What was found
LOSS OF LEFT HYDRAULIC SYSTEM. LOST ALL HYDRAULIC FLUID ON LEFT SIDE. THE CAUSE OF THIS FAILURE WAS A SHEARED SHAFT, WHICH CAUSED THE PUMP TO SEIZE AND CRACK THE CASE. THE PUMP WAS REPLACED.
- Difficulty date
- September 14, 2003
- Submitted
- October 14, 2003
- Operation
- Air carrier
- Aircraft
- N539UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25223
- Aircraft time
- 41,151 hours, 15,057 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Shaft
- Condition
- Sheared
- Location
- Hyd Pump
- Stage of operation
- CR
- How discovered
- 9
- Nature of condition
- K, J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.