SUBTASK 72-31-00-430-063 Balance the LP Compressor Module

    1. Refer to Figure and Figure.

    2. Attach the top half of the balance cover with the bolts.

    3. Measure and record the magnitude and angle of the unbalance in each plane.

       1. Start the balance machine.

       2. Make sure that the module turns clockwise when you look from the rear of the engine.

       3. Slowly increase the speed to the measuring speed. The measuring speed of the module must be between 600 rpm and 800 rpm.

       4. Keep the speed until the unbalance indication become stable.

          1. Measure the unbalance indications four times in a short time.

          2. Make sure that the differences between the four indications are within 0.5 oz in (360 gm mm) radius circle on each plane.

       5. When the four unbalance indications are in a 0.5 oz in (360 gm mm) radius circle, take the average of the vector of the four indications.

    4. Before any unbalance correction, make sure that four subsequent unbalance indications are in the limit.

       1. Static unbalance.

          1. If the static unbalance is not more than 24.3 oz in (17500 gm mm), go to the Step to check the couple unbalance.

          2. If the static unbalance is more than 24.3 oz in (17500 gm mm), reject the module and do more inspection to find the cause.

       2. Couple unbalance.

          1. If the couple unbalance is not more than 140 oz sqin (2560000 gm sqmm), go to the Step to correct unbalance.

          2. If the couple unbalance is more than 140 oz sqin (2560000 gm sqmm), reject the module and do more inspection to find the cause.

    5. Correct the static unbalance in 0.89 oz in (640 gm mm) and the couple unbalance in 4.2 oz sqin (76000 gm sqmm). Unbalance correction procedure is given in the subsequent steps.

       1. Record the angle and the quantity of the unbalance on the front and rear planes.

       2. Remove the two bolts and the end plate, part of the balance cover, on the front face of the balance cover.

       3. Remove the bolts on the front blade retaining ring at the angle.

       4. Do the selection of the correct trim balance weight and install it on the front blade retaining ring with the bolt.

       5. Torque the bolt to 85 lbfin to 105 lbfin (10.00 Nm to 12.00 Nm).

       6. Install the end plate on the front face of the balance cover with the two bolts.

       7. Release the two clamps, part of the balance cover, and open the door, part of the balance cover, on the rear face of the balance cover.

       8. Remove the bolt on the rear blade retaining ring at the angle.

       9. Do the selection of the correct fan rear balance weight and install it on the rear blade retaining ring with the bolt.

       10. Torque the bolt to 180 lbfin to 220 lbfin (20.00 Nm to 25.00 Nm).

       11. Close the door and safety the clamps.

18. SUBTASK 72-31-00-430-064 Remove the LP Compressor (Fan) Module and the Balance Arbor from the Balance Machine

    1. Refer to Figure.

    2. Remove the bolts and remove the upper half of the balance cover with a hoist.

    3. Remove the bolts and disconnect the balance arbor from the balancing machine.

    4. Remove the bolts and disconnect the lower half of the balance cover from the balancing machine.

    5. Release the bolts of the pedestals.

    6. Move the pedestals, the module and the lower half of the balance cover apart from the balancing machine drive shaft.

    7. Install IAE 1J12399 Handling sling 2 off to the balance arbor.

    8. Attach the two hoists to the handling slings.

    9. Slowly lift the module until it is clear of the lower half of the balance cover.

    10. Slowly lower the module and attach on to the turnover stand and safety with the two clamps.

    11. Remove the hoists.

    12. Remove the handling slings.

    13. Install the upper half of the balance cover with the bolts and remove the balance cover from the balancing machine.

19. SUBTASK 72-31-00-430-065 Remove the Balance Arbor from the LP Compressor (Fan) Module

    1. Refer to Figure and Figure.

    2. Move IAE 1J12101 Vertical sling 1 off, IAE 1J12181 Protection cover 1 off and IAE 1J12110 Transportation and storage stand 1 off to the work area.

    3. Turn the module vertically to the front end up on the turnover stand.

    4. Install the vertical sling on to the outer flange of the front blade retaining ring with the six bolts, part of the vertical sling.

