(4)
Install the oil level sensor (3) (Ref. AIPC 49930450010) in the oil sump and secure it with the bolt (1).
(5)
TORQUE the bolt (1) to between 24 and 27 lbf.in (0.27 and 0.30 m.daN).
(6)
Remove the blanking caps from the electrical connectors.
(7)
Connect the electrical connector P8 (4) to the oil level sensor (3). Subtask 49-93-17-865-052
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
Subtask 49-93-17-710-050
C. Test
(1) Do the operational test of the APU (Ref. TASK 49-00-00-710-008).
(a) Operate the APU for min. five minutes and examine the joints of the oil level sensor for leaks.
NOTE : Leaks are not permitted.
____
________
5. Close-up
Subtask 49-93-17-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(3)
Remove the access platform(s). Subtask 49-93-17-860-052
B.
Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(2)
De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
(3)
Remove the warning notice(s).
LOW OIL PRESSURE AND HIGH OIL TEMPERATURE WARNING - DESCRIPTION AND OPERATION
_____________________________________________________________________________
R **ON A/C 001-003, 051-099, 401-499,
1.
General
_______ The low oil pressure and high oil-temperature warning-system together with the ECB 59KD monitor the APU oil pressure and the oil temperature. They also monitor the temperature of the APU generator scavenge oil. The system protects the APU against low oil pressure and high oil temperature. When the ECB 59KD receives the low oil pressure or a high oil-temperature signal, it starts the APU automatic shutdown-sequence (Ref. 49-61-00).
2.
Component Location
__________________
(Ref. Fig. 001)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
-------------------------------------------------------------------------------SWITCH - OIL TEMPERATURE 315 315AL 49-94-13 PRESSURE SWITCH - OIL 315 315AL 49-94-14
3. System Description
__________________
(Ref. Fig. 002)
A. Low Oil and High Oil Pressure Warning
(1) The low oil pressure and high oil-temperature warning-system has the subsequent primary components:
-
a (Low) Oil-Pressure Switch (LOP SW),
-
a (High) Oil-Temperature Switch (HOT SW). The HOT SW and the LOP SW are installed on a common manifold on the left side of the APU. They measure the oil pressure and temperature downstream the oil pressure filter. If the temperature is too high or the oil pressure is to low the switch transmits a signal to the ECB and starts the automatic APU shutdown sequence.
4. Interface
_________ The Low Oil Pressure and High Oil Temperature Warning system has interface with:
-
the APU Control and Monitoring System (Ref. 49-61-00),
-
the Storage and Distribution System (Ref. 49-91-00).
LOP and HOT Warning - Component Location
Figure 001
CES
LOP and HOT Warning - Block Diagram
Figure 002
CES 5. Operation/Control and Indication
________________________________ (Ref. Fig. 002) The HOT SNSR measures the temperature of the oil downstream of the oil cooler. The ECB 59KD receives the temperature signal and thus it monitors the APU oil temperature. It starts the APU automatic shutdown sequence if the oil temperature is more than the limit (Ref. 49-61-00). The LOP SW monitors the pressure downstream of the oil pressure filter. It transmits a low oil-pressure signal to the ECB 59KD when the oil pressure decreases below the limit (Ref. 49-61-00). Then the ECB 59KD starts the APU automatic shutdown sequence.
LOW OIL PRESSURE AND HIGH OIL TEMPERATURE WARNING - DESCRIPTION AND OPERATION
_____________________________________________________________________________
1.
General
_______ The low oil pressure and high oil-temperature warning-system together with the ECB 59KD monitor the APU oil pressure and the oil temperature. The system protects the APU against low oil pressure and high oil temperature. When the ECB 59KD receives the low oil pressure or a high oil-temperature signal, it starts the APU automatic shutdown-sequence (Ref. 49-61-00). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM 机载辅助动力 AIRBORNE AUXILIARY POWER 6(165)
