# SDR AALA20151216002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 2015
- Submitted: December 16, 2015
- Operation: Air carrier
- Aircraft: [N147AA](https://openairdocs.org/aircraft/N147AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6802
- Aircraft time: 357 hours, 140 cycles
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20151216002

## Discrepancy

DURING APPROACH, AT APPROX 2300 FEET, ACFT WENT TO TOGA-GIA MODE AT MANNED SPEED SELECTION.  ABORTED APPROACH. DURING GO AROUND MADE SEVERAL ATTEMPTS DISCONNECT TOGA FROM AUTO THRUST SYS, EACH TIME POWER WENT BACK TO TOGA.  AUTOPILOT 1 DISCONNECTED SEVERAL TIMES DURING EVENT.  ACCOMPLISHED OPERATIONAL TEST OF THE AUTO THRUST SYS ISOLATION, WITH AIBS, IAW AMM 22-30-00 & LAND CAT III CAPABILITY TEST IAW AMM 22-97-00 WITH NO FAULTS FOUND.  SYS CHECKED NORMAL.

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