# SDR ASAA2012070492469

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2012
- Submitted: July 10, 2012
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 18,092 hours, 5,757 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7710 · Power Indicating System](https://openairdocs.org/jasc/7710)
- Part: Sensor
- Part number: 3205490050
- Part serial: EM170296U
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Part time: 9,022 hours, 3,187 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2012070492469

## Discrepancy

NR 2 ENGINE VIBRATION INDICATION INTERMITTENTLY BLANKS NO INDICATION. ACFT GROUNDED.  AVM LOGGED MULTIPLE N2 RPM SIGNAL LOSS NR 1 AND NR 2 ALSO LOGGED MULTIPLE ENG 2 N2 SIGNAL LOSS MAINT MSG 31-63160.  R & R N2 SENSOR REF AMM 77-11-02, LEAK AND OPS CHECKED GOOD.

---
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.