# SDR WRLA200217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2002
- Submitted: October 21, 2002
- Operation: Air carrier
- Aircraft: N304WL
- Make and model: Doug DC-10-30F
- Registry model: [Doug DC-10-30F](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f) (OpenAirDocs)
- Aircraft serial: 47928
- Engine: Ge CF650C2
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Sensor
- Part number: 47327
- Condition: Erratic
- Location: Nr 1 Eng N1
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WRLA200217

## Discrepancy

ENGINE FAIL CAUTION LIGHT ILLUMINATED DURING TAKE OFF DUE TO NR 1 ENGINE N1 TACH GIVING ERRATIC INDICATIONS.  (REJECTED TAKE OFF AT 70 KNOTS.)  REMOVED AND REPLACED NR 1 ENGINE FAN SPEED SENSOR ,  RAN ENGINE NR 1 UP TO 85 PERCENT NR 2, FOUND NO ERRATIC FLUCTUATION ON N2 INDICATOR, BOTH NR 1 AND NR 2 STABILIZED ON INDICATORS.  OPS CHECK NORMAL.

---
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.