# SDR IPXA09556292

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2009
- Submitted: June 10, 2009
- Operation: Air carrier
- Aircraft: [N412UP](https://openairdocs.org/aircraft/N412UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23852
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Switch
- Part number: 6224717004
- Condition: Inoperative
- Location: Autopilot Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA09556292

## Discrepancy

INSPECTION TYPE:N/A ATB - L NAV WOULD NOT ENGAGE - WHEN PRESSING L NAV SYSTEM LIGHTS ON PANEL WOULD SHORT OUT.  V NAV WOULD NOT ENGAGE.  FLT LEVEL CHANGE WOULD NOT ENGAGE.  DEFERRED PER MEL 22-11-4-11.  M402419 ASSIGNED.  ***SDR FILED OPEN***

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