33 Water & Waste (ATA 38) service difficulty reports for the Boeing 747 — 0.1% of all reported difficulties.
Most reported components
- COMPRESSOR 6
- TOILET 5
- LAVATORY 4
- HOSE 2
- LINE 2
- HEATING ELEMENT 1
- COOLER 1
- PRESSURE SWITCH 1
- TANK 1
- MODULE 1
- PACKING 1
- WATER HEATER 1
- POTABLE WATER 1
- HEATER 1
- DUCT 1
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).