734 Auxiliary Power Unit (APU) (ATA 49) service difficulty reports for the Airbus A319 — 1.5% of all reported difficulties.
Most reported components
- APU 389
- OIL SYSTEM 52
- O-RING 34
- COOLING FAN 30
- SEAL 18
- PACKING 17
- UNKNOWN 16
- OIL COOLER 15
- INLET 11
- LINE 9
- NONE 9
- PRESSURE SWITCH 7
- STARTER 6
- FCU 6
- PLENUM 6
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).