# SDR CALA2026041315286

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N16703](https://openairdocs.org/aircraft/N16703), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28764
- Aircraft time: 84,902 hours, 31,467 cycles
- System (JASC): [3500 · Oxygen System](https://openairdocs.org/jasc/3500)
- Part: Sensor
- Part number: 3522W000002
- Part serial: 4251
- Condition: Faulted
- Location: Oxygen Sys
- Part time: 30,009 hours, 12,413 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026041315286

## Discrepancy

NITROGEN GENERATION SYSTEM OPERABILITY INDICATOR DEGRADED (BLUE) LIGHT IS ON. BLUE LIGHT ON NITROGEN GENERATOR.   PERFORMED ELECTRICAL TEST FAILED OXYGEN SENSOR MESSAGE 47-30062 REF FIM 47-31-TASK 838,  CHECKED UNIT, FOUND NO FUEL SMELL REPLACED OXYGEN SENSOR IAW AMM 47-42-03, PASSED TEST LIGHT IS NOW GREEN OK FOR CONT, SERVICE REMOVED FROM MEL.

---
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.