# SDR ASAA2019050329233

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2019
- Submitted: May 6, 2019
- Operation: Air carrier
- Aircraft: [N517AS](https://openairdocs.org/aircraft/N517AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35197
- Aircraft time: 39,726 hours, 11,717 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019050329233

## Discrepancy

LNAV AND VNAV WILL NOT ENGAGE WITH EITHER FLIGHT DIRECTORS. GROUNDED - YES. CYCLED POWER ON AIRCRAFT PER AMM 20-60-99. LNAV AND VNAV NOW OPERATE NORMALLY PER PILOT PREFLIGHT CHECK.

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