# SDR I5EA2021032900012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2021
- Submitted: March 29, 2021
- Operation: Air carrier
- Aircraft: [N438US](https://openairdocs.org/aircraft/N438US), registered now
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24560
- Aircraft time: 66,902 hours, 44,647 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Message
- Condition: Illuminated
- Location: Cabin Pressure
- 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/I5EA2021032900012

## Discrepancy

CABIN ALTITUDE WARNING LIGHT AND HORN SOUNDED AT 37,000 FEET.  CABIN OBSERVED ABOVE 10,000 FEET AND CLIMBING.  EMERGENCY DESCENT EXECUTED AND QRH MEMORY ITEMS AND QRH PROCEDURES COMPLETED.  PASSENGER OXYGEN MASKS MANUALLY DEPLOYES BY FLIGHT CREW.

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