# SDR 3EJA835JS041226

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 12, 2026
- Submitted: July 13, 2026
- Operation: Air carrier
- Aircraft: [N835JS](https://openairdocs.org/aircraft/N835JS), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605813
- Aircraft time: 9,210 hours, 5,705 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 1988003
- Part serial: 2815
- Condition: Failed
- Location: Zone 200
- Part time: 348 hours, 198 cycles
- Stage of operation: CL
- 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/3EJA835JS041226

## Discrepancy

ON TAKEOFF CLIMB PRESS FLUCTUATIONS UP TO 4300 ON THE RATE AND BACK DOWN  AND BACK UP AGIN ACCOMPANIED WITH A ACM OVERHEAT: REMOVED AND REPLACED LH BILEVEL VALVE IAW AMM 21-11-00.  OPS & LEAK CHECKED GOOD.

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