# SDR DXTA2023122610411

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2023
- Submitted: December 26, 2023
- Operation: Air carrier
- Aircraft: [N318QS](https://openairdocs.org/aircraft/N318QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500162
- Aircraft time: 8,713 hours, 6,942 cycles
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Modulating Valve
- Condition: Faulted
- Location: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2023122610411

## Discrepancy

DUCT 1 OVERTEMP YELLOW CAS MESSAGE ILLUMINATED IN FLIGHT WHILE ENTERING ICE CONDITIONS AT 9000 FEET.  THERE WAS A SMELL IN CABIN AS WELL AS  A TEMP RISE WHEN ANTI-ICE ON.   COMPLIED WITH QRH CHKLST &  ABLE TO GET CAS MESSAGE OUT.  APPLIED POWER. FOUND NO ACTIVE DUCT OVERTEMP CAS.PER MCC AND PREVIOUS TROUBLESHOOTING HISTORY,  REMOVED AND REPLACED TEMP SENSOR IAW AMM 21-61-04. OPS CHECK GOOD.  REMOVED & REPLACED TEMP MODULATION VALVE IAW AMM 21-61-02.  RAN BOTH ENGINES AND PERFORMED OPS & LEAK CHECKS WITH SATISFACTORY RESULT.

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