# SDR 2020FA0000549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2020
- Submitted: December 15, 2020
- Operation: General aviation
- Aircraft: [N183TF](https://openairdocs.org/aircraft/N183TF), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 45273
- Aircraft time: 4,886 hours, 4,445 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Ahrs
- Part number: 1421851102
- Part serial: 1207
- Condition: Inoperative
- Location: E/E Bay
- Part time: 4,886 hours, 4,445 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020FA0000549

## Discrepancy

PILOT REPORTS AHRS INOPERABLE.  AFTER FURTHER INSPECTION FOUND NR 1 AHRS WAS NO LONGER COMMUNICATING WITH AIRCRAFT SYSTEMS.  REPLACED NR 1 AHRS AND PERFORMED FUNCTIONAL TESTS.  OPERATIONS CHECKED GOOD, AIRCRAFT OK FOR RETURN TO SERVICE.

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