# SDR 2023F00090

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2023
- Submitted: March 28, 2023
- Operation: General aviation
- Make and model: Boeing 737-73A
- Registry model: [Boeing 737-73A](https://openairdocs.org/model/boeing-737-73a) (OpenAirDocs)
- Aircraft serial: 28498
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Indicator
- Part number: H341BWM
- Part serial: 9555
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: TX
- How discovered: V
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023F00090

## Discrepancy

STBY HORIZON INOP. CANCELLED FLIGHT. CORRECTIVE ACTION: REMOVED AND REPLACED STBY ATTITUDE INDICATOR IAW AMM 34-247-01 AND AMM 34-24-00. SYSTEM TEST WITHOUT DISCREPANCIES.

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