# SDR AALA202104099005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2021
- Submitted: April 9, 2021
- Operation: Air carrier
- Aircraft: [N150UW](https://openairdocs.org/aircraft/N150UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 5504
- Aircraft time: 24,870 hours, 10,014 cycles
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Sensor
- Part number: RP19802
- Part serial: 1203
- Condition: Inoperative
- Location: Zone 400
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104099005

## Discrepancy

AIRCRAFT WAS GROUNDED: ON DECENT THRUST SHOULD HAVE BEEN IDLE, BUT FULLY AUTHORITY DIGITAL ELECTRONIC CONTROLLER SEEMS TO BOUNCE THRUST UP AND DOWN SPURIOUSLY. ACCOMPLISHED AMM TASK 34-11-18-200-002-A, VISUALLY INSPECTED TOTAL AIR TEMPERATURE SENSORS PER EA NUMBER 326865, NO OBVIOUS DISCREPANCY NOTED. REMOVED AND REPLACED E1 AND E2 (AALA202104099014) T12 SENSORS PER AMM 73-21-40 AND EA NUMBER 326865.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.