99 Indicating & Recording (ATA 31) service difficulty reports for the Boeing 747 — 0.4% of all reported difficulties.
Most reported components
- WARNING MESSAGE 22
- DISPLAY 18
- WARNING SYSTEM 13
- WARNING LIGHT 8
- PDU 4
- CDU 4
- CIRCUIT CARD 3
- EICAS 2
- CLOCK 2
- EIU 2
- INTERFACE UNIT 2
- WARNING SYST 1
- COMPUTER 1
- UNKNOWN 1
- CONTROL UNIT 1
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).