# SDR ASAA2020101433359

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2020
- Submitted: October 16, 2020
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 50,762 hours, 15,172 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 002348
- Condition: Faulty
- Location: Left
- Part time: 48,882 hours, 14,701 cycles
- Stage of operation: TX
- 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/ASAA2020101433359

## Discrepancy

AFTER CLEARING RUNWAY LEFT FMC BEGAIN CYCLING BETWEEN VTK AND NORMAL INDICATIONS.  THE FMC IS STILL CYCLING WHILE SITTING HERE AT THE GATE.  GROUNDED-YES.  VERIFIED FAULT, OPEN 2 C/B'S & INST 2 MIG51A'S.  REPLACED LT FMC WITH SERVICEABLE ONE.  CLOSED 2 C/B'S & REMOVED 2 MIG51A'S ACCOMPLISHED FMC DATA CROSS LOAD RT TO LT.  APPLIED PERFORMANCE FACTORS & FMC OPERATIONS TEST, TEST PASS, REF B737-800 M/M 34-61-02-400-801, 34-61-00-800-801, & 34-61-00-710-801.   SEA/MC NOTIFIED RAY.

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