OIL DEBRIS INDICATING SYSTEM - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General

A. The engine oil system has the indication and warning systems that follow:

Main oil pressure indicating system
Low oil pressure indicating system
Main oil temperature indicating system
Auxiliary oil pressure indicating system
Oil level indicating system
Oil filter differential pressure system
Oil debris monitoring system.

(1) These systems are used to monitor oil system conditions and signal the flight crew of possible problems.

(2) Components in the indicating systems send a signal to the Electronic Engine Control (EEC), which then sends the signal to the Electronic Centralized Aircraft Monitoring (ECAM) System.

** ON A/C NOT FOR ALL

2. Component Location

FIN	FUNCTIONAL DESIGNATION	PANEL	ZONE	ACCESS DOOR	ATA REF
** ON A/C NOT FOR ALL
4074KS	SENSOR-OIL DEBRIS MONITORING		400		73-11-00

** ON A/C NOT FOR ALL

3. System Description

Oil Debris Indicating System (ODM) ** ON A/C NOT FOR ALL

A. Oil Debris Monitoring (ODM) Sensor

(1) The ODM sensor is attached to the oil tank at approximately the 9:30 o'clock position.

(a) The ODM sensor is used to find and measure metallic debris in the engine lubrication system. Debris may be from external sources or made by wear of the engine parts in the oil system.

(b) The sensor is installed between the main oil scavenge line and the deaerator in the oil tank assembly.

(d) The sensor can identify the difference between ferrous and non-ferrous particles.

(e) The ODM sensor sends debris count information to the Prognostics and Health Management Unit (PHMU). The PHMU calculates the number of particles in a given time period (Ref. AMM D/O 77-31-00-00).

(f) The PHMU will send the calculated signal to channel A of the EEC. The EEC then compares the data to prepared values and sends an applicable signal to the ECAM.

(g) The ODM sensor is a line replaceable unit.

[Rev.10 from 2021] 2026.04.01 03:42:23 UTC