# SDR UALA2012100105551

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2012
- Submitted: November 15, 2012
- Operation: Air carrier
- Aircraft: [N777UA](https://openairdocs.org/aircraft/N777UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26916
- Aircraft time: 70,757 hours, 12,754 cycles
- Engine: Pwa PW4077
- System (JASC): [3445 · Air Collision Avoidance System](https://openairdocs.org/jasc/3445)
- Part: Computer
- Part number: 8221293002
- Part serial: 771
- Condition: Faulty
- Location: Tcas
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012100105551

## Discrepancy

TCAS TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) FAILURE.  REPLACED TCAS COMPUTER, OP CHECKED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.