# SDR ASAA2018011523164

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2018
- Submitted: January 17, 2018
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 19,237 hours, 6,334 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 007705
- Condition: Intermittent
- Location: Left
- Part time: 19,234 hours, 6,333 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018011523164

## Discrepancy

DURING CRUISE FLIGHT, LEFT SIDE FMC INTERMITTANT VTK.  ACFT GROUNDED.  CREW REPORTED LEFT FMC OPERATED INTERMITTANT SEVERAL TIMES.  REMOVED AND REPLACED THE LEFT FMC COMPUTER IAW AMM 34-61-02.  PERFORMED INSTALL TEST STEP E. CROSSLOADED ALL SWITCHES FROM RT SIDE FMC.   ADJUSTED PERFORMANCE FACTOR IAW AMM 34-61-00.  FMC OPS TESTED IAW AMM 34-61-00. SYS CHECKED NORMAL. NO HISTORY.

---
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.