# SDR ASAA2017051120741

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2017
- Submitted: May 18, 2017
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 14,203 hours, 4,694 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7710 · Power Indicating System](https://openairdocs.org/jasc/7710)
- Part: Sensor
- Part number: 3218KGB01
- Part serial: YJ418237
- Condition: Intermittent
- Location: Eng N1 Speed
- Part time: 14,266 hours, 4,715 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017051120741

## Discrepancy

NR 2 ENGINE ACMS DATA SHOWS INTERMITTENT N2 VALUES FROM OIP REPORT 7.  TAKEOFF AND CRUISE ACMS REPORTS SHOW NORMAL PARAMETERS.  ACFT GROUNDED.   REPLACED THE N2 SPEED SENSOR ON THE NR 2 ENGINE IAW AMM 77-11-01.  ENGINE IDLE LEAK CHECKED GOOD AND BITE CHECK SHOWED NO FAULTS.

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