2,565 Auxiliary Power Unit (APU) (ATA 49) service difficulty reports for the Boeing 7673.7% of all reported difficulties.

Most reported components

  • APU 515
  • UNKNOWN 177
  • ECU 165
  • OIL SYSTEM 98
  • STARTER 95
  • NONE 78
  • WARNING SYSTEM 64
  • ACTUATOR 54
  • WARNING MESSAGE 54
  • VALVE 53
  • CONTROL VALVE 48
  • MODULE 44
  • ENGINE 43
  • DUCT 40
  • BLEED AIR SYS 38

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

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