73-21-04
 ALL  ú ú N01 Page 411 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ELECTRONIC ENGINE CONTROL - INSPECTION/CHECK
____________________________________________
 1.  General
_______
 A.  This procedure removes the water from the water traps for the pressure manifold of the Electronic Engine Control (EEC).
 B.  There are four water traps for the EEC pressure manifold. The water traps are installed below the EEC on the fan case at approximately the 3 o'clock position.
 C.  You can get access to the water traps through the right fan cowl panel.
 TASK 73-21-04-206-001-N00
 2.  Do a Check of the Water Traps for the EEC Pressure Manifold (Fig. 601)
___________________________________________________________
 A.  Equipment
 (1)  
Container - 1 pint (0.5 liter) capacity to collect the water

 (2)  
M303, M305, or M307 Bergen Mechanical Crimper
 Bergen Cable Technologies Inc
 170 Gregg St

 P.O.
 Box 1300
 Lodi, NJ 07644-9982

 B.  
Consumable Materials

 (1)  
G02334 Lockwire - AS3214-02

 (2)  
G02332 Ferrule - P05-292 (Optional)

 (3)  
G02335 Cable - Safety - P05-291 (Optional)

 (4)  
B00130 Alcohol - Isopropyl (PMC 9094) - P11-014

 C.  
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 D.  
Access

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

 (2)  
Access Panel
 414 Right Fan Cowl Panel - Engine 1
 424 Right Fan Cowl Panel - Engine 2
 434 Right Fan Cowl Panel - Engine 3
 434 Right Fan Cowl Panel - Engine 4

 E.  
Prepare to do the check of the water traps

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

 S 016-002-N00
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 73-21-04
 ALL  ú ú N01 Page 601 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
ELECTRONIC ENGINE SEE A
CONTROL (EEC)
P5 MANIFOLD WATER TRAP  TEE  FAN CASE TEE 
PB MANIFOLD WATER TRAP  WATER TRAP PAMB MANIFOLD 

WATER TRAP TEE PT2 MANIFOLD 
(SCU) (REF) CONTROL UNIT SUPPLEMENTAL 
FWD 
A 
Figure 601 EEC Water Trap Check 

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 73-21-04
 ALL  ú ú N04 Page 602 ú Jun 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
F.  Procedure
 S 216-003-N00
 (1)  
Examine the water trap for the PB manifold.

 (a)  
Remove lockwire and cap.

 (b)  
Make an inspection of the PB water trap as follows: 1) Remove any water from the water trap. 2) Clean the water trap vent hole.

 a)  Clean the vent hole in the condensation trap with a
 0.010 - 0.015 inch (0.254 - 0.381 mm) diameter steel wire.
 b)  Clean the side walls of the trap with a rough cylindrical bristle brush (with strong fibers such as natural, nylon, polyster or tampico) that will not scratch the trap interior.
 NOTE: Do not use ferrous material type brushes.
____ Use a stainless steel brush only.
 c)  Clean the bottom of the trap with a stainless steel brush (such as Dremmel #532) and Isopropyl Alcohol or equivalent.
 d)  After you clean the bottom of the trap, check the inside of the trap and the bleed hole to makke sure it is free of loose material, fluid, soot or scale deposites. A 0.010 -0.015 inch (0.254 - 0.381 mm) diameter steel wire or drill bit must be able to easily pass through the bleed hole without collecting or dislodging debris. Do this procedure again, as necessary.
　
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