What was found
HYD FLUID LEAK INSIDE NR 1 ENGINE PYLON. FOUND PIN HOLE AT TUBE ASSY RETURN SYS 1. REPLACED NEW TUBE ASSY & PER MM PRESSURE CHECKED. NO LEAK FOUND, FLIGHT CONTROL SURFACE OPERATION CHECKED NORMAL.
- Difficulty date
- September 30, 2011
- Submitted
- October 25, 2011
- Operation
- Air carrier
- Aircraft
- N181UA
- Make and model
- Boeing 747422
- Aircraft serial
- 25278
- Aircraft time
- 84,104 hours, 10,287 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- Tube
- Part number
- 65B01512377
- 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.