# SDR ASAA2024072051186

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2024
- Submitted: July 22, 2024
- Operation: Air carrier
- Aircraft: [N291BT](https://openairdocs.org/aircraft/N291BT), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44088
- Aircraft time: 11,429 hours, 3,229 cycles
- Engine: Cfmint LEAP1B28
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Pressure Switch
- Part number: 214C502
- Part serial: AC04139A
- Condition: No Test
- Location: Cabin Altitude
- Part time: 3,932 hours, 1,126 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2024072051186

## Discrepancy

ASSIGNED WO #2010108 T/C AD20222409-MULTI-21-2 CABIN ALTITUDE WARNING SWITCH S1153 TEST FAILED. GROUNDED - YES. REMOVED AND REPLACED CABIN ALTITUDE WARNING SWITCH S1153 IAW AMM 21-33-04. FUNCTIONAL TEST GOOD. NO DEFECTS AT THIS TIME.

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