802 Engine Indicating (ATA 77) service difficulty reports for the Boeing 737 (all variants) — 0.3% of all reported difficulties.
Most reported components
- PROBE 208
- UNKNOWN 106
- SENSOR 76
- WIRE HARNESS 74
- CONNECTOR 55
- FAULT CODE 51
- WARNING MESSAGE 44
- ENGINE 39
- EGT INDICATION 34
- WARNING LIGHT 17
- THERMOCOUPLE 16
- INDICATION SYS 12
- WARNING SYSTEM 10
- FAULT MESSAGE 10
- MONITOR 7
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).