# SDR DXTA2009122103906

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2009
- Submitted: December 21, 2009
- Operation: Air carrier
- Aircraft: N609QS
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605522
- Aircraft time: 4,882 hours, 3,752 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Circuit Board
- Condition: Intermittent
- Location: Mlg
- Stage of operation: CL
- 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/DXTA2009122103906

## Discrepancy

UNSAFE NOSE GEAR INDICATION.  2 GREEN 1 RED INDICATION, NO AOA INDEXER. DURING THE VECTORS TO RUN THE CHECKLIST, THE GREEN NOSE INDICATION CAME ON WITH AOA INDEXER AFTER ABOUT 5 MINUTES. LANDING WAS UNEVENTFUL.  FOUND INTERMITTENT PC BOARDS NZ004 AND NZ009. REMOVED AND REPLACED BOTH BOARDS WITH NEW. SYS OPS CHECKS GOOD REF MM 32-61-00, REMOVED PCB-LANDING GEAR CONT NZ009 PN 6618735-1, SN 0127 INOPERATIVE.

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