849 Auxiliary Power Unit (APU) (ATA 49) service difficulty reports for the Airbus A320 (all variants) — 1.4% of all reported difficulties.
Most reported components
- APU 343
- OIL SYSTEM 105
- OIL COOLER 35
- COOLING FAN 31
- INLET 24
- O-RING 19
- UNKNOWN 18
- LINE 15
- PACKING 14
- PRESSURE SWITCH 12
- ACTUATOR 11
- BLEED AIR SYS 11
- SEAL 10
- NONE 10
- PLENUM 9
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).