62 Engine Oil (ATA 79) service difficulty reports for the Boeing 777 (all variants) — 0.2% of all reported difficulties.
Most reported components
- PRESSURE SWITCH 12
- OIL COOLER 5
- HEAT EXCHANGER 5
- SENSOR 4
- INDICATION SYS 4
- WARNING SYSTEM 3
- OIL SYSTEM 3
- TRANSMITTER 3
- PUMP 2
- O-RING 2
- LINE 2
- ENGINE 2
- NONE 2
- WARNING LIGHT 1
- UNKNOWN 1
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).