R 72-21-00-300-028 Replacement of Fan Rotor Blades in Pairs 72-21-00-320-003 Blending of Fan Rotor Blades 72-21-00-400-007 Installation of the Fan Rotor Blades 72-23-00-210-003 Detailed Inspection of Engine Inlet, Fan Blades, Fan
Outlet and Abradable Material
72-21-00-991-314 Fig. 606
72-21-00-991-315 Fig. 607
3. Job Set-up
__________
Subtask 72-21-00-941-087
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.
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R (2) Make sure that the engine 1(2) shutdown occurred not less than 5 R minutes before you do this procedure.
R (3) On the overhead maintenance panel 50VU:
R (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) R pushbutton switch is off.
R (b) Put a warning notice to tell persons not to energize the FADEC R 1(2).
R (c) Put the access platform in position.
R 4. Procedure
_________
R (Ref. Fig. 606/TASK 72-21-00-991-314, 607/TASK 72-21-00-991-315)
R Subtask 72-21-00-210-059
R A. Inspection of the fan blades (in situ, installed on the fan disk)
R -------------------------------------------------------------------------------R INSPECT/CHECK MAXIMUM REMARKS R SERVICEABLE LIMITS R -------------------------------------------------------------------------------
R 1. Fan rotor blades for: Not serviceable. Replace pair of matched
R A. Cracks or Tears. blades (Ref. TASK 72-21-
R (1) Operational 00-300-028).
R cracks.
R (2) FOD caused Not serviceable Replace blade (Ref. TASK
R cracks or 72-21-00-000-007) and
R tears. (Ref. TASK 72-21-00-400-
R 007), or blend the defects
R (Ref. TASK 72-21-00-320-
R 003) if damage is within
R the blending limit of
R figure.
R (Ref. Fig. 606/TASK 72-21-
00-991-314)
R Blended fan blades must be
R repaired following ESM
R 72-21-01 Rep 01 at first
R shop visit opportunity.
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R Fan Rotor Blades - Blend Limits Figure 606/TASK 72-21-00-991-314- 13 (SHEET 1)
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R Fan Rotor Blades - Blend Limits Figure 606/TASK 72-21-00-991-314- 23 (SHEET 2)
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R Fan Rotor Blades - Blend Limits Figure 606/TASK 72-21-00-991-314- 33 (SHEET 3)
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R R Fan Rotor Blades - Local Distortions Figure 607/TASK 72-21-00-991-315- 14 (SHEET 1)
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R R Fan Rotor Blades - Local Distortions Figure 607/TASK 72-21-00-991-315- 24 (SHEET 2)
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