# SDR AALA202303155107

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2023
- Submitted: March 15, 2023
- Operation: Air carrier
- Aircraft: [N124US](https://openairdocs.org/aircraft/N124US), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 1314
- Aircraft time: 63,795 hours, 31,746 cycles
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Contactor
- Part number: E0175B01E00
- Condition: Defective
- Location: Zone 100 - Fuse
- Stage of operation: DE
- How discovered: V
- Nature of condition: B, O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202303155107

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED: DESCENDING THRU 9000 FT CAPTAINS DISPLAY UNIT FAILED THEN CAME BACK ON BUT SIDES WERE REVERSED WITH NAV DISPLAY, FOLLOWED BY A STRONG ELECTRICAL SMELL. THE AIRCRAFT LANDED SAFELY CLT WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE CAPTAINS DISPLAY UNIT PER AMM 31-63-22 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK. (AALA202303158181) WHILE TROUBLESHOOTING THIS EVENT MAINTENANCE FOUND VENT BLOWER AND VENT EXTRACT FAULT STATUS MESSAGES. MAINTENANCE REPLACED CONTACTOR 8HQ PER ESPM 20-45-24 (AALA202303155107) AND REPAIRED A BROKEN WIRE ON CONTACTOR 7QH PER ESPM 20-53-55. (AALA202303154298). A SATISFACTORY OPERATIONAL CHECK OF THE AVIONICS EQUIPMENT VENTILATION SYSTEM WAS ACCOMPLISHED PER AMM 21-26-00 WITH NO FAULTS NOTED.

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