# SDR AALA2019062879009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2019
- Submitted: June 28, 2019
- Operation: Air carrier
- Aircraft: [N927AN](https://openairdocs.org/aircraft/N927AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30077
- Aircraft time: 58,560 hours, 24,131 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Part number: 1762000101
- Part serial: 0003102
- Condition: Faulted
- Location: Vnav
- Stage of operation: CL
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019062879009

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS AFTER TAKEOFF WHEN VNAV WAS SELECTED THE MAGENTA SELECTED SPEED WOULD NOT COMMAND AND DISPLAY THE FMS SPEED OF 250 KTS ON BOTH CAPTAINS AND FOS PFD. SPD INTV WOULD ALLOW 250 KTS TO BE DISPLAYED ON BOTH PFD. MAINTENANCE REMOVED & REPLACED #1 FMC IAW AMM. PERFORMED OPS CHECKS WITH NO FAULTS IAW AMM 34-61-00.

---
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.