30 Engine Air (ATA 75) service difficulty reports for the Boeing 747 — 0.1% of all reported difficulties.
Most reported components
- ACTUATOR 5
- BLEED VALVE 4
- CONTROLLER 3
- DUCT 2
- MANIFOLD 2
- SWITCH 2
- LVDT 1
- LINE 1
- ROD END 1
- ARM 1
- TUBE 1
- SHUTOFF VALVE 1
- WIRE 1
- TRANSMITTER 1
- THERMAL SWITCH 1
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).