04/09/21
Message Overview:
Message Description:
Proximity-Sensor Electronic Unit (PSEU) detects an OPEN circuit within the Proximity Sensor PX46, Baggage Bay Door Closed or in the wiring to the proximity sensor or aircraft.
Possible Causes:
- Proximity Sensor Electronic Unit (PSEU) (A9)
- Baggage Door Handle Locked Proximity Sensor (PX46)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Proximity-Sensor Electronic Unit (PSEU) | AMM 32-61-09-000-801 |
| Installation of the Proximity-Sensor Electronic Unit (PSEU) | AMM 32-61-09-400-801 |
| Functional Test of the Proximity-Sensor Electronic Unit (PSEU) | AMM 32-61-09-720-801 |
| Operational Test of the Door Sensors | AMM 52-71-00-710-801 |
| Built-In Test of the Door Proximity-Sensors | AMM 52-71-00-740-801 |
| Removal of the Baggage-Door Locked Proximity-Sensor | AMM 52-71-05-000-802 |
| Installation of the Baggage-Door Locked Proximity-Sensor | AMM 52-71-05-400-802 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Pull and reset the PSEU gear system breakers (CB1-C13, CB1-C14, CB2-C13, CB2-C14), recheck the system for the fault.
- Verify the wiring check from the PSEU A9CP1 PIN 6F to PX46 SP114 PIN A2, and from PSEU A9CP1 PIN 5F to PX46 SP114 PIN B2.
- If the wiring checks good, download and have field service review the PSEU NVM. Further troubleshooting will depend on results of the PSEU NVM.
- If the fault is still there, replace PX46 per the installation procedure, and then check the sensor out.
- If the fault is still there, replace the PSEU.
- Functional check the proximity sensor electronic unit.
- Do close out.
