# SDR 1013041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2004
- Submitted: December 8, 2004
- Operation: Air carrier
- Aircraft: N67HB
- Make and model: Lear 25B
- Registry model: [Lear 25B](https://openairdocs.org/model/gates-lear-jet-25b) (OpenAirDocs)
- Aircraft serial: 189
- Engine: Ge CJ6101
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Module
- Part number: 241420027603
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 9,188 hours
- Stage of operation: NR
- 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/1013041

## Discrepancy

ON A FLIGHT, THE FLIGHT CREW NOTICED THAT THE PRESSURIZATION SYSTEM WAS NOT INCREASING CABIN PRESSURE AT A RATE TYPICAL TO NORMAL AIRCRAFT OPERATION.  AT 17,000 FT, WITH A CABIN ALTITUDE LOWER THAN THEY WERE USE TO SEEING, THE FLIGHT CREW DECIDED TO RETURN, LANDED WITHOUT INCIDENT.  PRESSURIZATION CONTROL MODULE SUSPECTED TO BE FAULTY.

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