Airbus A321 (all variants) Auxiliary Power Unit (APU): Service Difficulty Reports

562 reports (1.5% of Airbus A321 (all variants) reports)

562 Auxiliary Power Unit (APU) (ATA 49) service difficulty reports for the Airbus A321 (all variants) — 1.5% of all reported difficulties.

Most reported components

  • APU 259
  • OIL SYSTEM 44
  • O-RING 25
  • COOLING FAN 15
  • UNKNOWN 14
  • PRESSURE SWITCH 13
  • NONE 12
  • EXCITER 11
  • FCU 9
  • FUEL CONTROL 8
  • OIL COOLER 8
  • IGNITER 8
  • PACKING 7
  • CONTROL VALVE 7
  • PUMP 7

Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).

← All Airbus A321 (all variants) systems

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