# SDR DALA2025061904617

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2025
- Submitted: June 19, 2025
- Operation: Air carrier
- Aircraft: [N830DN](https://openairdocs.org/aircraft/N830DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31940
- Aircraft time: 31,725 hours, 12,314 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Heat Exchanger
- Part number: 1828203
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025061904617

## Discrepancy

SHIP 3830 -PRESS- CREW REPORTED LOSS OF CABIN ALTITUDE ON DESCENT APPROX. 23K FEET. PERFORMED EMERGENCY DESCENT TO BELOW 10,000FT. CORRECTIVE ACTION: MAINTENANCE REPLACED BOTH RIGHT HEAT EXCHANGERS, RIGHT PACK ACM AND RIGHT FLOW CONTROL VALVE.

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