What was found
LEFT BLEED ISOLATION VALVE NOT IN COMMANDED POSITION. BLEED ISOLATION VALVE LOOKS NORMAL ON AIR DISPLAY MSG-3610280 LATCHED PO MODE VALVE IN CLOSED POSITION. REPLACED LEFT ISOLATION VALVE. OPS OK.
- Difficulty date
- May 16, 2010
- Submitted
- May 17, 2010
- Operation
- Air carrier
- Aircraft
- N220UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30223
- Aircraft time
- 37,339 hours, 4,630 cycles
- Engine
- Pwa PW4090
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Isolation Valve
- Part number
- 32907706
- Part serial
- 122
- Condition
- Malfunctioned
- Location
- Left
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.