04/22/21
Message Overview:
Message Description:
Right engine oil chips detected.
[MCID 1014]
Oil chips detected.
Detection of oil chips in the engine lube system was sensed.
The chip detector is an electrical-discharge magnetic plug. The chip detector monitors all engine lubrication oil returning from the engine oil sumps. When electrically-conductive material bridges the chip detector gap, the ECUs sense this continuity and discharge a capacitor in an attempt to clear the gap of debris.
- If the electrical discharge does not clear the debris after 5 attempts, or if debris has been cleared 20 times, the ECUs record a chip indication that is annunciated to the aircraft with the L/R Engine Oil Chip CAS message and this fault is set.
Possible Causes:
- Metallic Contamination in the oil
- Chip Detector
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW300-76-0243 - Electronic Control Unit (ECU) Water Ingress
- AW300-71-0335 - AS907 Engine - No. 4 Aft Sump
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Engine Electronic Control Unit (ECU) | AMM 76-10-05-000-801 |
| Installation of the Engine Electronic Control Unit (ECU) | AMM 76-10-05-400-801 |
| Removal of the Oil Pump | AMM 79-21-01-000-802 |
| Installation of the Oil Pump | AMM 79-21-01-400-802 |
| Removal of the Oil Filter | AMM 79-21-05-000-801 |
| Installation of the Oil Filter | AMM 79-21-05-400-801 |
| Removal of the Chip Detector | AMM 79-21-09-000-801 |
| Installation of the Chip Detector | AMM 79-21-09-400-801 |
| Removal of the Oil Filter Bypass-Indicator | AMM 79-31-01-000-802 |
| Installation of the Oil Filter Bypass-Indicator | AMM 79-31-01-400-802 |
| Removal of the Oil Temperature Transducer | AMM 79-31-05-000-801 |
| Installation of the Oil Temperature Transducer | AMM 79-31-05-400-801 |
| Removal of the Oil Pressure Transducer | AMM 79-31-09-000-801 |
| Installation of the Oil Pressure Transducer | AMM 79-31-09-400-801 |
| Removal of the Oil Level Probe | AMM 79-31-13-000-801 |
| Installation of the Oil Level Probe | AMM 79-31-13-400-801 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Isolate per the Light Engine Maintenance Manual System Check 5 (LMM Subtask 72-00-00-810-399-A01), and MCID 1014 (LMM Subtask 72-00-00-810-174-A01).
- Disconnect and examine the OIL CHIP DETECTOR ZAP connector W4P10 for damaged wires and other damage. (Refer to LEMM TASK PGBLK 76-10-05-3000, Removal).
- Measure the resistance at the chip detector as shown in the list below. The measured resistance must be 18 to 22 kΩ. If the resistance is not within the range given, replace the chip detector.
Connector Pin Reading Chip Detector 1, 2 18 to 22 kΩ - Do a internal short check as shown in the lists below. The measured resistance must be less than 5 Ω. If the resistance is not within the range given, replace the chip detector.
Connector Pin Reading W4P10 1, 2 5 Ω - Measure the resistance at each pin to the case of the chip detector. The measured resistance must be greater than 50 MΩ. If the resistance is not within the range given, replace the chip detector.
- Disconnect and examine the INTERFACE connector W4P1 and the INTERFACE connector W6J5 for damaged wires and other damage. (Refer to LEMM TASK PGBLK 76-10-05-3000, Removal).
- Do a continuity check as shown in the list below. No open circuits allowed.
Connector Pin Connector Pin Reading W4P10 1 W6P2 75 < 1 Ω W4P10 2 W6P2 76 < 1 Ω W4P10 1 W6P3 75 < 1 Ω W4P10 2 W6P3 76 < 1 Ω - Reconnect all the connectors. (Refer to LEMM TASK PGBLK 76-10-05-4000, Installation).
- Troubleshoot the aircraft oil chip detector circuit. (Refer to the Aircraft Maintenance Manual).
