2,828 Flight Controls (ATA 27) service difficulty reports for the Boeing 737 (all variants)1.1% of all reported difficulties.

Most reported components

  • SENSOR 380
  • TRANSMITTER 371
  • FLAP SYSTEM 175
  • ACTUATOR 163
  • MOTOR 139
  • FSEU 134
  • INDICATOR 106
  • PROXIMITY SENSOR 101
  • UNKNOWN 96
  • TRIM MOTOR 86
  • FLAP 66
  • SWITCH 50
  • CONNECTOR 48
  • BUSHING 36
  • WARNING SYSTEM 33

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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