# SDR ASAA12511542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2012
- Submitted: May 14, 2012
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 15,319 hours, 4,903 cycles
- Engine: Cfmint CFM567B273
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Faulted
- 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/ASAA12511542

## Discrepancy

AFTER PASSING 00HIL INTERSECTION, NR 1 CDU WENT BLANK, EXEC LIGHT ILLUMINATED, THIS LASTED FOR APPROX 10 SECS THEN SCREEN CAME BACK WITH SOME TEST DATA AND "BIT PASSED" ANNUNCIATION.  ACFT GROUNDED.  LT & RT FMC'S FFR FOR PREV FLT (1) SHOW "SCU LEFT B" FAULTS CHECKED.  NO HISTORY.  LT FMC CDU CURRENTLY OK.  ACCOMPLISHED FIM 34-61/T804.  OPS CHECKED LT FMC CDU, GOOD.  INTERMITTENT FAULT.

---
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.