# SDR AALA202110118137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2021
- Submitted: October 11, 2021
- Operation: Air carrier
- Aircraft: [N171US](https://openairdocs.org/aircraft/N171US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1465
- Aircraft time: 67,991 hours, 25,592 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adiru
- Part number: 46502003030316
- Part serial: 2882
- Condition: Inoperative
- Location: Zone 100 - Fuse
- Part time: 57,330 hours, 27,068 cycles
- Stage of operation: TO
- How discovered: V
- Nature of condition: P
- Precautionary procedure: C, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202110118137

## Discrepancy

AIRCRAFT WAS GROUNDED: AN ABORTED TAKE OFF WAS PERFORMED ABOVE 80 KNOTS DUE TO THE #1 AIR DATA INERTIAL REFERENCE UNIT BEING INOPERATIVE AND RETURNED TO THE GATE. REPLACED #1 AIR DATA INERTIAL REFERENCE UNIT AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 34-12-34.

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