49,810 Lights (ATA 33) service difficulty reports for the Boeing 737 (all variants) — 18.9% of all reported difficulties.
Most reported components
- BATTERY PACK 11,717
- LIGHT 10,689
- LENS 7,232
- COVER 4,170
- SIGN 3,017
- BATTERY 2,670
- LAMP 2,333
- POWER SUPPLY 1,587
- CONNECTOR 828
- BULB 777
- CHARGER 769
- FUSE 619
- WIRE 583
- UNKNOWN 264
- NONE 258
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).