1,749 Fire Protection (ATA 26) service difficulty reports for the Boeing 737 (all variants) — 0.7% of all reported difficulties.
Most reported components
- SMOKE DETECTOR 367
- WIRE HARNESS 182
- FIRE DETECTOR 173
- FIRE LOOP 110
- UNKNOWN 91
- CONTROL PANEL 58
- DETECTOR 57
- MODULE 54
- OVERHEAT SENSOR 54
- TERMINAL 51
- CONNECTOR 44
- FIRE WARNING 40
- OVERHEAT LOOP 40
- WARNING LIGHT 35
- HARNESS 32
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).