# SDR SIMA952071

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N266AT](https://openairdocs.org/aircraft/N266AT), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 266
- Engine: Pwa PW120
- System (JASC): [7530 · Compressor Bleed Control](https://openairdocs.org/jasc/7530)
- Part: Switching Valve
- Part number: 310848501
- Condition: Sticking
- Location: Lt Eng
- Stage of operation: TX
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA952071

## Discrepancy

MKG - FLT NR 4108 - ELECTRICAL SMOKE LIGHT ILLUMINATED DURING TAXI.  SMOKE SMELL WAS PRESENT IN THE COCKPIT AND CABIN. AIRCRAFT RETURNED TO GATE WITH NO INCIDENT.  MAINTENANCE FOUND NR 1 ENG P.2.5/P.30 SWITCHING VALVE STUCK IN P3.0 POSITION.  SWITCHING VALVE WAS REPLACED.  SYSTEM OPERATIONS CHECKED GOOD.  AIRCRAFT WAS RETURNED TO SERVICE.  (M)

---
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.