# SDR ASAA2016111218638

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 2016
- Submitted: November 14, 2016
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 15,812 hours, 5,053 cycles
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Sensor
- Part number: 3218KGB01
- Part serial: YJ416944
- Condition: Faulty
- Location: Nr 1 Engne
- Part time: 15,847 hours, 5,073 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016111218638

## Discrepancy

NR 1 ENGINE ACMS DATA SHOWS INTERMITTENT N2 VALUES FROM OIP REPORT 7. TAKEOFF AND CRUISE ACMS REPORTS SHOW NORMAL PARAMETERS. GROUNDED - YES. REMOVED & REPLACED NR 1 ENG N2 SENSOR REF AMM 77-11-02. OPS CK GOOD.

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