# SDR ASAA2021050834773

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2021
- Submitted: May 10, 2021
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 26,851 hours, 8,613 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Faulted
- Location: Right
- 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/ASAA2021050834773

## Discrepancy

MOMENTARY (1 MINUTE ) VTK ON FO ND DISPLAY EITH LODD OF LNAV & VNAV AND "MAP" DISPLAYED. PROBLEM SELF CORRECTED IN ONE MINUTE. GROUNDED - YES. FOUND RIGHT FMC FAULT LOGGED AS "PRES POS LAT RATE" ACCOMPLISHED B737-900 FIM 34-61 TASK 824 'ADIRS INPUT PROBLEM' WITH NO CURRENT DISCREPANCIES - FMC BITE OK REF FIM 34-61 TASK 801.

---
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.