# SDR 2011FA0000579

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 8, 2011
- Submitted: September 8, 2011
- Operation: General aviation
- Aircraft: [N65647](https://openairdocs.org/aircraft/N65647), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S9778
- Aircraft time: 3,714 hours
- System (JASC): [3100 · Indicating/Recording System](https://openairdocs.org/jasc/3100)
- Part: Switch
- Part number: CM35895
- Condition: Failed
- Location: Navagation Light
- Part time: 1,691 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000579

## Discrepancy

ALL NAV LIGHTS INOPERATIVE ON PREFLIGHT , TROUBLESHOOT SYS FOUND SWITCH CM3589-5 FAILED, THIS IS THE 5TH SWITCH OF THIS PN CHANGED ON THIS MODLE OF ACFT.  HOURS VARY FROM 500 TO 3714.

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