# SDR AALA201811199037

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2018
- Submitted: December 18, 2018
- Operation: Air carrier
- Aircraft: [N552UW](https://openairdocs.org/aircraft/N552UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4957
- Aircraft time: 24,720 hours, 9,054 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Unit
- Part number: C12850AC03
- Part serial: C12850010677
- Condition: Faulty
- Location: Autopilot Sys
- Part time: 13,673 hours, 5,247 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201811199037

## Discrepancy

THE AIRCRAFT WAS GROUNDED. RETURNED TO CLT DUE TO AUTO-PILOT FAULT DURING CLIMB OUT. REMOVED AND REPLACED FLIGHT CONTROL UNIT PER AMM 22-81-12. BITE AND OPERATIONS TEST SATISFACTORY.

---
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.