DOC AIRBUS | AMM A320FOIL INDICATING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The oil indicating system shows you if the oil quantity in the accessory drive gearbox is sufficient or if an oil servicing is necessary.
The ECB 59KD monitors the oil quantity through the low oil level switch
in the static condition (when the APU does not operate). The set minimum agrees with the ADD mark on the oil sight glass on the gravity oil fill-port.
When the ECB 59KD receives a low-oil quantity signal from the low oil level switch, it transmits the signal to:
** ON A/C NOT FOR ALL The oil indicating system shows you if the oil quantity in the accessory drive gearbox is sufficient or if an oil servicing is necessary.
The ECB 59KD monitors the oil quantity through the low oil level switch
in the static condition (when the APU does not operate). The set minimum agrees with the ADD mark on the oil sight glass on the gravity oil fill-port.
When the ECB 59KD receives a low-oil quantity signal from the low oil level switch, it transmits the signal to:
- the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00),
- the Central Fault Display System (CFDS) (Ref. AMM D/O 31-32-00-00).
- the APU page on the lower ECAM display unit,
- the APU SERVICE DATA on the MCDU.
2. Component Location
** ON A/C NOT FOR ALL 
Oil Indicating - Component Location| ------------------------------------------------------------------------------- |
| FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA |
| | | | | DOOR | REF. |
| ------------------------------------------------------------------------------- |
| SWITCH - OIL LEVEL 316 316AR 49-93-16 |
3. System Description
A. Oil Indication System
The primary component of the oil indicating system is the oil level switch. It is installed next to the fill port. A float-mounted magnet operates the switch to supply a discrete signal to the ECB. The sensor transmits the low oil-quantity signal to the ECB, if the oil quantity is at or below the set minimum of oil level.
The primary component of the oil indicating system is the oil level switch. It is installed next to the fill port. A float-mounted magnet operates the switch to supply a discrete signal to the ECB. The sensor transmits the low oil-quantity signal to the ECB, if the oil quantity is at or below the set minimum of oil level.
4. Interface
The Oil Indicating system has interface with:
** ON A/C NOT FOR ALL The Oil Indicating system has interface with:
- the APU Control and Monitoring System (Ref. AMM D/O 49-61-00-00),
- the Storage and Distribution System (Ref. AMM D/O 49-91-00-00).
5. Operation/Control and Indicating
The oil level switch is energized from the ECB. When the ECB receives the low oil level signal it transfers the signal to the EIS. The APU system page of the lower ECAM display unit shows the advisory 'LOW OIL LEVEL'.
When you enter the CFDS, the MCDU shows on the APU SERVICE DATA page the status OIL LEVEL: (LOW).
This occurs when the aircraft is on ground and APU not running.
The following schedule shows the amount of oil in the gearbox at the
condition of the APU:
*
These values are determined for A/C ground condition. The values can vary in relation of the different operating attitudes of the A/C in flight.
The oil level switch is energized from the ECB. When the ECB receives the low oil level signal it transfers the signal to the EIS. The APU system page of the lower ECAM display unit shows the advisory 'LOW OIL LEVEL'.
When you enter the CFDS, the MCDU shows on the APU SERVICE DATA page the status OIL LEVEL: (LOW).
This occurs when the aircraft is on ground and APU not running.
The following schedule shows the amount of oil in the gearbox at the
condition of the APU:
| FULL ............. 6.26 l (1.65 USgal) |
| ADD ............. 4.60 l (1.22 USgal) |
| Low Oil Level (LOL) ............. 4.60 l (1.22 USgal)* |
| Low Oil Pressure (LOP) ............. 2.92 l (0.77 USgal)* |
*
These values are determined for A/C ground condition. The values can vary in relation of the different operating attitudes of the A/C in flight.