# SDR GTIA2025050538897

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2025
- Submitted: May 5, 2025
- Operation: Air carrier
- Aircraft: [N671NK](https://openairdocs.org/aircraft/N671NK), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7246
- Aircraft time: 28,133 hours, 12,517 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Isis
- Part number: C16786EA01
- Part serial: C16786016943
- Condition: Inoperative
- Location: Cockpit
- Part time: 28,130 hours, 12,514 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA2025050538897

## Discrepancy

IN FLIGHT: STAND BY ISIS FAILED-R/R ISIS IAW AMM 34-22-25 OP CHECK GOOD

---
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.