393 Fuel (ATA 28) service difficulty reports for the Airbus A321 (all variants) — 1% of all reported difficulties.
Most reported components
- ACTUATOR 44
- PUMP 31
- WARNING MESSAGE 31
- CONTROL UNIT 27
- RELAY 26
- VALVE 21
- PROBE 18
- UNKNOWN 16
- SENSOR 15
- TRANSFER VALVE 14
- NONE 13
- FUEL CAP 13
- COMPUTER 12
- TRANSFER SYS 12
- SELECTOR 8
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).