175 Electrical Power (ATA 24) service difficulty reports for the Boeing 747 — 0.6% of all reported difficulties.
Most reported components
- BATTERY 26
- WIRE 22
- CHARGER 22
- FEEDER CABLE 14
- GENERATOR 9
- IDG 9
- CONTROL UNIT 8
- RELAY 7
- CIRCUIT BREAKER 6
- GCU 5
- TERMINAL 3
- WIRE HARNESS 3
- UNKNOWN 3
- MOTOR 3
- CABLE 2
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).