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 midspan shroud.
 U. Fretting on:
 (1) Aft side of  No limit if not deeper  Replace pair of blades
 shank.  than 0.003 in. (0.08  (Ref. TASK 72-21-00-300-
mm).  028).
 (2) Lateral sides  No limit if not deeper  Replace pair of blades
 of shank  than 0.012 in. (0.30 mm)  (Ref. TASK 72-21-00-300-
(concave side) and 0.008  028).
 in. (0.20 mm) (convex
 side) on the area
 referenced by X for
 length and Y for width.
 (3) Forward face  No limit if not deeper  Replace pair of blades
 of dovetail.  than 0.003 in. (0.08  (Ref. TASK 72-21-00-300-
mm).  028).

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(4) Slide edges of No limit if not deeper Replace pair of blades
 platform.  than 0.013 in. (0.33 (Ref. TASK 72-21-00-300-mm). 028).
 V. Shingled midspan Not serviceable. See limit extensions
 shrouds.  (Ref. TASK 72-00-00-200-025).
 W. Fan blade(s) tip  Not serviceable. Release the blade(s) with seizure in fan hand force to move the case abradable seized blade(s) tip shroud. forward and
 circumferentially. Then, do an inspection of the blade(s) and abradable shroud for serviceability. Make sure that there is free N1 rotation.
 5. Close-up
________
 Subtask 72-21-00-942-075

 A. Put the aircraft back to its initial configuration.
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Remove the warning notice(s).

 (3) Remove the access platform(s).

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 TASK 72-21-00-210-007
 Inspection/Check of the Stage 1 Booster Vane, Fan Disk and Fan Blades Spacers.

 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________

 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
72-00-00-200-025 Over-Serviceable-Limit Extensions 72-21-00-000-007 Removal of the Fan Rotor Blades 72-21-00-000-008 Removal of the Stage 1 Booster Vane Assembly 72-21-00-400-007 Installation of the Fan Rotor Blades 72-21-00-400-008 Installation of the Stage 1 Booster Vane Assembly 72-21-00-991-317 Fig. 608 72-21-00-991-318 Fig. 609 72-21-00-991-319 Fig. 610
 3. Job Set-up
__________ Subtask 72-21-00-941-081
 A. Safety Precautions

 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice to tell persons not to start the engine.

 (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.

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 (3) On the overhead maintenance panel 50VU:

 (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).

 Subtask 72-21-00-020-073

 B. Remove the fan blades (Ref. TASK 72-21-00-000-007).
 4. Procedure
_________

 (Ref. Fig. 608/TASK 72-21-00-991-317, 609/TASK 72-21-00-991-318, 610/TASK 72-21-00-991-319)
 Subtask 72-21-00-210-057

 A. Do this visual inspection:
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1. Stage 1 booster vanes for: (Ref. Fig. 610/TASK 72-21-00-991-319)
　
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