DOC AIRBUS | AMM A320FOIL - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The APU oil system lubricates and cools the power section, load compressor, gearbox and AC-Generator. This system is made up of:
** ON A/C NOT FOR ALL The APU oil system lubricates and cools the power section, load compressor, gearbox and AC-Generator. This system is made up of:
- an integral wet-sump lubrication system with an APU mounted oil cooler,
- an oil level, high oil temperature and low oil-pressure monitoring system.
2. System Description
A. Storage and Distribution
The oil storage and distribution system supplies filtered, temperature and pressure regulated oil to:
The oil storage and distribution system supplies filtered, temperature and pressure regulated oil to:
- the engine,
- the APU generator.
- an integral oil reservoir with a magnetic chip detector, an oil level sensor and an oil level sight glass,
- an oil pressure pump,
- two oil scavange pumps,
- an oil filters,
- an oil cooler,
- a de-oiling valve.
- the power section,
- the load compressor,
- the accessory gearbox,
- the generator.
B. Indicating
The oil indicating system shows you if the oil quantity in the integral oil reservoir in the accessory drive gearbox is sufficient or if an oil servicing is necessary.
The ECB 59KD monitors the oil quantity through the oil level sensor 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 oil level sensor, it transmits the signal to:
The oil indicating system shows you if the oil quantity in the integral oil reservoir in the accessory drive gearbox is sufficient or if an oil servicing is necessary.
The ECB 59KD monitors the oil quantity through the oil level sensor 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 oil level sensor, it transmits the signal to:
- the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00),
- the Centralized Fault Display System (CFDS).
- the APU page on the lower ECAM display unit,
- the APU DATA/OIL page on the MCDU.
C. Low Oil Pressure and High Oil-Temperature Warning
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. AMM D/O 49-61-00-00).
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. AMM D/O 49-61-00-00).