887 Hydraulic Power (ATA 29) service difficulty reports for the Boeing 737 (all variants)0.3% of all reported difficulties.

Most reported components

  • PUMP 339
  • HYDRAULIC LINE 55
  • HYDRAULIC SYSTEM 51
  • FILTER 44
  • LINE 43
  • MODULE 29
  • O-RING 28
  • HOSE 25
  • TRANSMITTER 22
  • CONNECTOR 18
  • UNKNOWN 17
  • PRESSURE SWITCH 13
  • RESERVOIR 13
  • PACKING 12
  • FUSE 10

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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