592 Hydraulic Power (ATA 29) service difficulty reports for the Boeing 727 — 1.1% of all reported difficulties.
Most reported components
- LINE 113
- PUMP 63
- HYDRAULIC LINE 54
- HOSE 37
- HYD LINE 36
- HYD PUMP 24
- VALVE 18
- HYDRAULIC SYSTEM 15
- O-RING 13
- TUBE 12
- B-NUT 10
- MODULE 10
- CHECK VALVE 9
- HYDRAULIC PUMP 8
- HYD FLUID 7
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).