    5. Attach a hoist to the sling.

    6. Remove the 24 bolts on the curvic coupling flange and disconnect the module from the balance arbor.

    7. Slowly lift the LP compressor module until it is clear of the balance arbor.

    8. Remove the six bolts and remove a set of the retaining plates from the curvic flange of the module.

    9. Install the protection cover to the curvic teeth with the three bolts and the three plain washers, part of the protection cover.

    10. Slowly lower the module on to the transportation and storage stand.

    11. Remove the six bolts on the outer flange of the front blade retaining ring and remove the vertical sling.

    12. Safety the module with the clamp and the wing nut, part of the transportation and storage stand.

Figure: Locations for the Fits and Clearances

Locations for the Fits and Clearances



Figure: Sectional View of the LP Compressor (Fan) Module

Sectional View of the LP Compressor (Fan) Module



Figure: Install the Vertical Sling on to the Stage 1 Fan Disk

Install the Vertical Sling on to the Stage 1 Fan Disk



Figure: The Stage 1 Fan Disk and the Rear Blade Retaining Ring - Correlation

The Stage 1 Fan Disk and the Rear Blade Retaining Ring - Correlation



Figure: The Rear Blade Retaining Ring Torque Tightening Sequence Diagram

The Rear Blade Retaining Ring Torque Tightening Sequence Diagram



Figure: Attach the Balance Arbor and Handling Sling to the Stage 1 Fan Disk

Attach the Balance Arbor and Handling Sling to the Stage 1 Fan Disk



Figure: The Torque Tightening Sequence for the Curvic Coupling Bolts

The Torque Tightening Sequence for the Curvic Coupling Bolts



Figure: Install the Stage 1 Fan Disk and Balance Arbor to the Turnover Stand

Install the Stage 1 Fan Disk and Balance Arbor to the Turnover Stand



Figure: Moment Weigh LP Compressor Rotor Blade

Moment Weigh LP Compressor Rotor Blade



Figure: Moment Weight Values Marked on the Fan Blade

Moment Weight Values Marked on the Fan Blade



Figure: The Sequence Diagram to Install the Annulus Fillers

The Sequence Diagram to Install the Annulus Fillers



Figure: The Annulus Filler and the Front Blade Retaining Ring Installation

The Annulus Filler and the Front Blade Retaining Ring Installation



Figure: Front Blade Retaining Ring Torque Tightening Sequence Diagram

Front Blade Retaining Ring Torque Tightening Sequence Diagram



Figure: Position of the Annulus Filler Rubber Seal

Position of the Annulus Filler Rubber Seal



Figure: Install/Remove the LP Compressor (Fan) Module to Balancing Machine

Install/Remove the LP Compressor (Fan) Module to Balancing Machine



Figure: Set up for Runout Checks and Dynamic Balancing Bladed Disk

Set up for Runout Checks and Dynamic Balancing Bladed Disk



Figure: Install the LP Compressor (Fan) Module to the Storage Stand

Install the LP Compressor (Fan) Module to the Storage Stand



Figure: Install the Protection Cover

Install the Protection Cover



Figure: Apply Lubricant to the Chocking Pads of the Blade

Apply Lubricant to the Chocking Pads of the Blade



Figure: Apply Lubricant to the Slot Faces and the Rear Ramps of the Stage 1 Fan Disk

Apply Lubricant to the Slot Faces and the Rear Ramps of the Stage 1 Fan Disk



Figure: Balance Weight

Balance Weight



Figure: Install the Stage 1 Fan Blades in to the Stage 1 Fan Disk Assembly

Sheet 1



Legend

Install the Stage 1 Fan Blades in to the Stage 1 Fan Disk Assembly

Sheet 1

Close

Figure: Install the Stage 1 Fan Blades in to the Stage 1 Fan Disk Assembly

Sheet 2



Legend

Install the Stage 1 Fan Blades in to the Stage 1 Fan Disk Assembly

Sheet 2

Close