# SDR ASAA2021011433887

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2021
- Submitted: January 20, 2021
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36361
- Aircraft time: 24,936 hours, 8,062 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 001937
- Condition: Failed
- Location: Right
- Part time: 56 hours, 16 cycles
- Stage of operation: NR
- 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/ASAA2021011433887

## Discrepancy

RIGHT FMC FAILED.  VTK FLAG AND MAP FLAG ON F/O SIDE.  GROUNDED-YES.  PERFORMED BITE OF FMC NR 1 AND NR 2, REF B737-900 AMM 34-61 TASK 801.  FOUND NR 2 FMC HARDWARE FAULTS ETHERNET AND PROCESSOR.  REPLACED NR 2 FMC WITH SERVICEABLE FROM STOCK, REF AMM 34-61-02-000-801/400-801.  ALL TEST PASS FAULT NO LONGER EXISTS.

---
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.