(e)  
The blade at the 12 o'clock position will then be free to move fully out of the slot.

 (f)  
Turn the cutout in the fixture until it aligns with the blade that you will remove at the 12 o'clock position.

 S 024-080-N00
 (2)  
If you will replace a matched moment set of blades, do the steps that follow:

 (a)  
Put the opposite fan blade at the 12 o'clock position.

 (b)  
Align the cutout with the blade you will remove.

 (c)  
Remove the fan blade that is 180 degrees from the first fan blade you removed.

 TASK 72-31-02-004-007-N00
 3. Fan Blade Removal (Full Set) (Fig. 401)
____________________________
 A. General
 (1)  
This procedure is for maintenance tasks.

 B.
Special Tools and Equipment

 (1)  
PWA 85035 - Support Fixture, Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108

 (2)  
PWA 86651 - Storage Cart, Pratt & Whitney

 C.
Standard Tools and Equipment

 (1)  
Mat - Protective, rubber Manufacturer's Association, Grade SC43, neoprene sponge, 1 inch thick, approximately 5 x 6 feet with warning streamers attached (3 required)

 (2)  
Pin Punch - locally available

 (3)  
Gloves - locally available

 D.
Consumable Materials

 (1)  
G00758 Pen - Marking, Cado Marker

 E.
References

 (1)  
AMM 72-31-01/401, Inlet Cone

 (2)  
IPC 72-31-02 Fig. 5

 F.
Access

 (1)  
Location Zone
 412 Engine 1 - LPC Hub
 422 Engine 2 - LPC Hub
 432 Engine 3 - LPC Hub
 442 Engine 4 - LPC Hub

 G.
Procedure

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-31-02
 ALL  ú ú N01 Page 405 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 494-081-N00
 CAUTION: MAKE SURE THAT YOU PUT COVERS ON ALL OF THE LOWER HALF OF THE
_______ INLET COWL SURFACE. ALSO MAKE SURE THAT THE EDGES OF THE MATS TOUCH OR ARE ATTACHED WITH SOME TAPE. IF THE EDGES ARE NOT, THEN THE TOOLS OR PARTS CAN FALL AND CAUSE DAMAGE TO THE INLET COWL SURFACE.
 (1)
Put the protective mats on the inner lower half of the inlet cowl.

 S 014-082-N00

 (2)  
Remove the inlet cone (AMM 72-31-01/401).

 S 014-083-N00
 WARNING:_______ALWAYS WEAR GLOVES WHEN YOU TOUCH THE FAN BLADES. THE FAN BLADES ARE SHARP AND CAN CAUSE INJURY TO YOUR HANDS.
 CAUTION: MAKE SURE YOU INSTALL THE BLADE LOCK IF YOU MUST GO AWAY FROM
_______ THE ENGINE. IF THERE IS ENGINE WINDMILLING WHEN THE FAN BLADES ARE IN THE FORWARD POSITION, THE BLADES CAN BECOME DAMAGED.
 (3)  
Use a small pin punch, in the hole that is near the lock joint, to remove the fan blade lock (1) (Fig. 401, sheet 1).

 S 494-084-N00

 (4)  
Install the (PWA 85035) support fixture to the front LPC hub.

 (a)  
Attach the (PWA 85035) support fixture to the front LPC hub with the bolts (Fig. 401, sheet 2).

 S 014-085-N00
 (5)  
Align the cutout with the blade you will remove (Fig. 401, sheet 2).

 H.
Remove the Full Set of Fan Blades (Fig. 401).

 S 934-107-N00
 (1)  
Do the steps that follow to make a record of the fan blade sequence.

 (a)  
With a marking pen, write the number 1 on the fan blade and the adjacent hub slot.

 (b)  
Go clockwise, as seen from the front, to the adjacent fan blade.

 (c)  
Continue to write the numbers until all 38 of the fan blades have numbers.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-31-02
 ALL  ú ú N01 Page 406 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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