3,793 Air Conditioning (ATA 21) service difficulty reports for the Boeing 767 — 5.5% of all reported difficulties.
Most reported components
- UNKNOWN 430
- FAN 322
- CONTROLLER 315
- WARNING MESSAGE 311
- VALVE 193
- CONTROL VALVE 171
- WARNING SYSTEM 170
- A/C PACK 166
- SENSOR 108
- CONNECTOR 94
- STATUS MESSAGE 89
- ACTUATOR 88
- NONE 77
- WARNING LIGHT 66
- OUTFLOW VALVE 65
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).