# SDR CALA2025101610187

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2025
- Submitted: October 16, 2025
- Operation: Air carrier
- Aircraft: [N844UA](https://openairdocs.org/aircraft/N844UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1581
- Aircraft time: 72,816 hours, 32,667 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adr
- Condition: Faulted
- Location: Nr 1
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025101610187

## Discrepancy

NAV ADR 1 FAULT LAND VERIFY REQUIRED CYCLED RELATED BREAKERS, RERACKED ADIRU 1 AND PERFORMED BITE TEST OF ADIRU AND IRU TWICE REF AMM 34-13-00-740 AND AMM 34-14-00-740-004 TEST PASSED ON BOTH ATTEMPTS AND TESTED ADIRU 2 AND 3 ALL TESTS PASSED VIEW PICTURES TAKEN. NO DEFECTS NOTED.

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