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R TASK 72-21-00-300-029
R Replacement of Individual Fan Blades
R 1. Reason for the Job
__________________
R Self Explanatory
R 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION
R -------------------------------------------------------------------------------
R No specific warning notice
R No specific access platform 0.5 m (1 ft. 8 in.)
R No specific Torque Wrench : range 36.00 to 220.00 lbf.in
R (0.40 to 2.60 m.daN)
R B. Consumable Materials
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R Material No. CP2101 *
R graphite grease (Ref. 70-30-00)
R C. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 71-00-00-710-009
R 71-00-00-750-001
R 72-21-00-000-005
R 72-21-00-000-006
R 72-21-00-000-007
R 72-21-00-400-005
R 72-21-00-400-006
R 72-21-00-400-007
R 72-21-00-991-341
R 72-21-00-991-344
R 72-21-00-991-345
F EEFF : ALL E E ECES Vibration Check Fan Trim Balance - 1 sensor 3 speed Removal of the Spinner Front Cone Removal of the Spinner Rear Cone Removal of the Fan Rotor Blades Installation of the Spinner Front Cone Installation of the Spinner Rear Cone Installation of the Fan Rotor Blades Fig. 407 Fig. 410 Fig. 411
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R 72-21-00-991-346 Fig. 412
R 3. Job Set-up__________
R Subtask 72-21-00-941-086
R A. Safety Precautions
R (1) On the center pedestal, on the ENG panel 115VU:
R (a) Put a warning notice to tell persons not to start the engine.
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 (4) Put an access platform in position.
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R 4. Procedure
_________
R (Ref. Fig. 407/TASK 72-21-00-991-341, 410/TASK 72-21-00-991-344, 411/TASK R 72-21-00-991-345, 412/TASK 72-21-00-991-346)
R Subtask 72-21-00-020-076
R A. Record moment weight of blades.
R CAUTION : DO NOT MIX OLD FAN BLADES AND NEW RECAMBERED FAN BLADES ON A
_______ R SAME FAN DISK.
R NOTE : If pairs of fan blades are not available as spare, you can replace
____ R one blade individually when the difference between the moment R weight of the blade removed and its opposite is not greater than R 800 cm.g (315 in.g). However the inspections and corrections given R below must be done before and after the fan blade installation to R make sure the engine imbalance is not more than the limits. This R will also optimize the engine operation. Two conditions can exist, R refer to the logic dynamic. R (Ref. Fig. 412/TASK 72-21-00-991-346)
R NOTE : In all cases of individual blade replacement, remove its opposite
____ R to record the moment weight of the opposite blade.
R NOTE : In all cases of fan blades replacement a vibration survey is
____ R (Ref. TASK 71-00-00-710-009) necessary. Results from the vibration R survey will determine if the trim balance is necessary (Ref. TASK R 71-00-00-750-001).
R (1) Put a rubber mat in the air intake cowl.
R (2) Remove the spinner front cone (Ref. TASK 72-21-00-000-005).
R (3) Remove the spinner rear cone (Ref. TASK 72-21-00-000-006).
R (4) Record moment weight of removed blade.
R (5) Remove fan blade (Ref. TASK 72-21-00-000-007)
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