# SDR AALA2019041219006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2019
- Submitted: April 12, 2019
- Operation: Air carrier
- Aircraft: [N189UW](https://openairdocs.org/aircraft/N189UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1425
- Aircraft time: 61,010 hours, 22,808 cycles
- System (JASC): [3415 · High Speed Warning](https://openairdocs.org/jasc/3415)
- Part: Sensor
- Part number: 780A000002
- Part serial: 01131
- Condition: Faulty
- Location: Zone 200 - Fuse
- Part time: 57,683 hours, 22,884 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019041219006

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS FLIGHT RETURNED TO PHX ON ACCOUNT OF FALSE OVERSPEED WARNING. EMERGENCY DECLARED AND THE FLIGHT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE CONFIRMS THE AIRCRAFT WAS IN CLEAN/FLAP UP CONFIGURATION DURING THE OVERSPEED WARNING EVENTS. MAINTENANCE SUSPECTS THE FLAP HANDLE COMMAND SENSOR AT FAULT. REMOVED AND REPLACED THE FLAP CONTROL COMMAND SENSOR UNIT IAW AMM 27-51-17. OPS CHECK GOOD.

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