290 Engine Oil (ATA 79) service difficulty reports for the Boeing 737 (all variants) — 0.1% of all reported difficulties.
Most reported components
- TRANSMITTER 42
- LUBRICATION UNIT 22
- HEAT EXCHANGER 18
- PACKING 17
- SENSOR 16
- UNKNOWN 15
- OIL SYSTEM 15
- ENGINE 13
- FILTER 11
- O-RING 9
- OIL COOLER 8
- OIL FILTER 6
- EXCHANGER 6
- PRESSURE SWITCH 5
- WARNING MESSAGE 5
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).