# SDR SIMA952651

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N270AT](https://openairdocs.org/aircraft/N270AT), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 270
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Probe
- Part number: 3039242
- Condition: Broken
- Location: Nr 1 Engine
- Part time: 496 hours
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA952651

## Discrepancy

ORD - FLT NR 4043 - NR 1 ENGINE TQ SURGED FROM APPROXIMATELY 40-110 PERCENT, SURGE STOPPED WHEN NP WAS SET TO 100 PERCENT.  REPLACED NR 1 ENGINE NH SENSOR, IAW PWA MM, CHECK GOOD.  AIRCRAFT WAS RETURNED TO SERVICE.  (M0

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