# SDR G1IA20151124001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2015
- Submitted: November 25, 2015
- Operation: Air carrier
- Aircraft: N60WL
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 35382
- Aircraft time: 16,004 hours, 11,634 cycles
- Engine: Hnywl TFE73120
- System (JASC): [2132 · Cabin Pressure Indicator](https://openairdocs.org/jasc/2132)
- Part: Warning System
- Condition: Activated
- Location: Cockpit
- 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/G1IA20151124001

## Discrepancy

DEPARTED & EN ROUTE, APPROX 15 - 20 MINS AFTER LEVELING OFF AT FL 360 THE CABIN ALTITUDE WARNING ILLUMINATED.   DECLARED AN EMER & INITIATED AN EMER DESCENT & DIVERTED.  THE CABIN ALT. STAYED BELOW THE POINT OF O2 MASK ACTIVATION & ONCE THEY DESCENDED TO A SAFE ALTITUDE THEY OPERATED THE PRESSURIZATION IN MANUAL MODE WITH NORMAL OPERATION.  THE PRESSURIZATION AUTO MODE WAS MEL'D & THE ACFT REPOSITIONED FOR TROUBLESHOOTING.  WILL AMEND REPORT WITH FINDINGS.

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