79-32-00
 ALL  ú ú N01 Page 501 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
B. Access
 (1)  
Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 C.
Preconditions

 S 865-028-N00
 (1)  
These conditions are necessary for this task:

 (a)  
Engines in operation (AMM 71-00-00/201).

 D.
Do a Test of the Indicating System for the Oil Pressure

 S 865-002-N00
 (1)
Make sure these circuit breakers that follow are closed:

 (a)  
P6 Main Power Distribution Panel
 1) 6D1 OIL PRESS ENG 1
 2) 6D2 OIL PRESS ENG 2
 3) 6D3 OIL PRESS ENG 3
 4) 6D4 OIL PRESS ENG 4

 (b)  
P7 Overhead Circuit Breaker Panel
 1) 7F9 EIU L
 2) 7F10 EIU C
 3) 7F15 EIU R

 S 715-003-N00
 (2)  With the two engines in operation at the same power, make sure the oil pressure indication on the auxiliary EICAS display is approximately the same for each engine.
 TASK 79-32-00-715-026-N00
 3. System Test - Oil Pressure Indicating System
____________________________________________
 A. Standard Tools and Equipment
 (1)  
Air source - Compressed Dry Filtered, 0-100 psi
 (0-667 kPa)

 (2)  
Valve - Shutoff

 (3)  
Valve - Vent

 (4)  
Gauge - Pressure, 0-100 psi (0-667 kPa) range,
 1% accuracy

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-32-00
 ALL  ú ú N01 Page 502 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE  A  OIL PRESSURE TRANSMITTER, T679  ELBOW  TUBE NUT  OIL PRESSURE TUBE 
A  OIL PRESSURE TRANSMITTER, T679 

VENT
TUBE

FWD
A
INTERMEDIATE CASE (REF)  LOW OIL PRESSURE WARNING SWITCH (REF) 
ENGINES WITHOUT SB 79-2036  FWD  A-A 
A 

Oil Pressure Transmitter Location
Figure 502 (Sheet 1)

E18730
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 79-32-00
 ALL  ú ú N01 Page 503 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
B  ELBOW 
TUBE NUT 
OIL 
OIL PRESSURE  PRESSURE 
TRANSMITTER  TUBE 
OIL PRESSURE 
TRANSMITTER 
B 
LOW OIL 
PRESSURE 
WARNING 
SWITCH 
VENT TUBE 
FWD 
B-B 

FWD
ENGINES WITH SB 79-2036 A
Oil Pressure Transmitter Location Figure 502 (Sheet 2)
E18739
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 79-32-00
 ALL  ú ú N02 Page 504 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2)
AMM 31-61-00/501, Integrated Display System

 (3)
AMM 71-11-04/201, Fan Cowl Panels

 (4)
AMM 71-11-06/201, Core Cowl Panels

 (5)
AMM 78-31-00/201, Thrust Reverser System

 (6)
WDM 79-32-11

 (7)
WDM 79-32-12

 (8)
SSM 79-00-01

 C.
Access

 (1)  
Location Zone 221 Control Cabin, LH 222 Control Cabin, RH 412 Engine 1 - Forward HPC Case 10 o'clock 422 Engine 2 - Forward HPC Case 10 o'clock 432 Engine 3 - Forward HPC Case 10 o'clock 442 Engine 4 - Forward HPC Case 10 o'clock
　
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