What was found
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.
- Difficulty date
- January 11, 2023
- Submitted
- January 13, 2023
- Operation
- Air carrier
- Aircraft
- N860GT
- Make and model
- Boeing 7478F
- Aircraft serial
- 67147
- Aircraft time
- 2,738 hours, 435 cycles
- System (JASC)
- 3445 · Air Collision Avoidance System
- 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
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.