# SDR ASAA2012062492420

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2012
- Submitted: June 26, 2012
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 299 hours, 100 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7797 · Engine Indicating System Wiring](https://openairdocs.org/jasc/7797)
- Part: Connector
- Condition: Dirty
- Location: N2 Speed Sensor
- Part time: 299 hours, 100 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2012062492420

## Discrepancy

NR 2 ENGINE FAULT CODE 77-11132, THE N2 SPEED SENSOR SIGNALS DISAGREE, (SHORT TIME FAULT) APPEARED ON CDU.  ACFT GROUNDED. CLEANED CONNECTIONS DP1201, DP0503, DP0603 IAW WDM 77-12-21.  INSPECTED, CLEANED, & REASSEMBLED CONNECTORS REF SWPM 20-60-00. OPS CHECKED NORMAL IAW FIM 77-11-00-810-803-F00.

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