What was found
LEFT HYD SYS INOPERATIVE, RETURNED TO FIELD. LOW QUANTITY. REPLACED LE SLAT BYPASS VALVE. FOUND O-RING ON FITTING DESTROYED. SERVICED HYD TO FULL CYCLED ALL FLIGHTS CONTROLS, NO LEAKS NOTED.
- Difficulty date
- December 22, 2011
- Submitted
- January 3, 2012
- Operation
- Air carrier
- Aircraft
- N520UA
- Make and model
- Boeing 757222
- Aircraft serial
- 24890
- Aircraft time
- 69,530 hours, 26,097 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- O-Ring
- Condition
- Failed
- Location
- Hyd System
- Stage of operation
- CL
- How discovered
- O
- 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.