# SDR O2JA2019013100000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2019
- Submitted: January 31, 2019
- Operation: Air carrier
- Aircraft: N131AJ
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 381
- Aircraft time: 19,641 hours, 12,649 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: AA
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/O2JA2019013100000

## Discrepancy

WHILE CLIMBING TO ALTITUDE THE CABIN ALT WAS STILL CLIMBING AT 700 FT/MIN.  LEVELED ALT AT 390 & THIS SHOWED NO CHANGE IN CABIN ALT, TRIED TO CHERRY PICK THE CABIN DOWN WHICH ALT HAD NO EFFECT. FL350 WAS THE LOWEST ATC COULD ASSIGN US SO WE STARTED A DESCENT, ONCE AT 350, THE CABIN LIGHT CAME ON (THE CABIN WAS STILL CLIMBING).  STARTED EMERGENCY DESCENT. ALL CREW ARRIVED SAFELY BACK TO BASE.

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