# SDR HALA2013122500181

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2013
- Submitted: December 26, 2013
- Operation: Air carrier
- Aircraft: [N589HA](https://openairdocs.org/aircraft/N589HA), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 33422
- Aircraft time: 43,875 hours, 7,882 cycles
- Engine: Pwa PW4060
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Fmu
- Part number: 8010003
- Part serial: F27471
- Condition: Failed
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA2013122500181

## Discrepancy

RIGHT ENGINE N1 VARIES INLFIGHT DURING CRUISE.  N1 CONTINUALLY OSCILLATES .5 PERCENT AT CONSTANT THROTTLE SETTING.  RT ENGINE EPR CHANGES IN RELATION TO N1 CHANGES.  REMOVED NR 2 ENGINE FMU, REF AMM 73-21-01.  INSTALLED SERVICEABLE FMU ON NR 2 ENG IAW AMM 73-21-01. OPS & LEAK CHECK, OK.  PENDING HIGH POWER RUN.  OPS CHEKED GOOD ON HIGH POWER RUN UP.

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