What was found
AIR TURN BACK, TCAS SYSTEM ADVISORY MESSAGE CHECK CMC PRESENT LEG FAULT.FND TCAS LOWER ANTENNA FAIL. REPLACED LOWER TACAS ANTENNA .PFM GOUND TEST PASS.PER AMM34-45-02.SYS BACK TO NML.
- Difficulty date
- January 30, 2026
- Submitted
- February 6, 2026
- Operation
- Air carrier
- Aircraft
- N570UP
- Make and model
- Boeing 74744AF
- Aircraft serial
- 35667
- Aircraft time
- 65,663 hours, 10,777 cycles
- System (JASC)
- 3445 · Air Collision Avoidance System
- Part
- Antenna
- Part number
- 7514081901
- Part serial
- ANE45256
- Condition
- Faulted
- Location
- Tcas Sys
- Stage of operation
- CL
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.