243 Pneumatic (ATA 36) service difficulty reports for the Boeing 777 (all variants) — 0.9% of all reported difficulties.
Most reported components
- SHUTOFF VALVE 45
- CONTROLLER 37
- VALVE 33
- PRECOOLER 20
- ISOLATION VALVE 19
- DUCT 12
- SENSOR 11
- MODULATING VALVE 11
- CHECK VALVE 7
- CLAMP 4
- WARNING SYSTEM 4
- HEAT EXCHANGER 3
- SEAL 3
- UNKNOWN 3
- WARNING MESSAGE 3
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).