# SDR CALA2026050516011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2026
- Submitted: May 5, 2026
- Operation: Air carrier
- Aircraft: [N47280](https://openairdocs.org/aircraft/N47280), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 64614
- Aircraft time: 11,457 hours, 3,971 cycles
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Adiru
- Part number: HG2050BC04
- Part serial: 1973
- Condition: Faulted
- Location: Zone 100
- Part time: 11,447 hours, 3,966 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: F, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026050516011

## Discrepancy

LEFT IRS FAULT LIGHT ON NON NORMAL COMP DEBRIEFED WITH CREW, CHECKED FOR FAULTS IN DFCS,   REPLACE L ADIRU. REF FIM 34-21 TASK 839   REPLACED L ADIRU, OPS CHECK GOOD REF AMM 34-21-00.

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