DOC AIRBUS | AMM A320FOIL QUANTITY INDICATING SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The oil quantity-indicating system has an oil level sensor.
** ON A/C NOT FOR ALL The oil quantity-indicating system has an oil level sensor.
Oil Quantity Indicating System2. System Description
A. Oil Level Sensor (OLS)
(1) The OLS function is to measure the remaining oil level in the oil tank.
(2) The OLS is installed on the oil tank, located on the right-hand side of the fan case at the 4 o'clock aft looking forward position (Ref. AMM D/O 79-10-00-00). An O-ring is installed on the OLS to prevent oil leakage.
(3) The OLS is a single channel sensor made of :
- A flange equipped with a connector
- An aluminum body
- A magnetic float
- An electronic board with a series of reed switches and resistances.
(4) Reed switches are installed regularly along the electronic board. Those switches are closed depending on the position of the oil surface by the magnetic float.
When a reed switch closes, it connects a specific resistance into the electronic board. The resistance value is proportional to the oil level. The electrical signal is sent to Electronic Engine Control (EEC) Channel A.
When a reed switch closes, it connects a specific resistance into the electronic board. The resistance value is proportional to the oil level. The electrical signal is sent to Electronic Engine Control (EEC) Channel A.