# SDR 99UAL900583

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N389UA](https://openairdocs.org/aircraft/N389UA), registered now
- Make and model: Boeing 737322
- Aircraft serial: 24664
- Engine: Ge CFM56*
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Condition: Failed
- Location: Cockpit
- Component: Smith Indust, 1689250601
- Stage of operation: TO
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99UAL900583

## Discrepancy

ON TAKEOFF, ALL ENGINE FAN SPEED INDICATIONS WERE LOST ON THE FLIGHT MANAGEMENT COMPUTER.  *S/D*  REPLACED THE FLIGHT MANAGEMENT COMPUTER.  THE DIGITAL FLIGHT COMPUTER SYSTEM TESTED, OK.

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