# SDR UIEA2023011200016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2023
- Submitted: January 13, 2023
- Operation: Air carrier
- Aircraft: [N860GT](https://openairdocs.org/aircraft/N860GT), registered now
- Make and model: Boeing 747-8F
- Registry model: [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f) (OpenAirDocs)
- Aircraft serial: 67147
- Aircraft time: 2,738 hours, 435 cycles
- System (JASC): [3445 · Air Collision Avoidance System](https://openairdocs.org/jasc/3445)
- Part: Tcas System
- Part number: 8222482101
- Part serial: 4R0DCY
- Condition: Failed
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2023011200016

## Discrepancy

DUAL TCAS SYSTEM FAILURE AT CRUISE. CAN'T ENTER CHINESE AIRSPACE WITHOUT TCAS. AIR RETURN TO ICN.  R & R RT CMC & OPS & SYS TEST OK IAW AMM 45-10-00/501. PERFORMED TCAS OPS & TCAS INTERFACE TEST, TEST OK IAW AMM 34-45-00/501.

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