What was found
ON TAXI OUT HAD FLAP PRIMARY FAIL PRIMARY (HYDRAULIC FLAP DRIVE FAILURE). *S/D* SUSPECT FAULTY FLAP PRIMARY CONTROL VALVE. REPLACED VALVE, OP CHECK GOOD. AC OK FOR SERVICE.
- Difficulty date
- July 30, 2008
- Submitted
- August 21, 2008
- Operation
- Air carrier
- Aircraft
- N794UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26953
- Aircraft time
- 48,164 hours, 7,119 cycles
- Engine
- Pwa PW40903
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- Control Valve
- Part number
- 3930021102
- Condition
- Faulty
- Location
- Hyd System
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- D
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.