# SDR SCNA99509

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N154SY](https://openairdocs.org/aircraft/N154SY), registered now
- Make and model: Doug DC-10-15
- Registry model: [Doug DC-10-15](https://openairdocs.org/model/mcdonnell-douglas-dc-10-15) (OpenAirDocs)
- Aircraft serial: 48259
- System (JASC): [2134 · Cabin Pressure Sensor](https://openairdocs.org/jasc/2134)
- Part: Switch
- Part number: 1194P005005
- Condition: Failed
- Location: Cabin
- Stage of operation: IN
- Nature of condition: P
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SCNA99509

## Discrepancy

DURING A HEAVY MAINTENANCE VISIT, DURING COMPLETION OF A CABIN LEAK CHECK THE ALTITUDE WARNING HORN FAILED TO GO OFF WHEN THE CABIN ALTITUDE REACHED 12,000 FT.  REMOVED AND REPLACED THE CABIN ALTITUDE SWITCH AND THE SYSTEM OPERATIONALLY CHECKS GOOD IAW DC10 MM 213303.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.