What was found
LEFT ISOLATION VALVE MESSAGE ILLUMINATED. ASSOCIATED BLEED ISOLATION VALVE EICAS MESSAGE NOT DISPLAYED. INTERMITTENT AT CRUISE ALTITUDE. REMOVED AND REPLACED LT ISOLATION VALVE IAW AMM, OPS CHECKED GOOD.
- Difficulty date
- October 6, 2011
- Submitted
- October 13, 2011
- Operation
- Air carrier
- Aircraft
- N668UA
- Make and model
- Boeing 767322
- Aircraft serial
- 30024
- Aircraft time
- 44,801 hours, 11,934 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Isolation Valve
- Part number
- 2780539107
- Part serial
- 2467
- Condition
- Failed
- Location
- Left
- Stage of operation
- CR
- 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.