What was found
RIGHT MIX VALVE STUCK IN FULL COLD POSITION IN MANUAL AND AUTO SELECTIONS. *S/D* RIGHT HAND MIX VALVE FAILED IN THE FULL COLD POSITION. REPLACED THE RIGHT HAND MIX VALVE ASSEMBLY, CHECKS GOOD.
- Difficulty date
- January 11, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N989UA
- Make and model
- Boeing 737291
- Aircraft serial
- 21751
- Engine
- Pwa JT8D17
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Valve
- Condition
- Failed
- Location
- Right
- Component
- Allied Signa · 39811611
- Stage of operation
- NR
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.