# SDR 9JLA2022031524161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2022
- Submitted: March 15, 2022
- Operation: Air carrier
- Aircraft: [N546DH](https://openairdocs.org/aircraft/N546DH), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 45150
- Aircraft time: 8,025 hours, 5,740 cycles
- System (JASC): [3445 · Air Collision Avoidance System](https://openairdocs.org/jasc/3445)
- Part: Tcas System
- Part number: 066011461211
- Part serial: 42752
- Condition: Failed
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2022031524161

## Discrepancy

THE FLIGHT CREW REPORTED THAT THE TCAS SYSTEM FAILED PREFLIGHT CHECKS. OPERATIONS WERE CONTINUED PER MEL 34-45-02 CAT C. AT CORRECTIVE ACTION THE MAINTENANCE TEAM REMOVED AND REPLACED THE TCAS PROCESSOR WITH REPAIRED UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE

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