C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
72-21-00-000-006 Removal of the Spinner Rear Cone
72-21-00-400-005 Installation of the Spinner Front Cone
72-21-00-991-300 Fig. 401
72-21-00-991-301 Fig. 402
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3. Job Set-up
__________ Subtask 72-21-00-860-055
A. Aircraft Maintenance Configuration
(1) Make sure that the access platform is in position.
(2) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
4. Procedure
_________ (Ref. Fig. 401/TASK 72-21-00-991-300, 402/TASK 72-21-00-991-301) Subtask 72-21-00-480-058
A. Install guide pins as follows:
(1) Apply a thin layer of engine oil (Material No. CP2442) to the 3 PIN, GUIDE - SPINNER REAR CONE (856A3409G01).
(2) Install the 3 guide pins, equally spaced, on the forward flange of the fan disk. Install one of the pins in the offset hole of the flange.
Subtask 72-21-00-420-067
B. Install the spinner rear cone as follows:
(1) Apply a thin layer of graphite grease (Material No. CP2101) to the threads of the bolts (30).
(2) Safety precautions WARNING : USE HEAT INSULATED GLOVES WHEN YOU TOUCH CHILLED OR HOTS
_______
PARTS TO PREVENT INJURY
(a) Increase the temperature of the aft flange of spinner rear cone
(20) to 60 deg.C (140.00 deg.F) with a heat gun.
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Post Installation checks of the Spinner Rear Cone
Figure 402/TASK 72-21-00-991-301
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(3) Install the spinner rear cone.
CAUTION : TAKE CARE NOT TO LET THE SPINNER REAR CONE FALL WHEN YOU
_______ INSTALL IT ON THE FAN DISK. DAMAGE TO THE CONE COULD RESULT.
(a) Install the spinner rear cone on the fan disk forward flange as follows:
1 Align the offset holes
_ NOTE : The offset hole in the spinner rear cone is identified
____ by a spherical indentation on its rear flange.
2 Install three equally-spaced bolts (30) and washers (10) and
_ tighten them until the rear cone comes fully against the forward flange of fan disk. While you do this, make sure that the lip of the rear cone seal engages correctly under the front edge of the fan blade platforms.
(4) Let the assembly return to ambient temperature. Then remove the 3 guide pins PIN, GUIDE - SPINNER REAR CONE (856A3409G01).
(5) Install the remaining bolts (30) and washers (10).
(6) TORQUE all the bolts (30) to between 110 and 120 lbf.in (1.24 and
1.35 m.daN).
Subtask 72-21-00-220-056
C. Do a check of the spinner rear cone to fan disk for correct installation as follows: (Ref. Fig. 402/TASK 72-21-00-991-301)
(1) Make a check of the Gap F34 over 360 degrees with a feeler gage set.
NOTE : The gap F34 is the blueprint clearance, or gap, between the
____ aft edge of the spinner rear cone and the front edge of the fan blade platforms after installation.
(a) The gap F34 must measure between: (0.020 in. (0.5 mm) to 0.051 in. (1.3 mm)
(b) If this gap F34 is out of limits at any location of the circumference, remove the rear cone (Ref. TASK 72-21-00-000-006) find the cause (see the NOTE) and correct it.
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E 56-5B E E E NOTE : The cause might be a mis-installed blade on the fan disk,
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