What was found
FLT ALT WINDOW ON PRESSURIZATION CONTROLLER ONLY SCROLLS BETWEEN 34000 AND 34500. GROUNDED - YES. TAPPED ON PRESSURIZATION CONTROLLER SELECTOR, ALT WINDOW SELECTS NORMAL. OPS NORMAL REF AMM 21-31-00.
- Difficulty date
- February 16, 2019
- Submitted
- February 20, 2019
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 21,199 hours, 6,982 cycles
- System (JASC)
- 2131 · Cabin Pressure Controller
- Part
- Selector
- Condition
- Malfunctioned
- Location
- Cockpit
- 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.