# SDR USAABB00074

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2000
- Submitted: August 14, 2000
- Operation: Air carrier
- Aircraft: [N647US](https://openairdocs.org/aircraft/N647US), registered now
- Make and model: Boeing 767201
- Aircraft serial: 23899
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 4052500962
- Condition: Faulty
- Location: E/E Bay
- Part time: 24,615 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAABB00074

## Discrepancy

PHL - FLT 2 - EN ROUTE PHL/FCO, CREW NOTED THE LOSS OF BOTH FMC''S.  CYCLING THE CIRCUIT BREAKERS BROUGHT THE FMC''S BACK ON-LINE, HOWEVER, THE CREW DECIDED NOT TO CONTINUE THE FLIGHT.  FLIGHT RETURNED TO PHL, AND LANDED WITHOUT FURTHER INCIDENT.  MAINTENANCE REPLACED BOTH FMC''S.  (X)

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