What was found
ON AIR SYS SCHEMATIC ZONE B SHOWS NO TEMP CTRL DISPLAYED MAGEN TA TRIM AIR ZONEB INOPERATIVE WITH ASSOCIATED ZONE. REPLACED ZONE B TRIM AIR MODULATING VALVE. SYSTEM TEST GOOD. LEAK CK GOOD.
- Difficulty date
- November 28, 2022
- Submitted
- November 28, 2022
- Operation
- Air carrier
- Aircraft
- N785UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26954
- Aircraft time
- 102,789 hours, 13,566 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Condition
- Faulty
- Location
- Cabin Air
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.