What was found
CABIN TEMPERATURE UNCONTROLLABLE ON CLIMB OUT. AIRCRAFT RETURNED TO ORD, EMERGENCY DECLARED, LANDED WITHOUT INCIDENT. REPLACED RIGHT PACK TEMPERATURE CONTROL VALVE IAW AMM 21-51-10. OPS CHECKED GOOD. AIRCRAFT WAS GROUNDED.
- Difficulty date
- February 24, 2018
- Submitted
- March 2, 2018
- Operation
- Air carrier
- Aircraft
- N943NN
- Make and model
- Boeing 737823
- Aircraft serial
- 31177
- Aircraft time
- 14,069 hours, 5,078 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 20415
- Condition
- Faulty
- Location
- Rt A/C Pack
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- M, J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.