# SDR AALA202507246550

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2025
- Submitted: July 24, 2025
- Operation: Air carrier
- Aircraft: [N339SU](https://openairdocs.org/aircraft/N339SU), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44485
- Aircraft time: 14,243 hours, 5,341 cycles
- System (JASC): [3445 · Air Collision Avoidance System](https://openairdocs.org/jasc/3445)
- Part: Computer
- Part number: 8222911002
- Part serial: 7994X
- Condition: Failed
- Location: Zone 100  Tcas
- Part time: 6,112 hours, 2,839 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202507246550

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: TACAS FAILED ON TAKEOFF AND CLIMB WOULD NOT RESET. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. REMOVED AND REPLACED TCAS COMPUTER. PER AMM 34-45-01. OPERATIONAL CHECK GOOD.

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