# SDR ASAA2017042920567

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2017
- Submitted: May 1, 2017
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 6,636 hours, 2,267 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 007225
- Condition: Failed
- Location: E&E Bay
- Part time: 13,556 hours, 4,541 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017042920567

## Discrepancy

LEFT FMC FAILED 4 TIMES IN A 5 MIN PERIOD ( VTK AND LOSS OF MAP) AFTER 5 MINUTES IT RETURNED TO NORMAL OPS. FL 380, RIGHT AT TOUCH, LEFT FMC FAILED AGAIN, AND RETURNED AFTER ABOUT 1 MINUTE. GROUNDED - YES. REMOVED AND REPLACED LEFT FMC COMPUTER. SOFTWARE LOAD COMPLETE AND INSTALLATION TESTS ACCOMPLISHED PER AMM 34-61-02. THIS CLEARS MEL 34-36J.

---
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.