# SDR AALA2021102714658

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 24, 2021
- Submitted: October 27, 2021
- Operation: Air carrier
- Aircraft: [N741UW](https://openairdocs.org/aircraft/N741UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1269
- Aircraft time: 55,702 hours, 33,962 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Adiru
- Part number: 46502003030316
- Part serial: 2292
- Condition: Unserviceable
- Location: Zone 100 - Fuse
- Part time: 69,328 hours, 29,294 cycles
- Stage of operation: TO
- 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/AALA2021102714658

## Discrepancy

AIRCRAFT WAS GROUND: UNREADABLE AIRSPEED ON TAKEOFF. EMERGENCY DECLARED, RETURNED TO ATL, LANDING SAFELY. REPLACED AIR DATA AND INERTIAL REFERENCE UNIT #3 PER AMM 34-12-34.

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