(b)
If engine oil temperature is less than 25°C, as an alternate procedure you can use CMCS Input Monitoring to make sure the Oil Filter Bypass Warning Input System is correct (AMM 45-10-00/201).
ENG 1: Make sure bit 17 shows 0 (input format "C/26/007/01") ENG 2: Make Sure bit 24 shows 0 (input format "C/26/003/10") ENG 3: Make sure bit 22 shows 0 (input format "C/26/003/00") ENG 4: Make Sure bit 14 shows 0 (input format "C/26/002/11")
S 785-011-N00
(6)
Decrease the pressure at the differential pressure switch to zero.
S 085-012-N00
(7)
Disconnect the line for the air pressure source from the
differential pressure switch.
S 435-013-N00
(8)
Connect the inlet pressure tube to the differential pressure switch.
(a) Tighten the tube nut to 135-145 pound-inches (15.253-16.383 newton-meters).
S 715-056-N00
(9)
Do the test of the oil filter differential pressure switch that is
shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
G.
Put the Airplane Back to Its Usual Condition.
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79-35-00
ALL ú ú N01 Page 507 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 415-023-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Close the left thrust reverser (AMM 78-31-00/201).
S 415-018-N00
(2)
Close the left core cowl panel (AMM 71-11-06/201).
S 415-019-N00
(3)
Close the left fan cowl panel (AMM 71-11-04/201).
S 445-020-N00
(4)
Do the activation procedure for the thrust reverser (AMM 78-31-00/201).
S 865-025-N00
(5)
Put the applicable EEC MAINT ENG (1, 2, 3, or 4) POWER switch on the P461 panel to the NORM position.
S 865-015-N00
(6)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
79-35-00
ALL ú ú N01 Page 508 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL FILTER DIFFERENTIAL PRESSURE SWITCH - REMOVAL/INSTALLATION
______________________________________________________________
1. General
_______
A. This procedure gives the instructions to remove and install the
differential pressure switch (S1583) for the oil filter.
B. The differential pressure switch is installed on the lower forward side of the housing of the main oil filter. The housing is installed on the forward face of the main gearbox at the 8 o'clock position.
C. You can get access to the differential pressure switch for the oil filter through the left thrust reverser.
TASK 79-35-01-004-001-N00
2. Remove the Oil Filter Differential Pressure Switch (Fig. 401)
__________________________________________________
A. Standard Tools and Equipment
(1)
Container - 5 U.S. gallon (19 liter) capacity,
used to catch the oil
B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 78-31-00/201, Thrust Reverser System
(4)
IPC 79-35-01 Fig. 1
(5)
WDM 79-35-11
(6)
SSM 79-35-01
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