# SDR VNAA2025072211103

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2025
- Submitted: July 22, 2025
- Operation: Air carrier
- Aircraft: [N636NN](https://openairdocs.org/aircraft/N636NN), registered now
- Make and model: Cndair CL6002D24
- Aircraft serial: 15399
- Aircraft time: 13,633 hours, 14,215 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: GG670980029
- Part serial: 774286IN01796
- Condition: Unserviceable
- Location: Zone 100
- Part time: 13,633 hours, 14,215 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/VNAA2025072211103

## Discrepancy

CABIN ALT CAUTION MSG AT FL 340 CABIN ALT 8200FT FA REPORTED LOUD WHISTLING FROM AFT GALLEY.  REMOVED AND REPLACED CPC2 IAW AMM 21-31-04-000/400-801. OPS CHECK GOOD.

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