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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
TEST NO. 13 - ENGINE MAIN OIL PRESSURE
______________________________________
 (6)  S 975-159-N00Make a record of the N2 and OIL P indications shown on the auxiliary EICAS.
 (7)  S 865-161-N00Slowly move the thrust lever forward to the 1.4 EPR position. (a) Let the engine become stable for 15-20 seconds.
 (8)  S 975-160-N00Make a record of the N2 and OIL P indication shown on the auxiliary EICAS.
 (9)  S 865-162-N00Slowly move the thrust lever rearward to the minimum idle position. (a) Operate the engine for 5 minutes to decrease the engine temperature.
 S 865-163-N00

 (10)
 Use the Power Plant Operation (Normal) procedure to do the engine shutdown (AMM 71-00-00/201).

 S 285-164-N00

 (11)
 Make sure the indications for the main oil pressure are in the permitted limits (Fig. 511).

 S 815-165-N00

 (12)
 If the indications are not in the permitted limits, do the steps that follow:

 (a)  
Examine the type of the metering tube nipple which is installed.

 (b)  
ON ENGINES WITHOUT PW SB 72-114; find the new type of metering tube nipple (Fig. 512, Sheet 1 and Table 505).

 (c)  
ON ENGINES WITH PW SB 72-114; find the new type of the metering tube nipple (Fig. 512, Sheet 2 and Table 505).

 (d)  
Open the left fan cowl panel (AMM 71-11-04/201).

 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ACCEPTANCE BAND FOR THE MAIN OIL PRESSURE

5600  6000  6400  6800  7200  7600  8000  8400  8800  9200  9600  10000  10400  10800  11200 
HIGH ROTOR SPEED - N2 (RPM) 
56.5  60.6  64.6  68.6  72.7  76.7  80.8  84.8  88.8  92.9  96.9  101.1  105.0  109.0  113.1 
HIGH ROTOR SPEED - N2 (%RPM) 

ENGINES WITHOUT PW SB 75-95  L-A4357(1091)
Main Oil Pressure Limits Figure 511 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
MAIN OIL PRESSURE PSI (KPA) DIFFENENTIAL

ACCEPTANCE BAND FOR THE MAIN OIL PRESSURE
360

(2482.1)
320
280
240
200
160
120
80
40
0
(2206.3)
(1930.5)
(1654.7)
(1379.0)
(1103.2)
(827.4)
(551.6)
(275.8)

HIGH ROTOR SPEED - N2 (RPM)

56.5 60.6 64.6 68.6 72.7 76.7 80.8 84.8 88.8 92.9 96.9 101.1 105.0 109.0 113.1
HIGH ROTOR SPEED - N2 (%RPM)

L-A7737(0000)V
ENGINES WITH PW SB 75-95
C47596
Main Oil Pressure Limits
figure 511 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
CHANGE IN THE MAIN OIL PRESSURE CAUSED FROM A TRIM CHANGE (ENGINES WITHOUT PW SB 72-114)
0.150 (3.810)

0.140 (3.556)
0.130 (3.302)
0.120 (3.048)
0.110 (2.794)
TRIM DIAMETER CHANGE - INCHES (MM)

0.100 (2.540)
0.090 (2.286)
0.080 (2.032)
0.070 (1.778)
0.060 (1.524)
0.050 (1.270)
0.040 (1.016)
0.030 (0.762)
0.020 (0.508)
0.010 (0.254)
　
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