# SDR CA021129003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2002
- Submitted: January 6, 2003
- Operation: Air carrier
- Make and model: Boeing 737-2L9
- Registry model: [Boeing 737-2L9](https://openairdocs.org/model/boeing-737-2l9) (OpenAirDocs)
- Aircraft time: 56,814 hours
- Engine: Pwa JT8D17A
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Servo
- Part number: WL1103AMMS10
- Condition: Malfunctioned
- Location: Altimeter
- 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/CA021129003

## Discrepancy

(CAN) CRUISING FL310, AURAL WARNING FOR PRESSURIZATION SOUNDED, OVERHEAD MASTER CAUTION ILLUMINATED.INITIATED EMERG. DESCENT, PRESSURIZATION CONTROLLED MANUALLY BUT NOT BEFORE MASKS IN CABIN DROPPED. EMERG. DESCENT & RAPID DEPRESSURIZATION CHECKLIST COMPLETED.

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