FWD
A-A
Low Oil Pressure Warning Switch Location
Figure 401 (Sheet 1)
E18784
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B
OIL PRESSURE TRANSMITTER
ELECTRICAL CONNECTOR OIL PRESSURE TRANSMITTER
B CONNECTOR ELECTRICAL
VENT TUBE
LOW OIL PRESSURE WARNING SWITCH VENT TUBE
TUBE PRESSURE OIL B-B FWD
FWD
ENGINES WITH SB 79-2036 A
Low Oil Pressure Warning Switch Location Figure 401 (Sheet 2)
E18787
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 014-019-N00
(2) Open the left fan cowl panel (AMM 71-11-04/201).
S 044-025-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______
OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF
THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO
EQUIPMENT.
(3)
Do this procedure: Thrust Reverser Deactivation for Ground
Maintenance (AMM 78-31-00/201).
S 014-020-N00
(4)
Open the left core cowl panel (AMM 71-11-06/201).
S 014-026-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______
THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS,
INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(5)
Open the left thrust reverser (AMM 78-31-00/201).
D.
Remove the Warning Switch
S 034-003-N00
(1)
Disconnect the electrical connector (DS1584) from the warning
switch.
(a)
Install the protection cap.
S 034-004-N00
WARNING: BEFORE YOU OPEN THE OIL TANK CAP, PERMIT A MINIMUM OF FIVE
_______ MINUTES AFTER THE ENGINE SHUTDOWN TO LET THE PRESSURE IN THE OIL TANK BLEED OFF. A FAST FLOW OF HOT OIL CAN OCCUR AND CAUSE INJURY TO YOU.
DO NOT KEEP THE OIL ON YOUR SKIN FOR A LONG TIME. IF YOU DO NOT CLEAN THE OIL OFF, THE OIL CAN CAUSE INJURY.
(2)
Disconnect the tube nut which attaches the vent tube to the warning
switch.
S 034-005-N00
(3)
Disconnect the tube nut which attaches the oil pressure tube to the
warning switch.
(4)
Remove the bolts which attach the warning switch to the bracket.
S 034-006-N00
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S 024-007-N00
(5)
Remove the warning switch from the engine.
S 034-008-N00
(6)
Install the protection caps on the warning switch and open tube ports.
TASK 79-33-01-404-009-N00
3. Install the Low Oil Pressure Warning Switch (Fig. 401)
___________________________________________
A. Consumable Materials
(1)
D00390 Oil - Engine
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)
AMM 79-33-00/501, Low Oil Pressure Warning System
