# SDR AALA202509300343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2025
- Submitted: September 30, 2025
- Operation: Air carrier
- Aircraft: [N344TS](https://openairdocs.org/aircraft/N344TS), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44491
- Aircraft time: 4,295 hours, 1,610 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Indicator
- Part number: 171360000
- Part serial: TM224517
- Condition: Inoperative
- Location: Zone 200
- Part time: 4,294 hours, 1,610 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: P
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202509300343

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: CABIN PRESSURIZATION WOULD NOT PRESSURIZE DURING CLIMB. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. PERFORMED BITE TESTS TO BOTH CABIN PRESSURE CONTROL 1 AND 2 NO FAULTS NOTED PER AMM 21-31-00. PERFORMED CABIN PRESSURIZATION TEST AND ALL INDICATIONS WERE NORMAL PER AMM 21-31-00. CHANGED CABIN RATE OF CLIMB INDICATOR PER AMM 21-33-01. OPERATIONAL CHECK NORMAL.

---
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.