# SDR AALA202610109708

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2026
- Submitted: October 11, 2026
- Operation: Air carrier
- Aircraft: [N746UW](https://openairdocs.org/aircraft/N746UW), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1297
- Aircraft time: 66,294 hours, 41,712 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Heat Exchanger
- Condition: Damaged
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202610109708

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO THE FLIGHT CREW REPORTING THAT CABIN PRESSURE CLIMBED OUT OF RANGE DURING CLIMB THROUGH 35000 FT - CABIN PRESSURE RETURNED TO LIMITS WHEN AIRCRAFT DESCENDED BELOW 30000 FT AND PACK FLOW SWITCH IN HIGH - CABIN SEEMS TO CLIMB WHENEVER PACK FLOW SWITCH IS NOT IN HIGH.  (OPEN)

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