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 C.  To remove the front fan case, you must remove the inlet cowl, the inlet cone, the fan blades, the Electronic Engine Control (EEC), and the Supplemental Control Unit (SCU).
 TASK 72-33-01-004-001-N00
 2.  Remove the Front Fan Case
_________________________
 A.  Special Tools and Equipment
 (1)  
PWA 85677 - Handling Bracket, Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108

 B.  
Standard Tools and Equipment

 (1)  
Hoist - Code 2504, 1 ton capacity, 28 foot lift, standard hand chain with safty hooks, C & M Hoist Division Columbus McKinnon Corp., Tonawanda, NY 14150, or equivalent

 (2)  
Mallet - Fiber, for front fan case removal

 C.  
References

 (1)  
AMM 71-11-01/401, Inlet Cowl

 (2)  
AMM 71-11-04/201, Fan Cowl Panels

 (3)  
AMM 72-31-02/401, 1st-Stage (Fan) Blade

 (4)  
AMM 73-21-04/401, Electronic Engine Control (EEC)

 (5)  
AMM 73-21-15/401, Supplemental Control Unit (SCU)

 (6)  
AMM 77-31-01/401, Engine Accelerometer

 (7)  
AIPC 71-00-50 Fig. 1, AIPC 71-53-00 Fig. 3, AIPC 72-33-51 Fig. 5, AIPC 72-33-52 Fig. 5, AIPC 73-21-40 Fig. 1, AIPC 73-21-40 Fig. 4, AIPC 77-31-55 Fig. 1

 D.  
Access

 (1)  
Location Zone
 412 Engine 1 - Front Fan Case
 422 Engine 2 - Front Fan Case
 432 Engine 3 - Front Fan Case
 442 Engine 4 - Front Fan Case

 (2)  
Access Panel
 413 and 414 Fan Cowl Panels - Engine 1
 423 and 424 Fan Cowl Panels - Engine 2
 433 and 434 Fan Cowl Panels - Engine 3
 443 and 444 Fan Cowl Panels - Engine 4

 E.  
Fan Case Wiring, Tube, and Hose Removal (Fig. 401).

 (1)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 014-002-N00
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 72-33-01
 ALL  ú ú N02 Page 401 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
FLANGE B
3. EEC PAMB FLEX
FLANGE B1 HOSE (UPPER) FLANGE A1
10.
BRACKET

11.
BRACKET

4
SEE  A  SEE  B  11A. BRACKET SEE M  10A. BRACKET SEE O 
FLANGE A 

7. EEC PAMB MANIFOLD 12. BRACKET
SEE L
48. BRACKET 3 FLEX HOSE
9. EEC PAMB SEE G
(LOWER)
39. BRACKET FLEX HOSE
8. EEC PT2 SEE F
1
13. BRACKET13. BRACKET SEE HSEE D
40. EEC PAMB FLEX HOSE
13. BRACKET (FRONT)
9. EEC PAMB SEE K TEE HOSEFLEX HOSE 41. BRACKETNUT
14. BRACKET39. BRACKET
47. BRACKET SEE I
SEE F SEE E
A
46. BRACKET
SEE J 2 HOSE NUT
TEEEEC PT2 TUBE
1  ENGINES PRE-PW-SB 72-191
2  ENGINES POST-PW-SB 72-191
3  ENGINES POST-PW-SB 73-101
4  10. ENGINES PRE-PW-SB 72-332 L-A3038 10A. ENGINES POST-PW-SB 72-332 1189
Front Fan Case Wiring, Tube and Hose Installation Figure 401 (Sheet 1)
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 72-33-01
 ALL  ú ú N01 Page 402 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE C
32. BRACKET
FLANGE A1
FLANGE A FLANGE B
26.  BOLT (2 LOCATIONS)FLANGE B1
25. MOUNTING PAD
4.
 SCREW

5.
 WASHER

27. BRACKET 6. NUT
WIRE BUNDLE
W3502
10. OR 10A. BRACKET  4 
SEE  O  27. BRACKET 
WIRE BUNDLE 
FLANGE B1  W3504 
BRACKET 
38. BRACKET 
6. NUT 
37. BRACKET  12 O'CLOCK 
SEE  N  POSITION 
4. SCREW  WIRE 
B  5. WASHER  BUNDLE 
6. NUT 
27. BRACKET 
FLANGE A1 

INTERPHONE WIRE HARNESS
FLANGE B
　
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