145 Navigation (ATA 34) service difficulty reports for the Airbus A321 (all variants) — 0.4% of all reported difficulties.
Most reported components
- TRANSCEIVER 25
- RADAR 15
- UNKNOWN 11
- FMC 10
- ADIRU 8
- CONTROL UNIT 7
- PROBE 5
- AIR DATA MODULE 5
- DRIVE ASSY 4
- FCU 3
- SENSOR 3
- WARNING MESSAGE 3
- WINDSHEAR SYS 3
- COMPUTER 2
- WARNING SYSTEM 2
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).