What was found
LEFT ENGINE BLEED FAN AIR MODULATING VALVE FAILED OPEN OR CLOSED OR LEFT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE.
- Difficulty date
- July 10, 2013
- Submitted
- July 12, 2013
- Operation
- Air carrier
- Aircraft
- N792UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26934
- Aircraft time
- 71,184 hours, 10,054 cycles
- Engine
- Pwa PW4090
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Unknown
- Condition
- Unknown
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.