# SDR AALA2019041109020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2019
- Submitted: April 11, 2019
- Operation: Air carrier
- Aircraft: [N519UW](https://openairdocs.org/aircraft/N519UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3881
- Aircraft time: 35,546 hours, 12,565 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Sensor
- Part number: 4502310000
- Condition: Faulty
- Location: Hyd System
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019041109020

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS AIR RETURNED TO PHL ON ACCOUNT OF GREEN HYDRAULIC SYSTEM LOSS (SYSTEM OVERHEAT). EMERGENCY DECLARED AND THE AIRCRAFT WAS OVERWEIGHT FOR LANDING. MAINTENANCE PERFORMED T/S IAW TSM 29-11-00-810-802-A UNABLE TO REPRODUCE GREEN HYD. RESERVOIR OVERHEAT. POST FLIGHT REPORT SHOWED GREEN HYD. PRESS SW 2. REMOVED AND REPLACED G HYD PRESS SW 10CE2 IAW AMM 27-97-17-000-001/400-801 OPS CHECKS/LEAK CHECKS GOOD OK FOR SERVICE.

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