# SDR 20010227CW010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2001
- Submitted: February 27, 2001
- Operation: Air carrier
- Aircraft: [N72689](https://openairdocs.org/aircraft/N72689), registered now
- Make and model: Cessna 182S
- Registry model: [Cessna 182S](https://openairdocs.org/model/cessna-182s) (OpenAirDocs)
- Aircraft serial: 18280820
- Engine: Lyc IO540*
- System (JASC): [3110 · Instrument Panel](https://openairdocs.org/jasc/3110)
- Part: Light
- Condition: Inoperative
- Location: Instrument Panel
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20010227CW010

## Discrepancy

PILOT/OWNER REPORTED THAT RADIO INDICATOR BACKLIGHTING AND RADIO CONTROL BACKLIGHTING HAD NOT WORKED SINCE AIRCRAFT DELIVERY.  TROUBLESHOT SYSTEM, FOUND THAT PIN 1 OF JC005 WAS AT GROUND POTENTIAL, PREVENTING DIMMER POTENTIOMETER FROM FUNCTIONING AS IT IS SUPPOSED TO.  REMOVED WIRE 6JC015-1JC005 FROM CIRCUIT AND FOUND THAT RADIO LIGHTING WORKED AS IT WAS SUPPOSED TO.  WIRE 6JC015-1JC005 HOOKS INTO THE WARNING/CAUTION ANNUNCIATOR. THIS ANNUNCIATOR HAS ITS OWN SWITCH/ LOCATED AT THE TOP OF THE RADIO STACK/ FOR BRIGHT/DIM/TEST.

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