# SDR AALA2020031279007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2020
- Submitted: March 12, 2020
- Operation: Air carrier
- Aircraft: [N939AN](https://openairdocs.org/aircraft/N939AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30083
- Aircraft time: 57,601 hours, 23,981 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2193301AD
- Part serial: 1360321
- Condition: Defective
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2020031279007

## Discrepancy

AIRCRAFT WAS GROUNDED: PRESSURIZATION CONTROL PANEL FLT ALT IS STUCK AT 21,000.  WILL NOT ADJUST. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202003079006) AND #2 (AALA202003079007 )PER AMM 21-31-00. ALSO REPLACED CABIN PRESSURE CONTROL MODULE IN OVERHEAD PANEL (AALA202003079008) PER AMM 21-31-00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.