# SDR AALA202107067662

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2021
- Submitted: July 7, 2021
- Operation: Air carrier
- Aircraft: [N378SC](https://openairdocs.org/aircraft/N378SC), registered now
- Make and model: Boeing 737823
- Aircraft serial: 44471
- Aircraft time: 687 hours, 315 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Adiru
- Part number: HG2050BC04
- Part serial: 2371
- Condition: Faulted
- Location: Zone 100
- Part time: 686 hours, 315 cycles
- Stage of operation: TO
- How discovered: V
- Nature of condition: J, I
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202107067662

## Discrepancy

AIRCRAFT WAS GROUNDED: REJECTED TAKEOFF DUE TO AIRSPEED DISAGREE. REPLACED AIR DATA INERTIAL REFERENCE UNIT WITH SERVICEABLE UNIT IAW AMM 34-21-01, OPS CHECK GOOD.

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