# SDR DXTA200702503

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2007
- Submitted: October 8, 2007
- Operation: Air carrier
- Aircraft: [N949QS](https://openairdocs.org/aircraft/N949QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500049
- Aircraft time: 8,728 hours, 5,545 cycles
- Engine: Allsn AE3007C
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Pressure Switch
- Part number: 1103P0912
- Part serial: 0822
- Condition: Failed
- Location: Aft Service Bay
- Part time: 2,044 hours, 1,225 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200702503

## Discrepancy

ON TAKEOFF, GOT AN AMBER HP DUCT OVER PRESS R CAS MESSAGE, ABORTED TAKEOFF AND RAN CHECKLIST, CAS MESSAGE REMAINED ON AFTER SHUTDOWN.  TROUBLESHOT "RT HP. DUCT OVER PRESSURE" EICAS MSG, FOUND RT DUCT OVER PRESSURE. PRESSURE SWITCH FAILED.   REMOVED & REPLACED WITH A NEW UNIT PER CE-750 M/M. CH. 36-11-00.

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