What was found
PRESSURIZATION VALVE WENT TO FULL CLOSED. THE ONLY WAY TO CONTROL CABIN WAS TO USE MANUAL CONTROL WITH PACKS OFF. AN EMERGENCY WAS NOT DECLARED, LANDED UNEVENTFULLY. REPLACED CABIN PRESSURE AUTO/MANUAL SWITCH IAW AMM 21-32-05.
- Difficulty date
- March 8, 2015
- Submitted
- March 18, 2015
- Operation
- Air carrier
- Aircraft
- N559AA
- Make and model
- Doug DC982
- Aircraft serial
- 53089
- Aircraft time
- 67,717 hours, 35,160 cycles
- System (JASC)
- 2130 · Cabin Pressure Control System
- Part
- Switch
- Part number
- RC11540
- Condition
- Failed
- Location
- Cabin Pressure
- Stage of operation
- CR
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.