What was found
NR 4 HYD SYS LOST ALL FLUID, SYS INOP. FOUND HYD LEAK FROM NR 4 EDP BODY. REPLACED NR 4 HYD PUMP PER MM 29-11-05 & REPLACED CASE DRAIN & PRESS FILTERS PER MM 29-11-00. LEAK CHECK & OPS OK. HYD PWR INSP PER MM 29-00-00 OK.
- Difficulty date
- July 31, 2006
- Submitted
- July 31, 2006
- Operation
- Air carrier
- Aircraft
- N523UP
- Make and model
- Boeing 747200
- Aircraft serial
- 22381
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Pump
- Condition
- Leaking
- Location
- Hyd System
- Stage of operation
- AP
- How discovered
- O
- Nature of condition
- K, J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.