What was found
FLT ALT WINDOW IS INTERMITTENT. NOT ABLE TO CHANGE DISPLAYED WITH FLIGHT ALT KNOB. GROUNDED - YES. REMOVED AND REPLACED CABIN PRESSURE CONTROL MODULE PER AMM 21-31-02. OPS CHECKED NORMAL.
- Difficulty date
- October 8, 2018
- Submitted
- October 10, 2018
- Operation
- Air carrier
- Aircraft
- N531AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35199
- Aircraft time
- 32,725 hours, 9,693 cycles
- System (JASC)
- 2130 · Cabin Pressure Control System
- Part
- Control Module
- Part number
- 8243921002
- Part serial
- 99064308
- Condition
- Defective
- Location
- Cockpit
- Part time
- 65,880 hours, 25,698 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.