# SDR AALA2019060549004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2019
- Submitted: June 5, 2019
- Operation: Air carrier
- Aircraft: [N970UY](https://openairdocs.org/aircraft/N970UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3924
- Aircraft time: 36,305 hours, 12,944 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Air Data Module
- Part number: 87232329V03
- Part serial: 13731
- Condition: Unreliable
- Part time: 36,305 hours, 12,944 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: I
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019060549004

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS INDICATED SPEED ON PFD OFF BY 5-6 KNOT AT 80 KNOT AND V SPEED CALLOUTS. ONCE AIRBORNE INDICATED AIRSPEED THE SAME ON BOTH AIRSPEED INDICATORS BELOW 1000 ON APPROACH DIFFERED BY 5 KNOTS. MAINTENANCE REMOVED AND REPLACED AIR DATA MODULE 19FP1 AND 19FP2 IAW AMM 34-11-17. TESTED IAW AMM 34-13-00-720-009-B, TEST OK. NO SPLIT NOTED. (SEE SDR # AALA201906059015)

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