# SDR ASAA2022032137744

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2022
- Submitted: March 23, 2022
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 57,093 hours, 16,841 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022032137744

## Discrepancy

AT CRUISE, LH FMC FAILED. VTK ON CAPT, BOTH CDUS MISSING FMC PROMPT. IT LASTED ABOUT 1 MIN THEN CORRECTED ITSELF.*ON TAXI IN WE GOT A FMC DISAGREE MESSAGE THAT CLEARED WITHIN 30 SECONDS. GROUNDED - YES. CONFIRMED INFLT FAULT FROM FMCS BITE FOR "L FMC" ON LAST LEG ONLY, NO CURRENT FAULTS. PERFORMED OPS TEST OF FMCS REF B737-800 AMM 34-61-00-710-801, OPS TEST GOOD. NO RECENT FAULTS. A/C OK FOR SERVICE.

---
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.