815 Engine Air (ATA 75) service difficulty reports for the Boeing 737 (all variants) — 0.3% of all reported difficulties.
Most reported components
- ACTUATOR 184
- ANTI-ICE VALVE 121
- BLEED VALVE 112
- UNKNOWN 78
- VALVE 75
- REGULATOR 34
- SHUTOFF VALVE 15
- SENSOR 12
- CONTROL VALVE 12
- CONNECTOR 12
- WARNING LIGHT 9
- ENGINE 9
- WIRE HARNESS 8
- WARNING SYSTEM 8
- BLEED AIR SYS 7
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).