What was found
HYD FLUID RUNNING LEAK FROM NR 4 PYLON AREA DURING PRESSURIZE HYD SYSTEM FOR DEPARTURE. FOUND HYD LEAK FROM NR 4 AC PUMP LINE. REPLACED NR 4 AC HYD PUMP RETURN LINE. OPS & LEAK CHECKED GOOD.
- Difficulty date
- February 27, 2011
- Submitted
- March 14, 2011
- Operation
- Air carrier
- Aircraft
- N180UA
- Make and model
- Boeing 747422
- Aircraft serial
- 25224
- Aircraft time
- 83,363 hours, 10,054 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- Line
- Part number
- AS115100192
- Condition
- Leaking
- Location
- Hyd System
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- K
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.