# SDR SWAA2023010386881

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2023
- Submitted: January 3, 2023
- Operation: Air carrier
- Aircraft: [N8769Q](https://openairdocs.org/aircraft/N8769Q), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67519
- Aircraft time: 1,071 hours, 600 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Adiru
- Condition: Faulted
- Location: Zone 100
- Stage of operation: AP
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023010386881

## Discrepancy

ON APPROACH; IAS DISAGREE AND ALTITUDE DISAGREE WARNINGS. CAPTAIN IAS 40 KTS SLOW; CA ALTIMETER 500' LOW. F/O AND STANDBY INSTRUMENTS ACCURATE.   REF FIM 34-61-00 BITE CHECKED ADIRUS AND FOUND LEFT ADIRU FAULTING.  R&R LEFT ADIRU PER AMM34-21-01.  REF LOG PAGE 0279303E FOR FINAL ACTION.  AIRCRAFT DOWNGRADED TO CAT 1, REF TTG8Q00GZRWJ.

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