69 Standard Practices - Structures (ATA 51) service difficulty reports for the Boeing 747 — 0.3% of all reported difficulties.
Most reported components
- NONE 20
- ELEVATOR 10
- UNKNOWN 7
- FLOORBEAM 4
- DOUBLER 4
- STRINGER 4
- SKIN 3
- STRUCTURE 3
- NOT REPORTED 3
- PANEL 2
- RIB 2
- SPAR 2
- SUPPORT 1
- TRANSFER SYS 1
- LIGHT 1
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).