# SDR ASAA2023010841465

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2023
- Submitted: January 10, 2023
- Operation: Air carrier
- Aircraft: [N975AK](https://openairdocs.org/aircraft/N975AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64960
- Aircraft time: 2,618 hours, 767 cycles
- System (JASC): [3418 · Stall Warning System](https://openairdocs.org/jasc/3418)
- Part: Aoa
- Part number: 0861FL1
- Part serial: 15373
- Condition: Inoperative
- Location: Left
- Part time: 33,703 hours, 10,669 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023010841465

## Discrepancy

AUTOPILOT A INOP. GROUNDED - YES. FCC-A LOGGED 75 FAULTS AT FL360. MOST PERTAINING TO LEFT ADIRU. LEFT ADIRU LOGGED 34-21023, AOA SIGNAL FAIL FOR THREE LEGS.REMOVED & REPLACED LEFT AOA VANE. REF B737-9 AMM 34-21-05-000-801 & 34-21-05-400-801.

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