What was found
RETURNED TO FIELD DUE TO LOSS OF THE B-SYSTEM HYDRAULICS. *S/D* FOUND B-SYSTEM RESERVOIR CHECK VALVE FAILED AND RESTRICTING FLOW. REPLACED BOTH RESERVOIR CHECK VALVES. SERVICED HYDRAULICS TO FULL AND LEAKED CHECKED GOOD.
- Difficulty date
- February 20, 2001
- Submitted
- March 7, 2001
- Operation
- Air carrier
- Aircraft
- N996UA
- Make and model
- Boeing 737291
- Aircraft serial
- 22456
- Aircraft time
- 52,900 hours, 39,930 cycles
- Engine
- Pwa JT8D17
- System (JASC)
- 2916 · Hydraulic Reservoir, Main
- Part
- Check Valve
- Part number
- 3111794
- Condition
- Restricted
- Location
- Reservoir
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.